Convert.ToSByte Method

Definition

Converts a specified value to an 8-bit signed integer.

Overloads

ToSByte(SByte)

Returns the specified 8-bit signed integer; no actual conversion is performed.

ToSByte(String, Int32)

Converts the string representation of a number in a specified base to an equivalent 8-bit signed integer.

ToSByte(String, IFormatProvider)

Converts the specified string representation of a number to an equivalent 8-bit signed integer, using the specified culture-specific formatting information.

ToSByte(Object, IFormatProvider)

Converts the value of the specified object to an 8-bit signed integer, using the specified culture-specific formatting information.

ToSByte(UInt64)

Converts the value of the specified 64-bit unsigned integer to an equivalent 8-bit signed integer.

ToSByte(UInt32)

Converts the value of the specified 32-bit unsigned integer to an equivalent 8-bit signed integer.

ToSByte(String)

Converts the specified string representation of a number to an equivalent 8-bit signed integer.

ToSByte(Single)

Converts the value of the specified single-precision floating-point number to an equivalent 8-bit signed integer.

ToSByte(Object)

Converts the value of the specified object to an 8-bit signed integer.

ToSByte(UInt16)

Converts the value of the specified 16-bit unsigned integer to the equivalent 8-bit signed integer.

ToSByte(Int32)

Converts the value of the specified 32-bit signed integer to an equivalent 8-bit signed integer.

ToSByte(Int64)

Converts the value of the specified 64-bit signed integer to an equivalent 8-bit signed integer.

ToSByte(Byte)

Converts the value of the specified 8-bit unsigned integer to the equivalent 8-bit signed integer.

ToSByte(Char)

Converts the value of the specified Unicode character to the equivalent 8-bit signed integer.

ToSByte(DateTime)

Calling this method always throws InvalidCastException.

ToSByte(Boolean)

Converts the specified Boolean value to the equivalent 8-bit signed integer.

ToSByte(Double)

Converts the value of the specified double-precision floating-point number to an equivalent 8-bit signed integer.

ToSByte(Int16)

Converts the value of the specified 16-bit signed integer to the equivalent 8-bit signed integer.

ToSByte(Decimal)

Converts the value of the specified decimal number to an equivalent 8-bit signed integer.

ToSByte(SByte)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Returns the specified 8-bit signed integer; no actual conversion is performed.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(sbyte value);

Parameters

value
SByte

The 8-bit signed integer to return.

Returns

value is returned unchanged.

Attributes

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(String, Int32)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the string representation of a number in a specified base to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(string value, int fromBase);
C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(string? value, int fromBase);

Parameters

value
String

A string that contains the number to convert.

fromBase
Int32

The base of the number in value, which must be 2, 8, 10, or 16.

Returns

An 8-bit signed integer that is equivalent to the number in value, or 0 (zero) if value is null.

Attributes

Exceptions

fromBase is not 2, 8, 10, or 16.

-or-

value, which represents a non-base 10 signed number, is prefixed with a negative sign.

value contains a character that is not a valid digit in the base specified by fromBase. The exception message indicates that there are no digits to convert if the first character in value is invalid; otherwise, the message indicates that value contains invalid trailing characters.

value, which represents a non-base 10 signed number, is prefixed with a negative sign.

-or-

value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.

Examples

The following example attempts to interpret the elements in a string array as the binary, octal, and hexadecimal representation of numeric values in order to convert them to unsigned bytes.

