Decimal.Equals Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Returns a value indicating whether two instances of Decimal represent the same value.
Overloads
| Equals(Decimal, Decimal) |
Returns a value indicating whether two specified instances of Decimal represent the same value. |
| Equals(Decimal) |
Returns a value indicating whether this instance and a specified Decimal object represent the same value. |
| Equals(Object) |
Returns a value indicating whether this instance and a specified Object represent the same type and value. |
Equals(Decimal, Decimal)
- Source:
- Decimal.cs
- Source:
- Decimal.cs
- Source:
- Decimal.cs
Returns a value indicating whether two specified instances of Decimal represent the same value.
public:
static bool Equals(System::Decimal d1, System::Decimal d2);public static bool Equals (decimal d1, decimal d2);static member Equals : decimal * decimal -> boolPublic Shared Function Equals (d1 As Decimal, d2 As Decimal) As BooleanParameters
- d1
- Decimal
The first value to compare.
- d2
- Decimal
The second value to compare.
Returns
true if d1 and d2 are equal; otherwise, false.
Examples
The following code example compares several Decimal values to a reference Decimal value using the static Equals method.
// Example of the Decimal::Compare and static Decimal::Equals methods.
using namespace System;
const __wchar_t * protoFmt = L"{0,-45}{1}";
// Compare Decimal parameters, and display them with the results.
void CompareDecimals( Decimal Left, Decimal Right, String^ RightText )
{
String^ dataFmt = gcnew String( protoFmt );
Console::WriteLine();
Console::WriteLine( dataFmt, String::Concat( "Right: ", RightText ), Right );
Console::WriteLine( dataFmt, "Decimal::Equals( Left, Right )", Decimal::Equals( Left, Right ) );
Console::WriteLine( dataFmt, "Decimal::Compare( Left, Right )", Decimal::Compare( Left, Right ) );
}
int main()
{
Console::WriteLine( "This example of the Decimal::Equals( Decimal, Decimal "
") and \nDecimal::Compare( Decimal, Decimal ) "
"methods generates the \nfollowing output. It creates "
"several different Decimal \nvalues and compares them "
"with the following reference value.\n" );
// Create a reference Decimal value.
Decimal Left = Decimal(123.456);
Console::WriteLine( gcnew String( protoFmt ), "Left: Decimal( 123.456 )", Left );
// Create Decimal values to compare with the reference.
CompareDecimals( Left, Decimal(1.2345600E+2), "Decimal( 1.2345600E+2 )" );
CompareDecimals( Left, Decimal::Parse( "123.4561" ), "Decimal::Parse( \"123.4561\" )" );
CompareDecimals( Left, Decimal::Parse( "123.4559" ), "Decimal::Parse( \"123.4559\" )" );
CompareDecimals( Left, Decimal::Parse( "123.456000" ), "Decimal::Parse( \"123.456000\" )" );
CompareDecimals( Left, Decimal(123456000,0,0,false,6), "Decimal( 123456000, 0, 0, false, 6 )" );
}
/*
This example of the Decimal::Equals( Decimal, Decimal ) and
Decimal::Compare( Decimal, Decimal ) methods generates the
following output. It creates several different Decimal
values and compares them with the following reference value.
Left: Decimal( 123.456 ) 123.456
Right: Decimal( 1.2345600E+2 ) 123.456
Decimal::Equals( Left, Right ) True
Decimal::Compare( Left, Right ) 0
Right: Decimal::Parse( "123.4561" ) 123.4561
Decimal::Equals( Left, Right ) False
Decimal::Compare( Left, Right ) -1
Right: Decimal::Parse( "123.4559" ) 123.4559
Decimal::Equals( Left, Right ) False
Decimal::Compare( Left, Right ) 1
Right: Decimal::Parse( "123.456000" ) 123.456000
Decimal::Equals( Left, Right ) True
Decimal::Compare( Left, Right ) 0
Right: Decimal( 123456000, 0, 0, false, 6 ) 123.456000
Decimal::Equals( Left, Right ) True
Decimal::Compare( Left, Right ) 0
*/
// Example of the decimal.Compare and static decimal.Equals methods.
using System;
class DecCompareEqualsDemo
{
const string dataFmt = "{0,-45}{1}";
// Compare decimal parameters, and display them with the results.
public static void CompareDecimals( decimal Left, decimal Right,
string RightText )
{
Console.WriteLine( );
Console.WriteLine( dataFmt, "Right: "+RightText, Right );
Console.WriteLine( dataFmt, "decimal.Equals( Left, Right )",
Decimal.Equals( Left, Right ) );
Console.WriteLine( dataFmt, "decimal.Compare( Left, Right )",
Decimal.Compare( Left, Right ) );
}
public static void Main( )
{
Console.WriteLine( "This example of the " +
"decimal.Equals( decimal, decimal ) and \n" +
"decimal.Compare( decimal, decimal ) methods " +
"generates the \nfollowing output. It creates several " +
"different decimal \nvalues and compares them with " +
"the following reference value.\n" );
// Create a reference decimal value.
decimal Left = new decimal( 123.456 );
Console.WriteLine( dataFmt, "Left: decimal( 123.456 )",
Left );
// Create decimal values to compare with the reference.
