Decimal Explicit Conversion (Decimal to Int64)

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Converts a Decimal to a 64-bit signed integer.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Shared Narrowing Operator CType ( _
    value As Decimal _
) As Long
public static explicit operator long (
    decimal value
)

Parameters

Return Value

Type: System.Int64
A 64-bit signed integer that represents the converted Decimal.

Exceptions

Exception Condition
OverflowException

value is less than Int64.MinValue or greater than Int64.MaxValue.

Remarks

This operator supports the explicit conversion of a Decimal to a Int64. The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. The example illustrates the different return values when you explicitly convert a Decimal value to an Int64 value by using C# and Visual Basic. To perform a conversion that is independent of language, you can call the ToInt64 or the Convert.ToInt64(Decimal) method.

Examples

The following code example converts Decimal numbers to Int64 values using the explicit Decimal to Int64 conversion.

' Example of the explicit conversions from Decimal to Long and 
' Decimal to ULong.
Module Example

   Const formatter As String = "{0,25}{1,22}{2,22}"

   ' Convert the decimal argument catch exceptions that are thrown.
   Public Sub DecimalToU_Int64(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal argument As Decimal)
      Dim Int64Value As Object
      Dim UInt64Value As Object

      ' Convert the argument to a long value.
      Try
         Int64Value = CLng(argument)
      Catch ex As Exception
         Int64Value = ex.GetType().Name
      End Try

      ' Convert the argument to a ulong value.
      Try
         UInt64Value = CULng(argument)
      Catch ex As Exception
         UInt64Value = ex.GetType().Name
      End Try

      outputBlock.Text += String.Format(formatter, argument, _
          Int64Value, UInt64Value) + vbCrLf
   End Sub

   Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      outputBlock.Text += String.Format(formatter, "Decimal argument", _
          "Long/Exception", "ULong/Exception") + vbCrLf
      outputBlock.Text += String.Format(formatter, "----------------", _
          "--------------", "---------------") + vbCrLf

      ' Convert decimal values and display the results.
      DecimalToU_Int64(outputBlock, 123D)
      DecimalToU_Int64(outputBlock, New Decimal(123000, 0, 0, False, 3))
      DecimalToU_Int64(outputBlock, 123.999D)
      DecimalToU_Int64(outputBlock, 18446744073709551615.999D)
      DecimalToU_Int64(outputBlock, 18446744073709551616D)
      DecimalToU_Int64(outputBlock, 9223372036854775807.999D)
      DecimalToU_Int64(outputBlock, 9223372036854775808D)
      DecimalToU_Int64(outputBlock, -0.999D)
      DecimalToU_Int64(outputBlock, -1D)
      DecimalToU_Int64(outputBlock, -9223372036854775808.999D)
      DecimalToU_Int64(outputBlock, -9223372036854775809D)
   End Sub
End Module
' The example displays the following output:
'             Decimal argument        Long/Exception       ULong/Exception
'             ----------------        --------------       ---------------
'                          123                   123                   123
'                      123.000                   123                   123
'                      123.999                   124                   124
'     18446744073709551615.999     OverflowException     OverflowException
'         18446744073709551616     OverflowException     OverflowException
'      9223372036854775807.999     OverflowException   9223372036854775808
'          9223372036854775808     OverflowException   9223372036854775808
'                       -0.999                    -1     OverflowException
'                           -1                    -1     OverflowException
'     -9223372036854775808.999     OverflowException     OverflowException
'         -9223372036854775809     OverflowException     OverflowException
// Example of the explicit conversions from decimal to long and 
// decimal to ulong.
using System;

class Example
{
   const string formatter = "{0,25}{1,22}{2,22}";

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

   // Convert the decimal argument; catch exceptions that are thrown.
   public static void DecimalToU_Int64(System.Windows.Controls.TextBlock outputBlock, decimal argument)
   {
      object Int64Value;
      object UInt64Value;

      // Convert the argument to a long value.
      try
      {
         Int64Value = (long)argument;
      }
      catch (Exception ex)
      {
         Int64Value = GetExceptionType(ex);
      }

      // Convert the argument to a ulong value.
      try
      {
         UInt64Value = (ulong)argument;
      }
      catch (Exception ex)
      {
         UInt64Value = GetExceptionType(ex);
      }

      outputBlock.Text += String.Format(formatter, argument,
          Int64Value, UInt64Value) + "\n";
   }

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      outputBlock.Text += String.Format(
          "This example of the explicit conversions from decimal " +
          "to long \nand decimal to ulong generates the following " +
          "output. It displays \nseveral converted decimal " +
          "values.\n") + "\n";
      outputBlock.Text += String.Format(formatter, "decimal argument",
          "long/exception", "ulong/exception") + "\n";
      outputBlock.Text += String.Format(formatter, "----------------",
          "--------------", "---------------") + "\n";

      // Convert decimal values and display the results.
      DecimalToU_Int64(outputBlock, 123M);
      DecimalToU_Int64(outputBlock, new decimal(123000, 0, 0, false, 3));
      DecimalToU_Int64(outputBlock, 123.999M);
      DecimalToU_Int64(outputBlock, 18446744073709551615.999M);
      DecimalToU_Int64(outputBlock, 18446744073709551616M);
      DecimalToU_Int64(outputBlock, 9223372036854775807.999M);
      DecimalToU_Int64(outputBlock, 9223372036854775808M);
      DecimalToU_Int64(outputBlock, -0.999M);
      DecimalToU_Int64(outputBlock, -1M);
      DecimalToU_Int64(outputBlock, -9223372036854775808.999M);
      DecimalToU_Int64(outputBlock, -9223372036854775809M);
   }
}

/*
This example of the explicit conversions from decimal to long
and decimal to ulong generates the following output. It displays
several converted decimal values.

         decimal argument        long/exception       ulong/exception
         ----------------        --------------       ---------------
                      123                   123                   123
                  123.000                   123                   123
                  123.999                   123                   123
 18446744073709551615.999     OverflowException  18446744073709551615
     18446744073709551616     OverflowException     OverflowException
  9223372036854775807.999   9223372036854775807   9223372036854775807
      9223372036854775808     OverflowException   9223372036854775808
                   -0.999                     0                     0
                       -1                    -1     OverflowException
 -9223372036854775808.999  -9223372036854775808     OverflowException
     -9223372036854775809     OverflowException     OverflowException
*/

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.