C#
using System;

public class Example
{
   public static void Main()
   {
      int[] baseValues = { 2, 8, 16};
      string[] values = { "FF", "81", "03", "11", "8F", "01", "1C", "111",
                          "123", "18A" };

      // Convert to each supported base.
      foreach (int baseValue in baseValues)
      {
         Console.WriteLine("Converting strings in base {0}:", baseValue);
         foreach (string value in values)
         {
            Console.Write("   '{0,-5}  -->  ", value + "'");
            try {
               Console.WriteLine(Convert.ToSByte(value, baseValue));
            }
            catch (FormatException) {
               Console.WriteLine("Bad Format");
            }
            catch (OverflowException) {
               Console.WriteLine("Out of Range");
            }
         }
         Console.WriteLine();
      }
   }
}
// The example displays the following output:
//       Converting strings in base 2:
//          'FF'    -->  Bad Format
//          '81'    -->  Bad Format
//          '03'    -->  Bad Format
//          '11'    -->  3
//          '8F'    -->  Bad Format
//          '01'    -->  1
//          '1C'    -->  Bad Format
//          '111'   -->  7
//          '123'   -->  Bad Format
//          '18A'   -->  Bad Format
//
//       Converting strings in base 8:
//          'FF'    -->  Bad Format
//          '81'    -->  Bad Format
//          '03'    -->  3
//          '11'    -->  9
//          '8F'    -->  Bad Format
//          '01'    -->  1
//          '1C'    -->  Bad Format
//          '111'   -->  73
//          '123'   -->  83
//          '18A'   -->  Bad Format
//
//       Converting strings in base 16:
//          'FF'    -->  -1
//          '81'    -->  -127
//          '03'    -->  3
//          '11'    -->  17
//          '8F'    -->  -113
//          '01'    -->  1
//          '1C'    -->  28
//          '111'   -->  Out of Range
//          '123'   -->  Out of Range
//          '18A'   -->  Out of Range

Remarks

If fromBase is 16, you can prefix the number specified by the value parameter with "0x" or "0X".

Because the negative sign is not supported for non-base 10 numeric representations, the ToSByte(String, Int32) method assumes that negative numbers use two's complement representation. In other words, the method always interprets the high-order bit of a byte (bit 7) as its sign bit. As a result, it is possible to write code in which a non-base 10 number that is out of the range of the SByte data type is converted to an SByte value without the method throwing an exception. The following example converts MaxValue to its hexadecimal string representation, and then calls the ToSByte(String, Int32) method. Instead of throwing an exception, the method displays the message, "0xff converts to -1."

C#
// Create a hexadecimal value out of range of the SByte type.
string value = Convert.ToString(byte.MaxValue, 16);
// Convert it back to a number.
try
{
   sbyte number = Convert.ToSByte(value, 16);
   Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to a signed byte.", value);
}

When performing binary operations or numeric conversions, it is always the responsibility of the developer to verify that a method is using the appropriate numeric representation to interpret a particular value. As the following example illustrates, you can ensure that the method handles overflows appropriately by first determining whether a value represents an unsigned or a signed type when converting it to its hexadecimal string representation. Throw an exception if the original value was an unsigned type but the conversion back to a signed byte yields a value whose sign bit is on.

C#
// Create a hexadecimal value out of range of the SByte type.
byte sourceNumber = byte.MaxValue;
bool isSigned = Math.Sign(Convert.ToDouble(sourceNumber.GetType().GetField("MinValue").GetValue(null))) == -1;
string value = Convert.ToString(sourceNumber, 16);
sbyte targetNumber;
try
{
   targetNumber = Convert.ToSByte(value, 16);
   if (!isSigned && ((targetNumber & 0x80) != 0))
      throw new OverflowException();
   else
      Console.WriteLine("0x{0} converts to {1}.", value, targetNumber);
}
catch (OverflowException)
{
   Console.WriteLine("Unable to convert '0x{0}' to a signed byte.", value);
}
// Displays the following to the console:
//    Unable to convert '0xff' to a signed byte.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(String, IFormatProvider)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the specified string representation of a number to an equivalent 8-bit signed integer, using the specified culture-specific formatting information.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(string value, IFormatProvider provider);
C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(string value, IFormatProvider? provider);

Parameters

value
String

A string that contains the number to convert.

provider
IFormatProvider

An object that supplies culture-specific formatting information.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is null.

value does not consist of an optional sign followed by a sequence of digits (0 through 9).

value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.

Examples

The following example converts string representations of SByte values with the ToSByte method, using an IFormatProvider object.