CompareDecimals( Left, new decimal( 1.2345600E+2 ),
"decimal( 1.2345600E+2 )" );
CompareDecimals( Left, 123.4561M, "123.4561M" );
CompareDecimals( Left, 123.4559M, "123.4559M" );
CompareDecimals( Left, 123.456000M, "123.456000M" );
CompareDecimals( Left,
new decimal( 123456000, 0, 0, false, 6 ),
"decimal( 123456000, 0, 0, false, 6 )" );
}
}
/*
This example of the decimal.Equals( decimal, decimal ) and
decimal.Compare( decimal, decimal ) methods generates the
following output. It creates several different decimal
values and compares them with the following reference value.
Left: decimal( 123.456 ) 123.456
Right: decimal( 1.2345600E+2 ) 123.456
decimal.Equals( Left, Right ) True
decimal.Compare( Left, Right ) 0
Right: 123.4561M 123.4561
decimal.Equals( Left, Right ) False
decimal.Compare( Left, Right ) -1
Right: 123.4559M 123.4559
decimal.Equals( Left, Right ) False
decimal.Compare( Left, Right ) 1
Right: 123.456000M 123.456000
decimal.Equals( Left, Right ) True
decimal.Compare( Left, Right ) 0
Right: decimal( 123456000, 0, 0, false, 6 ) 123.456000
decimal.Equals( Left, Right ) True
decimal.Compare( Left, Right ) 0
*/
// Example of the decimal.Compare and static decimal.Equals methods.
open System
let print message obj = printfn $"%-45s{message}{obj}"
// Compare decimal parameters, and display them with the results.
let compareDecimals (left: decimal) (right: decimal) (rightText: string) =
printfn ""
print $"right: {rightText}" right
print "decimal.Equals(left, right) " (Decimal.Equals(left, right))
print "decimal.Compare(left, right) " (Decimal.Compare(left, right))
Console.WriteLine( "This example of the " +
"decimal.Equals(decimal, decimal) and \n" +
"decimal.Compare(decimal, decimal) methods " +
"generates the \nfollowing output. It creates several " +
"different decimal \nvalues and compares them with " +
"the following reference value.\n" )
// Create a reference decimal value.
let left = decimal 123.456
print "left: decimal( 123.456 )" left
// Create decimal values to compare with the reference.
compareDecimals left (decimal 1.2345600E+2 ) "decimal(1.2345600E+2)"
compareDecimals left 123.4561M "123.4561M"
compareDecimals left 123.4559M "123.4559M"
compareDecimals left 123.456000M "123.456000M"
compareDecimals left (Decimal(123456000, 0, 0, false, 6uy)) "Decimal(123456000, 0, 0, false, 6)"
// This example of the decimal.Equals(decimal, decimal) and
// decimal.Compare(decimal, decimal) methods generates the
// following output. It creates several different decimal
// values and compares them with the following reference value.
// left: decimal(123.456) 123.456
// right: decimal(1.2345600E+2) 123.456
// decimal.Equals(left, right) True
// decimal.Compare(left, right) 0
// right: 123.4561M 123.4561
// decimal.Equals(left, right) False
// decimal.Compare(left, right) -1
// right: 123.4559M 123.4559
// decimal.Equals(left, right) False
// decimal.Compare(left, right) 1
// right: 123.456000M 123.456000
// decimal.Equals(left, right) True
// decimal.Compare(left, right) 0
// right: decimal(123456000, 0, 0, false, 6) 123.456000
// decimal.Equals(left, right) True
// decimal.Compare(left, right) 0
' Example of the Decimal.Compare and static Decimal.Equals methods.
Module DecCompareEqualsDemo
Const dataFmt As String = "{0,-45}{1}"
' Compare Decimal parameters, and display them with the results.
Sub CompareDecimals( Left as Decimal, Right as Decimal, _
RightText as String )
Console.WriteLine( )
Console.WriteLine( dataFmt, "Right: " & RightText, Right )
Console.WriteLine( dataFmt, "Decimal.Equals( Left, Right )", _
Decimal.Equals( Left, Right ) )
Console.WriteLine( dataFmt, _
"Decimal.Compare( Left, Right )", _
Decimal.Compare( Left, Right ) )
End Sub
Sub Main( )
Console.WriteLine( _
"This example of the Decimal.Equals( Decimal, " & _
"Decimal ) and " & vbCrLf & "Decimal.Compare( " & _
"Decimal, Decimal ) methods generates the " & vbCrLf & _
"following output. It creates several different " & _
"Decimal " & vbCrLf & "values and compares them " & _
"with the following reference value." & vbCrLf )
' Create a reference Decimal value.
Dim Left as New Decimal( 123.456 )
Console.WriteLine( dataFmt, "Left: Decimal( 123.456 )", Left )
' Create Decimal values to compare with the reference.
CompareDecimals( Left, New Decimal( 1.2345600E+2 ), _
"Decimal( 1.2345600E+2 )" )
CompareDecimals( Left, 123.4561D, "123.4561D" )
CompareDecimals( Left, 123.4559D, "123.4559D" )
CompareDecimals( Left, 123.456000D, "123.456000D" )
CompareDecimals( Left, _
New Decimal( 123456000, 0, 0, false, 6 ), _
"Decimal( 123456000, 0, 0, false, 6 )" )
End Sub
End Module
' This example of the Decimal.Equals( Decimal, Decimal ) and
' Decimal.Compare( Decimal, Decimal ) methods generates the
' following output. It creates several different Decimal
' values and compares them with the following reference value.
'
' Left: Decimal( 123.456 ) 123.456
'
' Right: Decimal( 1.2345600E+2 ) 123.456
' Decimal.Equals( Left, Right ) True
' Decimal.Compare( Left, Right ) 0
'
' Right: 123.4561D 123.4561
' Decimal.Equals( Left, Right ) False
' Decimal.Compare( Left, Right ) -1
'
' Right: 123.4559D 123.4559
' Decimal.Equals( Left, Right ) False
' Decimal.Compare( Left, Right ) 1
'
' Right: 123.456000D 123.456
' Decimal.Equals( Left, Right ) True
' Decimal.Compare( Left, Right ) 0
'
' Right: Decimal( 123456000, 0, 0, false, 6 ) 123.456000
' Decimal.Equals( Left, Right ) True
' Decimal.Compare( Left, Right ) 0
See also
Applies to
Equals(Decimal)
- Source:
- Decimal.cs
- Source:
- Decimal.cs
- Source:
- Decimal.cs
Returns a value indicating whether this instance and a specified Decimal object represent the same value.
public:
virtual bool Equals(System::Decimal value);public bool Equals (decimal value);override this.Equals : decimal -> boolPublic Function Equals (value As Decimal) As BooleanParameters
- value
- Decimal
An object to compare to this instance.
Returns
true if value is equal to this instance; otherwise, false.
Implements
Remarks
This method implements the System.IEquatable<T> interface, and performs slightly better than Equals because it does not have to convert the value parameter to an object.
If value has fewer bits (is narrower) than the instance type, some programming languages perform an implicit widening conversion that transforms the value of the parameter into a value with more bits.
For example, suppose the instance type is Int32 and the parameter type is Byte. The Microsoft C# compiler generates instructions to represent the value of the parameter as an Int32 object, then generates a Int32.CompareTo method to compare the Int32 instance and parameter representation.
Consult your programming language's documentation to determine whether its compiler performs implicit widening conversions on numeric types.
Notes to Callers
Compiler overload resolution may account for an apparent difference in the behavior of the two Equals(Object) method overloads. If an implicit conversion between the value argument and a Decimal is defined and the argument is not typed as an Object, compilers may perform an implicit conversion and call the Equals(Decimal) method. Otherwise, they call the Equals(Object) method, which always returns false if its value argument is not a Decimal value. The following example illustrates the difference in behavior between the two method overloads. In the case of all primitive integral types, including both signed and unsigned types, the first comparison returns true because the compiler automatically performs a widening conversion and calls the Equals(Decimal) method, whereas the second comparison returns false because the compiler calls the Equals(Object) method.
using System;
public class Example
{
static decimal value = 112m;
public static void Main()
{
byte byte1= 112;
Console.WriteLine("value = byte1: {0,17}", value.Equals(byte1));
TestObjectForEquality(byte1);
short short1 = 112;
Console.WriteLine("value = short1: {0,17}", value.Equals(short1));
TestObjectForEquality(short1);
int int1 = 112;
Console.WriteLine("value = int1: {0,19}", value.Equals(int1));
TestObjectForEquality(int1);
long long1 = 112;
Console.WriteLine("value = long1: {0,18}", value.Equals(long1));
TestObjectForEquality(long1);
sbyte sbyte1 = 112;
Console.WriteLine("value = sbyte1: {0,17}", value.Equals(sbyte1));
TestObjectForEquality(sbyte1);
ushort ushort1 = 112;
Console.WriteLine("value = ushort1: {0,17}", value.Equals(ushort1));
TestObjectForEquality(ushort1);
uint uint1 = 112;
Console.WriteLine("value = uint1: {0,19}", value.Equals(uint1));
TestObjectForEquality(uint1);
ulong ulong1 = 112;
Console.WriteLine("value = ulong1: {0,18}", value.Equals(ulong1));
TestObjectForEquality(ulong1);
float sng1 = 112;
Console.WriteLine("value = sng1: {0,21}", value.Equals(sng1));
TestObjectForEquality(sng1);
double dbl1 = 112;
Console.WriteLine("value = dbl1: {0,21}", value.Equals(dbl1));
TestObjectForEquality(dbl1);
}
private static void TestObjectForEquality(Object obj)
{
Console.WriteLine("{0} ({1}) = {2} ({3}): {4}\n",
value, value.GetType().Name,
obj, obj.GetType().Name,
value.Equals(obj));
}
}
// The example displays the following output:
// value = byte1: True
// 112 (Decimal) = 112 (Byte): False
//
// value = short1: True