C#
// Example of the Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider ) methods.
using System;
using System.Globalization;

class ToSByteProviderDemo
{
    static string format = "{0,-20}{1,-20}{2}";

     // Get the exception type name; remove the namespace prefix.
    static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    static void ConvertToSByte( string numericStr,
        IFormatProvider provider )
    {
        object defaultValue;
        object providerValue;

        // Convert numericStr to SByte without a format provider.
        try
        {
            defaultValue = Convert.ToSByte( numericStr );
        }
        catch( Exception ex )
        {
            defaultValue = GetExceptionType( ex );
        }

        // Convert numericStr to SByte with a format provider.
        try
        {
            providerValue = Convert.ToSByte( numericStr, provider );
        }
        catch( Exception ex )
        {
            providerValue = GetExceptionType( ex );
        }

        Console.WriteLine( format, numericStr,
            defaultValue, providerValue );
    }

    public static void Main( )
    {
        // Create a NumberFormatInfo object and set several of its
        // properties that apply to numbers.
        NumberFormatInfo provider = new NumberFormatInfo();

        // These properties affect the conversion.
        provider.NegativeSign = "neg ";
        provider.PositiveSign = "pos ";

        // These properties do not affect the conversion.
        // The input string cannot have decimal and group separators.
        provider.NumberDecimalSeparator = ".";
        provider.NumberNegativePattern = 0;

        Console.WriteLine("This example of\n" +
            "  Convert.ToSByte( string ) and \n" +
            "  Convert.ToSByte( string, IFormatProvider ) " +
            "\ngenerates the following output. It converts " +
            "several strings to \nSByte values, using " +
            "default formatting or a NumberFormatInfo object.\n" );
        Console.WriteLine( format, "String to convert",
            "Default/exception", "Provider/exception" );
        Console.WriteLine( format, "-----------------",
            "-----------------", "------------------" );

        // Convert strings, with and without an IFormatProvider.
        ConvertToSByte( "123", provider );
        ConvertToSByte( "+123", provider );
        ConvertToSByte( "pos 123", provider );
        ConvertToSByte( "-123", provider );
        ConvertToSByte( "neg 123", provider );
        ConvertToSByte( "123.", provider );
        ConvertToSByte( "(123)", provider );
        ConvertToSByte( "128", provider );
        ConvertToSByte( "-129", provider );
    }
}

/*
This example of
  Convert.ToSByte( string ) and
  Convert.ToSByte( string, IFormatProvider )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.

String to convert   Default/exception   Provider/exception
-----------------   -----------------   ------------------
123                 123                 123
+123                123                 FormatException
pos 123             FormatException     123
-123                -123                FormatException
neg 123             FormatException     -123
123.                FormatException     FormatException
(123)               FormatException     FormatException
128                 OverflowException   OverflowException
-129                OverflowException   FormatException
*/

Remarks

provider is an IFormatProvider instance that obtains a NumberFormatInfo object. The NumberFormatInfo object provides culture-specific information about the format of value. If provider is null, the NumberFormatInfo for the current culture is used.

If you prefer not to handle an exception if the conversion fails, you can call the SByte.TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Object, IFormatProvider)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified object to an 8-bit signed integer, using the specified culture-specific formatting information.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(object value, IFormatProvider provider);
C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(object? value, IFormatProvider? provider);

Parameters

value
Object

An object that implements the IConvertible interface.

provider
IFormatProvider

An object that supplies culture-specific formatting information.

Returns

An 8-bit signed integer that is equivalent to value, or zero if value is null.

Attributes

Exceptions

value is not in an appropriate format.

value does not implement the IConvertible interface.

-or-

The conversion is not supported.

value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.

Examples

The following example defines a ByteString class that stores both signed and unsigned bytes as hexadecimal strings along with a field that indicates the sign of the byte. The ByteString class implements the IConvertible interface. Its IConvertible.ToSByte method calls the Parse(String, IFormatProvider) method to perform the conversion. If it fails, it throws an OverflowException.