// 112 (Decimal) = 112 (Int16): False
//
// value = int1: True
// 112 (Decimal) = 112 (Int32): False
//
// value = long1: True
// 112 (Decimal) = 112 (Int64): False
//
// value = sbyte1: True
// 112 (Decimal) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Decimal) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Decimal) = 112 (UInt32): False
//
// value = ulong1: True
// 112 (Decimal) = 112 (UInt64): False
//
// value = sng1: False
// 112 (Decimal) = 112 (Single): False
//
// value = dbl1: False
// 112 (Decimal) = 112 (Double): False
let value = 112m
let testObjectForEquality (obj: obj) =
printfn $"{value} ({value.GetType().Name}) = {obj} ({obj.GetType().Name}): {value.Equals obj}\n"
let byte1 = 112uy
printfn $"value = byte1: {value.Equals byte1,17}"
testObjectForEquality byte1
let short1 = 112s
printfn $"value = short1: {value.Equals short1,17}"
testObjectForEquality short1
let int1 = 112
printfn $"value = int1: {value.Equals int1,19}"
testObjectForEquality int1
let long1 = 112L
printfn $"value = long1: {value.Equals long1,18}"
testObjectForEquality long1
let sbyte1 = 112y
printfn $"value = sbyte1: {value.Equals sbyte1,17}"
testObjectForEquality sbyte1
let ushort1 = 112us
printfn $"value = ushort1: {value.Equals ushort1,17}"
testObjectForEquality ushort1
let uint1 = 112u
printfn $"value = uint1: {value.Equals uint1,19}"
testObjectForEquality uint1
let ulong1 = 112uL
printfn $"value = ulong1: {value.Equals ulong1,18}"
testObjectForEquality ulong1
let sng1 = 112f
printfn $"value = sng1: {value.Equals sng1,21}"
testObjectForEquality sng1
let dbl1 = 112.
printfn $"value = dbl1: {value.Equals dbl1,21}"
testObjectForEquality dbl1
// The example displays the following output:
// value = byte1: True
// 112 (Decimal) = 112 (Byte): False
//
// value = short1: True
// 112 (Decimal) = 112 (Int16): False
//
// value = int1: True
// 112 (Decimal) = 112 (Int32): False
//
// value = long1: True
// 112 (Decimal) = 112 (Int64): False
//
// value = sbyte1: True
// 112 (Decimal) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Decimal) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Decimal) = 112 (UInt32): False
//
// value = ulong1: True
// 112 (Decimal) = 112 (UInt64): False
//
// value = sng1: False
// 112 (Decimal) = 112 (Single): False
//
// value = dbl1: False
// 112 (Decimal) = 112 (Double): False
Module Example
Dim value As Decimal = 112d
Public Sub Main()
Dim byte1 As Byte = 112
Console.WriteLine("value = byte1: {0,17}", value.Equals(byte1))
TestObjectForEquality(byte1)
Dim short1 As Short = 112
Console.WriteLine("value = short1: {0,17}", value.Equals(short1))
TestObjectForEquality(short1)
Dim int1 As Integer = 112
Console.WriteLine("value = int1: {0,19}", value.Equals(int1))
TestObjectForEquality(int1)
Dim long1 As Long = 112
Console.WriteLine("value = long1: {0,18}", value.Equals(long1))
TestObjectForEquality(long1)
Dim sbyte1 As SByte = 112
Console.WriteLine("value = sbyte1: {0,17}", value.Equals(sbyte1))
TestObjectForEquality(sbyte1)
Dim ushort1 As UShort = 112
Console.WriteLine("value = ushort1: {0,17}", value.Equals(ushort1))
TestObjectForEquality(ushort1)
Dim uint1 As UInteger = 112
Console.WriteLine("value = uint1: {0,19}", value.Equals(uint1))
TestObjectForEquality(uint1)
Dim ulong1 As ULong = 112
Console.WriteLine("value = ulong1: {0,18}", value.Equals(ulong1))
TestObjectForEquality(ulong1)
Dim sng1 As Single = 112
Console.WriteLine("value = sng1: {0,21}", value.Equals(sng1))
TestObjectForEquality(sng1)
Dim dbl1 As Double = 112
Console.WriteLine("value = dbl1: {0,21}", value.Equals(dbl1))
TestObjectForEquality(dbl1)
End Sub
Private Sub TestObjectForEquality(obj As Object)
Console.WriteLine("{0} ({1}) = {2} ({3}): {4}",
value, value.GetType().Name,
obj, obj.GetType().Name,
value.Equals(obj))
Console.WriteLine()
End Sub
End Module
' The example displays the following output:
' value = byte1: True
' 112 (Decimal) = 112 (Byte): False
'
' value = short1: True
' 112 (Decimal) = 112 (Int16): False
'
' value = int1: True
' 112 (Decimal) = 112 (Int32): False
'
' value = long1: True
' 112 (Decimal) = 112 (Int64): False
'
' value = sbyte1: True
' 112 (Decimal) = 112 (SByte): False
'
' value = ushort1: True
' 112 (Decimal) = 112 (UInt16): False
'
' value = uint1: True
' 112 (Decimal) = 112 (UInt32): False
'
' value = ulong1: True
' 112 (Decimal) = 112 (UInt64): False
'
' value = sng1: False
' 112 (Decimal) = 112 (Single): False
'
' value = dbl1: False
' 112 (Decimal) = 112 (Double): False
See also
Applies to
Equals(Object)
- Source:
- Decimal.cs
- Source:
- Decimal.cs
- Source:
- Decimal.cs
Returns a value indicating whether this instance and a specified Object represent the same type and value.
public:
override bool Equals(System::Object ^ value);public override bool Equals (object value);public override bool Equals (object? value);override this.Equals : obj -> boolPublic Overrides Function Equals (value As Object) As BooleanParameters
- value
- Object
The object to compare with this instance.
Returns
true if value is a Decimal and equal to this instance; otherwise, false.
Examples
The following code example compares several Decimal and other objects to a reference Decimal value using the Equals method.
// Example of the Decimal::CompareTo and Decimal::Equals instance
// methods.
using namespace System;
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
// Compare the Decimal to the Object parameters,
// and display the Object parameters with the results.
void CompDecimalToObject( Decimal Left, Object^ Right, String^ RightText )
{
Console::WriteLine( "{0,-46}{1}", String::Concat( "Object: ", RightText ), Right );
Console::WriteLine( "{0,-46}{1}", "Left.Equals( Object )", Left.Equals( Right ) );
Console::Write( "{0,-46}", "Left.CompareTo( Object )" );
try
{
// Catch the exception if CompareTo( ) throws one.
Console::WriteLine( "{0}\n", Left.CompareTo( Right ) );
}
catch ( Exception^ ex )
{
Console::WriteLine( "{0}\n", GetExceptionType( ex ) );
}
}
int main()
{
Console::WriteLine( "This example of the Decimal::Equals( Object* ) and \n"
"Decimal::CompareTo( Object* ) methods generates the \n"
"following output. It creates several different "
"Decimal \nvalues and compares them with the following "
"reference value.\n" );
// Create a reference Decimal value.
Decimal Left = Decimal(987.654);
Console::WriteLine( "{0,-46}{1}\n", "Left: Decimal( 987.654 )", Left );
// Create objects to compare with the reference.
CompDecimalToObject( Left, Decimal(9.8765400E+2), "Decimal( 9.8765400E+2 )" );
CompDecimalToObject( Left, Decimal::Parse( "987.6541" ), "Decimal::Parse( \"987.6541\" )" );
CompDecimalToObject( Left, Decimal::Parse( "987.6539" ), "Decimal::Parse( \"987.6539\" )" );
CompDecimalToObject( Left, Decimal(987654000,0,0,false,6), "Decimal( 987654000, 0, 0, false, 6 )" );
CompDecimalToObject( Left, 9.8765400E+2, "Double 9.8765400E+2" );
CompDecimalToObject( Left, "987.654", "String \"987.654\"" );
}
/*
This example of the Decimal::Equals( Object* ) and
Decimal::CompareTo( Object* ) methods generates the
following output. It creates several different Decimal
values and compares them with the following reference value.
Left: Decimal( 987.654 ) 987.654
Object: Decimal( 9.8765400E+2 ) 987.654
Left.Equals( Object ) True
Left.CompareTo( Object ) 0
Object: Decimal::Parse( "987.6541" ) 987.6541
Left.Equals( Object ) False
Left.CompareTo( Object ) -1
Object: Decimal::Parse( "987.6539" ) 987.6539
Left.Equals( Object ) False
Left.CompareTo( Object ) 1
Object: Decimal( 987654000, 0, 0, false, 6 ) 987.654000
Left.Equals( Object ) True
Left.CompareTo( Object ) 0
Object: Double 9.8765400E+2 987.654
Left.Equals( Object ) False
Left.CompareTo( Object ) ArgumentException
Object: String "987.654" 987.654
Left.Equals( Object ) False
Left.CompareTo( Object ) ArgumentException
*/
// Example of the decimal.CompareTo and decimal.Equals instance
// methods.
using System;
class DecCompToEqualsObjDemo
{
// 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 );
}
// Compare the decimal to the object parameters,
// and display the object parameters with the results.
public static void CompDecimalToObject( decimal Left,
object Right, string RightText )
{
Console.WriteLine( "{0,-46}{1}", "object: "+RightText,
Right );
Console.WriteLine( "{0,-46}{1}", "Left.Equals( object )",
Left.Equals( Right ) );
Console.Write( "{0,-46}", "Left.CompareTo( object )" );
try
{
// Catch the exception if CompareTo( ) throws one.
Console.WriteLine( "{0}\n", Left.CompareTo( Right ) );
}
catch( Exception ex )
{
Console.WriteLine( "{0}\n", GetExceptionType( ex ) );
}
}
public static void Main( )
{
Console.WriteLine(
"This example of the decimal.Equals( object ) and \n" +
"decimal.CompareTo( object ) methods generates the \n" +
"following output. It creates several different " +
"decimal \nvalues and compares them with the following " +
"reference value.\n" );
// Create a reference decimal value.
decimal Left = new decimal( 987.654 );
Console.WriteLine( "{0,-46}{1}\n",
"Left: decimal( 987.654 )", Left );
// Create objects to compare with the reference.