C#
using System;
using System.Globalization;

public enum SignBit { Negative=-1, Zero=0, Positive=1 };

public struct ByteString : IConvertible
{
   private SignBit signBit;
   private string byteString;

   public SignBit Sign
   {
      set { signBit = value; }
      get { return signBit; }
   }

   public string Value
   {
      set {
         if (value.Trim().Length > 2)
            throw new ArgumentException("The string representation of a byte cannot have more than two characters.");
         else
            byteString = value;
      }
      get { return byteString; }
   }

   // IConvertible implementations.
   public TypeCode GetTypeCode() {
      return TypeCode.Object;
   }

   public bool ToBoolean(IFormatProvider provider)
   {
      if (signBit == SignBit.Zero)
         return false;
      else
         return true;
   }

   public byte ToByte(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToSByte(byteString, 16)));
      else
         return Byte.Parse(byteString, NumberStyles.HexNumber);
   }

   public char ToChar(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative) {
         throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToSByte(byteString, 16)));
      }
      else {
         byte byteValue = Byte.Parse(this.byteString, NumberStyles.HexNumber);
         return Convert.ToChar(byteValue);
      }
   }

   public DateTime ToDateTime(IFormatProvider provider)
   {
      throw new InvalidCastException("ByteString to DateTime conversion is not supported.");
   }

   public decimal ToDecimal(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
      {
         sbyte byteValue = SByte.Parse(byteString, NumberStyles.HexNumber);
         return Convert.ToDecimal(byteValue);
      }
      else
      {
         byte byteValue = Byte.Parse(byteString, NumberStyles.HexNumber);
         return Convert.ToDecimal(byteValue);
      }
   }

   public double ToDouble(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToDouble(SByte.Parse(byteString, NumberStyles.HexNumber));
      else
         return Convert.ToDouble(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public short ToInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToInt16(SByte.Parse(byteString, NumberStyles.HexNumber));
      else
         return Convert.ToInt16(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public int ToInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToInt32(SByte.Parse(byteString, NumberStyles.HexNumber));
      else
         return Convert.ToInt32(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public long ToInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToInt64(SByte.Parse(byteString, NumberStyles.HexNumber));
      else
         return Convert.ToInt64(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public sbyte ToSByte(IFormatProvider provider)
   {
      try {
         return SByte.Parse(byteString, NumberStyles.HexNumber);
      }
      catch (OverflowException e) {
         throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
                                                   Byte.Parse(byteString, NumberStyles.HexNumber)), e);
      }
   }

   public float ToSingle(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         return Convert.ToSingle(SByte.Parse(byteString, NumberStyles.HexNumber));
      else
         return Convert.ToSingle(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public string ToString(IFormatProvider provider)
   {
      return "0x" + this.byteString;
   }

   public object ToType(Type conversionType, IFormatProvider provider)
   {
      switch (Type.GetTypeCode(conversionType))
      {
         case TypeCode.Boolean:
            return this.ToBoolean(null);
         case TypeCode.Byte:
            return this.ToByte(null);
         case TypeCode.Char:
            return this.ToChar(null);
         case TypeCode.DateTime:
            return this.ToDateTime(null);
         case TypeCode.Decimal:
            return this.ToDecimal(null);
         case TypeCode.Double:
            return this.ToDouble(null);
         case TypeCode.Int16:
            return this.ToInt16(null);
         case TypeCode.Int32:
            return this.ToInt32(null);
         case TypeCode.Int64:
            return this.ToInt64(null);
         case TypeCode.Object:
            if (typeof(ByteString).Equals(conversionType))
               return this;
            else
               throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name));
         case TypeCode.SByte:
            return this.ToSByte(null);
         case TypeCode.Single:
            return this.ToSingle(null);
         case TypeCode.String:
            return this.ToString(null);
         case TypeCode.UInt16:
            return this.ToUInt16(null);
         case TypeCode.UInt32:
            return this.ToUInt32(null);
         case TypeCode.UInt64:
            return this.ToUInt64(null);
         default:
            throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name));
      }
   }

   public UInt16 ToUInt16(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
                                                   SByte.Parse(byteString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt16(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public UInt32 ToUInt32(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
                                                   SByte.Parse(byteString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt32(Byte.Parse(byteString, NumberStyles.HexNumber));
   }

   public UInt64 ToUInt64(IFormatProvider provider)
   {
      if (signBit == SignBit.Negative)
         throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
                                                   SByte.Parse(byteString, NumberStyles.HexNumber)));
      else
         return Convert.ToUInt64(Byte.Parse(byteString, NumberStyles.HexNumber));
   }
}

The following example shows how the IConvertible.ToSByte implementation of the ByteString class is called by the Convert.ToSByte(Object, IFormatProvider) method.

C#
public class Class1
{
   public static void Main()
   {
      sbyte positiveByte = 120;
      sbyte negativeByte = -101;

      ByteString positiveString = new ByteString();
      positiveString.Sign = (SignBit) Math.Sign(positiveByte);
      positiveString.Value = positiveByte.ToString("X2");

      ByteString negativeString = new ByteString();
      negativeString.Sign = (SignBit) Math.Sign(negativeByte);
      negativeString.Value = negativeByte.ToString("X2");

      try {
         Console.WriteLine("'{0}' converts to {1}.", positiveString.Value, Convert.ToSByte(positiveString));
      }
      catch (OverflowException) {
         Console.WriteLine("0x{0} is outside the range of the Byte type.", positiveString.Value);
      }

      try {
         Console.WriteLine("'{0}' converts to {1}.", negativeString.Value, Convert.ToSByte(negativeString));
      }
      catch (OverflowException) {
         Console.WriteLine("0x{0} is outside the range of the Byte type.", negativeString.Value);
      }
   }
}
// The example displays the following output:
//       '78' converts to 120.
//       '9B' converts to -101.

Remarks

provider enables the user to specify culture-specific conversion information about the contents of value. For example, if value is a String that represents a number, provider could supply culture-specific information about the notation used to represent that number.

The base types ignore provider; however, the parameter may be used if value is a user-defined type that implements the IConvertible interface.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(UInt64)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 64-bit unsigned integer to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(ulong value);

Parameters

value
UInt64

The 64-bit unsigned integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of long integers to a signed byte.

C#
ulong[] numbers = { UInt64.MinValue, 121, 340, UInt64.MaxValue };
sbyte result;

foreach (ulong number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt64 value 0 to the SByte value 0.
//    Converted the UInt64 value 121 to the SByte value 121.
//    The UInt64 value 340 is outside the range of the SByte type.
//    The UInt64 value 18446744073709551615 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(UInt32)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 32-bit unsigned integer to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(uint value);

Parameters

value
UInt32

The 32-bit unsigned integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an integer array to a signed byte.

C#
uint[] numbers = { UInt32.MinValue, 121, 340, UInt32.MaxValue };
sbyte result;

foreach (uint number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt32 value 0 to the SByte value 0.
//    Converted the UInt32 value 121 to the SByte value 121.
//    The UInt32 value 340 is outside the range of the SByte type.
//    The UInt32 value 4294967295 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(String)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the specified string representation of a number to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(string value);
C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(string? value);

Parameters

value
String

A string that contains the number to convert.

Returns

An 8-bit signed integer that is equivalent to the number in value, or 0 (zero) if value is null.

Attributes

Exceptions

value does not consist of an optional sign followed by a sequence of digits (0 through 9).

value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.

Examples

The following example converts string representations of SByte values with the ToSByte method, using default formatting.