CompDecimalToObject( Left, new decimal( 9.8765400E+2 ),
"decimal( 9.8765400E+2 )" );
CompDecimalToObject( Left, 987.6541M, "987.6541D" );
CompDecimalToObject( Left, 987.6539M, "987.6539D" );
CompDecimalToObject( Left,
new decimal( 987654000, 0, 0, false, 6 ),
"decimal( 987654000, 0, 0, false, 6 )" );
CompDecimalToObject( Left, 9.8765400E+2,
"Double 9.8765400E+2" );
CompDecimalToObject( Left, "987.654", "String \"987.654\"" );
}
}
/*
This example of the decimal.Equals( object ) and
decimal.CompareTo( object ) methods generates the
following output. It creates several different decimal
values and compares them with the following reference value.
Left: decimal( 987.654 ) 987.654
object: decimal( 9.8765400E+2 ) 987.654
Left.Equals( object ) True
Left.CompareTo( object ) 0
object: 987.6541D 987.6541
Left.Equals( object ) False
Left.CompareTo( object ) -1
object: 987.6539D 987.6539
Left.Equals( object ) False
Left.CompareTo( object ) 1
object: decimal( 987654000, 0, 0, false, 6 ) 987.654000
Left.Equals( object ) True
Left.CompareTo( object ) 0
object: Double 9.8765400E+2 987.654
Left.Equals( object ) False
Left.CompareTo( object ) ArgumentException
object: String "987.654" 987.654
Left.Equals( object ) False
Left.CompareTo( object ) ArgumentException
*/
// Example of the decimal.CompareTo and decimal.Equals instance
// methods.
open System
// Get the exception type name remove the namespace prefix.
let getExceptionType (ex: exn) =
let exceptionType = ex.GetType() |> string
exceptionType.Substring(exceptionType.LastIndexOf '.' + 1)
// Compare the decimal to the object parameters,
// and display the object parameters with the results.
let compDecimalToObject (left: decimal) (right: obj) (rightText: string) =
printfn $"object: %-38s{rightText}{right}"
printfn $"""%-46s{"left.Equals(object)"}{left.Equals right}"""
printf $"""%-46s{"left.CompareTo(object)"}"""
try
// Catch the exception if CompareTo( ) throws one.
printfn $"{left.CompareTo right}\n"
with ex ->
printfn $"{getExceptionType ex}\n"
Console.WriteLine(
"This example of the decimal.Equals( object ) and \n" +
"decimal.CompareTo( object ) methods generates the \n" +
"following output. It creates several different " +
"decimal \nvalues and compares them with the following " +
"reference value.\n" )
// Create a reference decimal value.
let left = decimal 987.654
printfn $"""{"Left: decimal(987.654)",-46}{left}\n"""
// Create objects to compare with the reference.
compDecimalToObject left (decimal 9.8765400E+2 ) "decimal(9.8765400E+2)"
compDecimalToObject left 987.6541M "987.6541D"
compDecimalToObject left 987.6539M "987.6539D"
compDecimalToObject left (Decimal(987654000, 0, 0, false, 6uy)) "Decimal(987654000, 0, 0, false, 6)"
compDecimalToObject left 9.8765400E+2 "Double 9.8765400E+2"
compDecimalToObject left "987.654" "String \"987.654\""
// This example of the Decimal.Equals(object) and
// Decimal.CompareTo(object) methods generates the
// following output. It creates several different decimal
// values and compares them with the following reference value.
// Left: decimal(987.654) 987.654
//
// object: decimal(9.8765400E+2) 987.654
// left.Equals(object) True
// left.CompareTo(object) 0
//
// object: 987.6541D 987.6541
// left.Equals(object) False
// left.CompareTo(object) -1
//
// object: 987.6539D 987.6539
// left.Equals(object) False
// left.CompareTo(object) 1
//
// object: Decimal(987654000, 0, 0, false, 6) 987.654000
// left.Equals(object) True
// left.CompareTo(object) 0
//
// object: Double 9.8765400E+2 987.654
// left.Equals(object) False
// left.CompareTo(object) ArgumentException
//
// object: String "987.654" 987.654
// left.Equals(object) False
// left.CompareTo(object) ArgumentException
' Example of the Decimal.CompareTo and Decimal.Equals instance methods.
Module DecCompToEqualsObjDemo
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
Return exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
' Compare the Decimal to the Object parameters,
' and display the Object parameters with the results.
Sub CompDecimalToObject( Left as Decimal, Right as Object, _
RightText as String )
Console.WriteLine( "{0,-46}{1}", "Object: " & RightText, _
Right )
Console.WriteLine( "{0,-46}{1}", "Left.Equals( Object )", _
Left.Equals( Right ) )
Console.Write( "{0,-46}", "Left.CompareTo( Object )" )
' Catch the exception if CompareTo( ) throws one.