C#
// Example of the Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider ) methods.
using System;
using System.Globalization;

class ToSByteProviderDemo
{
    static string format = "{0,-20}{1,-20}{2}";

     // Get the exception type name; remove the namespace prefix.
    static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    static void ConvertToSByte( string numericStr,
        IFormatProvider provider )
    {
        object defaultValue;
        object providerValue;

        // Convert numericStr to SByte without a format provider.
        try
        {
            defaultValue = Convert.ToSByte( numericStr );
        }
        catch( Exception ex )
        {
            defaultValue = GetExceptionType( ex );
        }

        // Convert numericStr to SByte with a format provider.
        try
        {
            providerValue = Convert.ToSByte( numericStr, provider );
        }
        catch( Exception ex )
        {
            providerValue = GetExceptionType( ex );
        }

        Console.WriteLine( format, numericStr,
            defaultValue, providerValue );
    }

    public static void Main( )
    {
        // Create a NumberFormatInfo object and set several of its
        // properties that apply to numbers.
        NumberFormatInfo provider = new NumberFormatInfo();

        // These properties affect the conversion.
        provider.NegativeSign = "neg ";
        provider.PositiveSign = "pos ";

        // These properties do not affect the conversion.
        // The input string cannot have decimal and group separators.
        provider.NumberDecimalSeparator = ".";
        provider.NumberNegativePattern = 0;

        Console.WriteLine("This example of\n" +
            "  Convert.ToSByte( string ) and \n" +
            "  Convert.ToSByte( string, IFormatProvider ) " +
            "\ngenerates the following output. It converts " +
            "several strings to \nSByte values, using " +
            "default formatting or a NumberFormatInfo object.\n" );
        Console.WriteLine( format, "String to convert",
            "Default/exception", "Provider/exception" );
        Console.WriteLine( format, "-----------------",
            "-----------------", "------------------" );

        // Convert strings, with and without an IFormatProvider.
        ConvertToSByte( "123", provider );
        ConvertToSByte( "+123", provider );
        ConvertToSByte( "pos 123", provider );
        ConvertToSByte( "-123", provider );
        ConvertToSByte( "neg 123", provider );
        ConvertToSByte( "123.", provider );
        ConvertToSByte( "(123)", provider );
        ConvertToSByte( "128", provider );
        ConvertToSByte( "-129", provider );
    }
}

/*
This example of
  Convert.ToSByte( string ) and
  Convert.ToSByte( string, IFormatProvider )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.

String to convert   Default/exception   Provider/exception
-----------------   -----------------   ------------------
123                 123                 123
+123                123                 FormatException
pos 123             FormatException     123
-123                -123                FormatException
neg 123             FormatException     -123
123.                FormatException     FormatException
(123)               FormatException     FormatException
128                 OverflowException   OverflowException
-129                OverflowException   FormatException
*/

Remarks

Using the ToSByte(String) method is equivalent to passing value to the SByte.Parse(String) method. value is interpreted by using the formatting conventions of the current culture.

If you prefer not to handle an exception if the conversion fails, you can call the SByte.TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Single)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified single-precision floating-point number to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(float value);

Parameters

value
Single

The single-precision floating-point number to convert.

Returns

value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of Single values to a signed byte.

C#
object[] values = { true, -12, 163, 935, 'x', "104", "103.0", "-1",
                    "1.00e2", "One", 1.00e2};
sbyte result;

foreach (object value in values)
{
   try {
      result = Convert.ToSByte(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        value.GetType().Name, value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Converted the Boolean value true to the SByte value 1.
//    Converted the Int32 value -12 to the SByte value -12.
//    The Int32 value 163 is outside the range of the SByte type.
//    The Int32 value 935 is outside the range of the SByte type.
//    Converted the Char value x to the SByte value 120.
//    Converted the String value 104 to the SByte value 104.
//    The String value 103.0 is not in a recognizable format.
//    Converted the String value -1 to the SByte value -1.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value 100 to the SByte value 100.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Object)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified object to an 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(object value);
C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(object? value);

Parameters

value
Object

An object that implements the IConvertible interface, or null.

Returns

An 8-bit signed integer that is equivalent to value, or zero if value is null.

Attributes

Exceptions

value is not in an appropriate format.

value does not implement the IConvertible interface.

-or-

The conversion is not supported.

value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.

Examples

The following example attempts to convert each element in an object array to a signed byte.

C#
object[] values = { true, -12, 163, 935, 'x', "104", "103.0", "-1",
                    "1.00e2", "One", 1.00e2};
sbyte result;

foreach (object value in values)
{
   try {
      result = Convert.ToSByte(value);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        value.GetType().Name, value);
   }
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Converted the Boolean value true to the SByte value 1.
//    Converted the Int32 value -12 to the SByte value -12.
//    The Int32 value 163 is outside the range of the SByte type.
//    The Int32 value 935 is outside the range of the SByte type.
//    Converted the Char value x to the SByte value 120.
//    Converted the String value 104 to the SByte value 104.
//    The String value 103.0 is not in a recognizable format.
//    Converted the String value -1 to the SByte value -1.
//    The String value 1.00e2 is not in a recognizable format.
//    The String value One is not in a recognizable format.
//    Converted the Double value 100 to the SByte value 100.

Remarks

The return value is the result of invoking the IConvertible.ToSByte method of the underlying type of value.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(UInt16)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 16-bit unsigned integer to the equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(ushort value);

Parameters

value
UInt16

The 16-bit unsigned integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue.

Examples

The following example attempts to convert each element in an array of unsigned 16-bit integers to a signed byte.

C#
ushort[] numbers = { UInt16.MinValue, 121, 340, UInt16.MaxValue };
sbyte result;

foreach (ushort number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the UInt16 value 0 to the SByte value 0.
//    Converted the UInt16 value 121 to the SByte value 121.
//    The UInt16 value 340 is outside the range of the SByte type.
//    The UInt16 value 65535 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Int32)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 32-bit signed integer to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(int value);

Parameters

value
Int32

The 32-bit signed integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of signed integers to a signed byte.

C#
int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
sbyte result;

foreach (int number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int32 value -2147483648 is outside the range of the SByte type.
//    Converted the Int32 value -1 to the SByte value -1.
//    Converted the Int32 value 0 to the SByte value 0.
//    Converted the Int32 value 121 to the SByte value 121.
//    The Int32 value 340 is outside the range of the SByte type.
//    The Int32 value 2147483647 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Int64)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 64-bit signed integer to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(long value);

Parameters

value
Int64

The 64-bit signed integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of long integers to a signed byte.

C#
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
sbyte result;
foreach (long number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int64 value -9223372036854775808 is outside the range of the SByte type.
//    Converted the Int64 value -1 to the SByte value -1.
//    Converted the Int64 value 0 to the SByte value 0.
//    Converted the Int64 value 121 to the SByte value 121.
//    The Int64 value 340 is outside the range of the SByte type.
//    The Int64 value 9223372036854775807 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Byte)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 8-bit unsigned integer to the equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(byte value);

Parameters

value
Byte

The 8-bit unsigned integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue.

Examples

The following example attempts to convert each element in a byte array to a signed byte.

C#
byte[] numbers = { Byte.MinValue, 10, 100, Byte.MaxValue };
sbyte result;

foreach (byte number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    Converted the Byte value 0 to the SByte value 0.
//    Converted the Byte value 10 to the SByte value 10.
//    Converted the Byte value 100 to the SByte value 100.
//    The Byte value 255 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Char)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified Unicode character to the equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(char value);

Parameters

value
Char

The Unicode character to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue.

Examples

The following example attempts to convert each element in an array of Char values to a signed byte.

C#
char[] chars = { 'a', 'z', '\u0007', '\u0200', '\u1023' };
foreach (char ch in chars)
{
   try {
      sbyte result = Convert.ToSByte(ch);
      Console.WriteLine("{0} is converted to {1}.", ch, result);
   }
   catch (OverflowException) {
      Console.WriteLine("Unable to convert u+{0} to a byte.",
                        Convert.ToInt16(ch).ToString("X4"));
   }
}
// The example displays the following output:
//    a is converted to 97.
//    z is converted to 122.
//     is converted to 7.
//    Unable to convert u+00C8 to a byte.
//    Unable to convert u+03FF to a byte.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(DateTime)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Calling this method always throws InvalidCastException.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(DateTime value);

Parameters

value
DateTime

The date and time value to convert.