Try
Console.WriteLine( "{0}" & vbCrLf, _
Left.CompareTo( Right ) )
Catch ex As Exception
Console.WriteLine( "{0}" & vbCrLf, _
GetExceptionType( ex ) )
End Try
End Sub
Sub Main( )
Console.WriteLine( _
"This example of the Decimal.Equals( Object ) " & _
"and " & vbCrLf & "Decimal.CompareTo( Object ) " & _
"methods generates the " & vbCrLf & _
"following output. It creates several different " & _
"Decimal " & vbCrLf & "values and compares them " & _
"with the following reference value." & vbCrLf )
' Create a reference Decimal value.
Dim Left as New Decimal( 987.654 )
Console.WriteLine( "{0,-46}{1}" & vbCrLf, _
"Left: Decimal( 987.654 )", Left )
' Create objects to compare with the reference.
CompDecimalToObject( Left, New Decimal( 9.8765400E+2 ), _
"Decimal( 9.8765400E+2 )" )
CompDecimalToObject( Left, 987.6541D, "987.6541D" )
CompDecimalToObject( Left, 987.6539D, "987.6539D" )
CompDecimalToObject( Left, _
New Decimal( 987654000, 0, 0, false, 6 ), _
"Decimal( 987654000, 0, 0, false, 6 )" )
CompDecimalToObject( Left, 9.8765400E+2, _
"Double 9.8765400E+2" )
CompDecimalToObject( Left, "987.654", _
"String ""987.654""" )
End Sub
End Module
' This example of the Decimal.Equals( Object ) and
' Decimal.CompareTo( Object ) methods generates the
' following output. It creates several different Decimal
' values and compares them with the following reference value.
'
' Left: Decimal( 987.654 ) 987.654
'
' Object: Decimal( 9.8765400E+2 ) 987.654
' Left.Equals( Object ) True
' Left.CompareTo( Object ) 0
'
' Object: 987.6541D 987.6541
' Left.Equals( Object ) False
' Left.CompareTo( Object ) -1
'
' Object: 987.6539D 987.6539
' Left.Equals( Object ) False
' Left.CompareTo( Object ) 1
'
' Object: Decimal( 987654000, 0, 0, false, 6 ) 987.654000
' Left.Equals( Object ) True
' Left.CompareTo( Object ) 0
'
' Object: Double 9.8765400E+2 987.654
' Left.Equals( Object ) False
' Left.CompareTo( Object ) ArgumentException
'
' Object: String "987.654" 987.654
' Left.Equals( Object ) False
' Left.CompareTo( Object ) ArgumentException
Notes to Callers
Compiler overload resolution may account for an apparent difference in the behavior of the two Equals(Object) method overloads. If an implicit conversion between the value argument and a Decimal is defined and the argument is not typed as an Object, compilers may perform an implicit conversion and call the Equals(Decimal) method. Otherwise, they call the Equals(Object) method, which always returns false if its value argument is not a Decimal value. The following example illustrates the difference in behavior between the two method overloads. In the case of all primitive integral types, including both signed and unsigned types, the first comparison returns true because the compiler automatically performs a widening conversion and calls the Equals(Decimal) method, whereas the second comparison returns false because the compiler calls the Equals(Object) method.
using System;
public class Example
{
static decimal value = 112m;
public static void Main()
{
byte byte1= 112;
Console.WriteLine("value = byte1: {0,17}", value.Equals(byte1));
TestObjectForEquality(byte1);
short short1 = 112;
Console.WriteLine("value = short1: {0,17}", value.Equals(short1));
TestObjectForEquality(short1);
int int1 = 112;
Console.WriteLine("value = int1: {0,19}", value.Equals(int1));
TestObjectForEquality(int1);
long long1 = 112;
Console.WriteLine("value = long1: {0,18}", value.Equals(long1));
TestObjectForEquality(long1);
sbyte sbyte1 = 112;
Console.WriteLine("value = sbyte1: {0,17}", value.Equals(sbyte1));
TestObjectForEquality(sbyte1);
ushort ushort1 = 112;
Console.WriteLine("value = ushort1: {0,17}", value.Equals(ushort1));
TestObjectForEquality(ushort1);
uint uint1 = 112;
Console.WriteLine("value = uint1: {0,19}", value.Equals(uint1));
TestObjectForEquality(uint1);
ulong ulong1 = 112;
Console.WriteLine("value = ulong1: {0,18}", value.Equals(ulong1));
TestObjectForEquality(ulong1);
float sng1 = 112;
Console.WriteLine("value = sng1: {0,21}", value.Equals(sng1));
TestObjectForEquality(sng1);
double dbl1 = 112;
Console.WriteLine("value = dbl1: {0,21}", value.Equals(dbl1));
TestObjectForEquality(dbl1);
}
private static void TestObjectForEquality(Object obj)
{
Console.WriteLine("{0} ({1}) = {2} ({3}): {4}\n",
value, value.GetType().Name,
obj, obj.GetType().Name,
value.Equals(obj));
}
}
// The example displays the following output:
// value = byte1: True
// 112 (Decimal) = 112 (Byte): False
//
// value = short1: True
// 112 (Decimal) = 112 (Int16): False