Returns

This conversion is not supported. No value is returned.

Attributes

Exceptions

This conversion is not supported.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1

ToSByte(Boolean)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the specified Boolean value to the equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(bool value);

Parameters

value
Boolean

The Boolean value to convert.

Returns

The number 1 if value is true; otherwise, 0.

Attributes

Examples

The following example converts the Boolean values true and false to signed byte values.

C#
bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine("{0} converts to {1}.", falseFlag,
                  Convert.ToSByte(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
                  Convert.ToSByte(trueFlag));
// The example displays the following output:
//       false converts to 0.
//       true converts to 1.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Double)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified double-precision floating-point number to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(double value);

Parameters

value
Double

The double-precision floating-point number to convert.

Returns

value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of Double values to a signed byte.

C#
double[] numbers = { Double.MinValue, -129.5, -12.7, 0, 16,
                     103.6, 255.0, 1.63509e17, Double.MaxValue};
sbyte result;

foreach (double number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Double value -1.79769313486232E+308 is outside the range of the SByte type.
//    The Double value -129.5 is outside the range of the SByte type.
//    Converted the Double value -12.7 to the SByte value -13.
//    Converted the Double value 0 to the SByte value 0.
//    Converted the Double value 16 to the SByte value 16.
//    Converted the Double value 103.6 to the SByte value 104.
//    The Double value 255 is outside the range of the SByte type.
//    The Double value 1.63509E+17 is outside the range of the SByte type.
//    The Double value 1.79769313486232E+308 is outside the range of the SByte type.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Int16)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified 16-bit signed integer to the equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(short value);

Parameters

value
Int16

The 16-bit signed integer to convert.

Returns

An 8-bit signed integer that is equivalent to value.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of signed 16-bit integers to a signed byte.

C#
short[] numbers = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue };
sbyte result;
foreach (short number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Int16 value -32768 is outside the range of the SByte type.
//    Converted the Int16 value -1 to the SByte value -1.
//    Converted the Int16 value 0 to the SByte value 0.
//    Converted the Int16 value 121 to the SByte value 121.
//    The Int16 value 340 is outside the range of the SByte type.
//    The Int16 value 32767 is outside the range of the SByte type.

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0

ToSByte(Decimal)

Source:
Convert.cs
Source:
Convert.cs
Source:
Convert.cs

Important

This API is not CLS-compliant.

Converts the value of the specified decimal number to an equivalent 8-bit signed integer.

C#
[System.CLSCompliant(false)]
public static sbyte ToSByte(decimal value);

Parameters

value
Decimal

The decimal number to convert.

Returns

value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

Attributes

Exceptions

value is greater than SByte.MaxValue or less than SByte.MinValue.

Examples

The following example attempts to convert each element in an array of Decimal values to a signed byte.

C#
decimal[] numbers = { Decimal.MinValue, -129.5m, -12.7m, 0m, 16m,
                      103.6m, 255.0m, Decimal.MaxValue };
sbyte result;

foreach (decimal number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}
// The example displays the following output:
//    The Decimal value -79228162514264337593543950335 is outside the range of the SByte type.
//    The Decimal value -129.5 is outside the range of the SByte type.
//    Converted the Decimal value -12.7 to the SByte value -13.
//    Converted the Decimal value 0 to the SByte value 0.
//    Converted the Decimal value 16 to the SByte value 16.
//    Converted the Decimal value 103.6 to the SByte value 104.
//    The Decimal value 255 is outside the range of the SByte type.
//    The Decimal value 79228162514264337593543950335 is outside the range of the SByte type.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0