//
// value = int1: True
// 112 (Decimal) = 112 (Int32): False
//
// value = long1: True
// 112 (Decimal) = 112 (Int64): False
//
// value = sbyte1: True
// 112 (Decimal) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Decimal) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Decimal) = 112 (UInt32): False
//
// value = ulong1: True
// 112 (Decimal) = 112 (UInt64): False
//
// value = sng1: False
// 112 (Decimal) = 112 (Single): False
//
// value = dbl1: False
// 112 (Decimal) = 112 (Double): False
let value = 112m
let testObjectForEquality (obj: obj) =
printfn $"{value} ({value.GetType().Name}) = {obj} ({obj.GetType().Name}): {value.Equals obj}\n"
let byte1 = 112uy
printfn $"value = byte1: {value.Equals byte1,17}"
testObjectForEquality byte1
let short1 = 112s
printfn $"value = short1: {value.Equals short1,17}"
testObjectForEquality short1
let int1 = 112
printfn $"value = int1: {value.Equals int1,19}"
testObjectForEquality int1
let long1 = 112L
printfn $"value = long1: {value.Equals long1,18}"
testObjectForEquality long1
let sbyte1 = 112y
printfn $"value = sbyte1: {value.Equals sbyte1,17}"
testObjectForEquality sbyte1
let ushort1 = 112us
printfn $"value = ushort1: {value.Equals ushort1,17}"
testObjectForEquality ushort1
let uint1 = 112u
printfn $"value = uint1: {value.Equals uint1,19}"
testObjectForEquality uint1
let ulong1 = 112uL
printfn $"value = ulong1: {value.Equals ulong1,18}"
testObjectForEquality ulong1
let sng1 = 112f
printfn $"value = sng1: {value.Equals sng1,21}"
testObjectForEquality sng1
let dbl1 = 112.
printfn $"value = dbl1: {value.Equals dbl1,21}"
testObjectForEquality dbl1
// The example displays the following output:
// value = byte1: True
// 112 (Decimal) = 112 (Byte): False
//
// value = short1: True
// 112 (Decimal) = 112 (Int16): False
//
// value = int1: True
// 112 (Decimal) = 112 (Int32): False
//
// value = long1: True
// 112 (Decimal) = 112 (Int64): False
//
// value = sbyte1: True
// 112 (Decimal) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Decimal) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Decimal) = 112 (UInt32): False
//
// value = ulong1: True
// 112 (Decimal) = 112 (UInt64): False
//
// value = sng1: False
// 112 (Decimal) = 112 (Single): False
//
// value = dbl1: False
// 112 (Decimal) = 112 (Double): False
Module Example
Dim value As Decimal = 112d
Public Sub Main()
Dim byte1 As Byte = 112
Console.WriteLine("value = byte1: {0,17}", value.Equals(byte1))
TestObjectForEquality(byte1)
Dim short1 As Short = 112
Console.WriteLine("value = short1: {0,17}", value.Equals(short1))
TestObjectForEquality(short1)
Dim int1 As Integer = 112
Console.WriteLine("value = int1: {0,19}", value.Equals(int1))
TestObjectForEquality(int1)
Dim long1 As Long = 112
Console.WriteLine("value = long1: {0,18}", value.Equals(long1))
TestObjectForEquality(long1)
Dim sbyte1 As SByte = 112
Console.WriteLine("value = sbyte1: {0,17}", value.Equals(sbyte1))
TestObjectForEquality(sbyte1)
Dim ushort1 As UShort = 112
Console.WriteLine("value = ushort1: {0,17}", value.Equals(ushort1))
TestObjectForEquality(ushort1)
Dim uint1 As UInteger = 112
Console.WriteLine("value = uint1: {0,19}", value.Equals(uint1))
TestObjectForEquality(uint1)
Dim ulong1 As ULong = 112
Console.WriteLine("value = ulong1: {0,18}", value.Equals(ulong1))
TestObjectForEquality(ulong1)
Dim sng1 As Single = 112
Console.WriteLine("value = sng1: {0,21}", value.Equals(sng1))
TestObjectForEquality(sng1)
Dim dbl1 As Double = 112
Console.WriteLine("value = dbl1: {0,21}", value.Equals(dbl1))
TestObjectForEquality(dbl1)
End Sub
Private Sub TestObjectForEquality(obj As Object)
Console.WriteLine("{0} ({1}) = {2} ({3}): {4}",
value, value.GetType().Name,
obj, obj.GetType().Name,
value.Equals(obj))
Console.WriteLine()
End Sub
End Module
' The example displays the following output:
' value = byte1: True
' 112 (Decimal) = 112 (Byte): False
'
' value = short1: True
' 112 (Decimal) = 112 (Int16): False
'
' value = int1: True
' 112 (Decimal) = 112 (Int32): False
'
' value = long1: True
' 112 (Decimal) = 112 (Int64): False
'
' value = sbyte1: True
' 112 (Decimal) = 112 (SByte): False
'
' value = ushort1: True
' 112 (Decimal) = 112 (UInt16): False
'
' value = uint1: True
' 112 (Decimal) = 112 (UInt32): False
'
' value = ulong1: True
' 112 (Decimal) = 112 (UInt64): False
'
' value = sng1: False
' 112 (Decimal) = 112 (Single): False
'
' value = dbl1: False
' 112 (Decimal) = 112 (Double): False
See also
Applies to
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