Int64.Equals Method
Important
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Returns a value indicating whether this instance is equal to a specified object or Int64.
Equals(Int64) |
Returns a value indicating whether this instance is equal to a specified Int64 value. |
Equals(Object) |
Returns a value indicating whether this instance is equal to a specified object. |
- Source:
- Int64.cs
- Source:
- Int64.cs
- Source:
- Int64.cs
Returns a value indicating whether this instance is equal to a specified Int64 value.
public:
virtual bool Equals(long obj);
public bool Equals (long obj);
override this.Equals : int64 -> bool
Public Function Equals (obj As Long) As Boolean
Parameters
Returns
true
if obj
has the same value as 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 obj
parameter to an object.
Notes to Callers
Compiler overload resolution may account for an apparent difference in the behavior of the two Equals(Int64) method overloads. If an implicit conversion between the obj
argument and an Int64 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int64) method. Otherwise, they call the Equals(Object) method, which always returns false
if its obj
argument is not an Int64 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte, SByte, Int16, UInt16, Int32, and UInt32 values, the first comparison returns true
because the compiler automatically performs a widening conversion and calls the Equals(Int64) method, whereas the second comparison returns false
because the compiler calls the Equals(Object) method.
using System;
public class Example
{
static long value = 112;
public static void Main()
{
byte byte1= 112;
Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1));
TestObjectForEquality(byte1);
short short1 = 112;
Console.WriteLine("value = short1: {0,15}", value.Equals(short1));
TestObjectForEquality(short1);
int int1 = 112;
Console.WriteLine("value = int1: {0,17}", value.Equals(int1));
TestObjectForEquality(int1);
sbyte sbyte1 = 112;
Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1));
TestObjectForEquality(sbyte1);
ushort ushort1 = 112;
Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1));
TestObjectForEquality(ushort1);
uint uint1 = 112;
Console.WriteLine("value = uint1: {0,17}", value.Equals(uint1));
TestObjectForEquality(uint1);
decimal dec1 = 112m;
Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1));
TestObjectForEquality(dec1);
double dbl1 = 112;
Console.WriteLine("value = dbl1: {0,19}", 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 (Int64) = 112 (Byte): False
//
// value = short1: True
// 112 (Int64) = 112 (Int16): False
//
// value = int1: True
// 112 (Int64) = 112 (Int32): False
//
// value = sbyte1: True
// 112 (Int64) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Int64) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Int64) = 112 (UInt32): False
//
// value = dec1: False
// 112 (Int64) = 112 (Decimal): False
//
// value = dbl1: False
// 112 (Int64) = 112 (Double): False
let value = 112
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(int byte1),15}"
testObjectForEquality byte1
let short1 = 112s
printfn $"value = short1: {value.Equals(int short1),15}"
testObjectForEquality short1
let int1 = 112
printfn $"value = int1: {value.Equals(int int1),17}"
testObjectForEquality int1
let sbyte1 = 112y
printfn $"value = sbyte1: {value.Equals(int sbyte1),15}"
testObjectForEquality sbyte1
let ushort1 = 112us
printfn $"value = ushort1: {value.Equals(int ushort1),15}"
testObjectForEquality ushort1
let uint1 = 112u
printfn $"value = uint1: {value.Equals(int uint1),17}"
testObjectForEquality uint1
let dec1 = 112M
printfn $"value = dec1: {value.Equals(int dec1),20}"
testObjectForEquality dec1
let dbl1 = 112.0
printfn $"value = dbl1: {value.Equals(int dbl1),19}"
testObjectForEquality dbl1
// The example displays the following output:
// value = byte1: True
// 112 (Int64) = 112 (Byte): False
//
// value = short1: True
// 112 (Int64) = 112 (Int16): False
//
// value = int1: True
// 112 (Int64) = 112 (Int32): False
//
// value = sbyte1: True
// 112 (Int64) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Int64) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Int64) = 112 (UInt32): False
//
// value = dec1: False
// 112 (Int64) = 112 (Decimal): False
//
// value = dbl1: False
// 112 (Int64) = 112 (Double): False
Module Example
Dim value As Int64 = 112
Public Sub Main()
Dim byte1 As Byte = 112
Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))
TestObjectForEquality(byte1)
Dim short1 As Short = 112
Console.WriteLine("value = short1: {0,15}", value.Equals(short1))
TestObjectForEquality(short1)
Dim int1 As Integer = 112
Console.WriteLine("value = int1: {0,17}", value.Equals(int1))
TestObjectForEquality(int1)
Dim sbyte1 As SByte = 112
Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1))
TestObjectForEquality(sbyte1)
Dim ushort1 As UShort = 112
Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1))
TestObjectForEquality(ushort1)
Dim uint1 As UInteger = 112
Console.WriteLine("value = uint1: {0,17}", value.Equals(uint1))
TestObjectForEquality(uint1)
Dim dec1 As Decimal = 112d
Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1))
TestObjectForEquality(dec1)
Dim dbl1 As Double = 112
Console.WriteLine("value = dbl1: {0,19}", 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 (Int64) = 112 (Byte): False
'
' value = short1: True
' 112 (Int64) = 112 (Int16): False
'
' value = int1: True
' 112 (Int64) = 112 (Int32): False
'
' value = sbyte1: True
' 112 (Int64) = 112 (SByte): False
'
' value = ushort1: True
' 112 (Int64) = 112 (UInt16): False
'
' value = uint1: True
' 112 (Int64) = 112 (UInt32): False
'
' value = dec1: False
' 112 (Int64) = 112 (Decimal): False
'
' value = dbl1: False
' 112 (Int64) = 112 (Double): False
Applies to
.NET 9 e altre versioni
Prodotto | Versioni |
---|---|
.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 | 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 |
- Source:
- Int64.cs
- Source:
- Int64.cs
- Source:
- Int64.cs
Returns a value indicating whether this instance is equal to a specified object.
public:
override bool Equals(System::Object ^ obj);
public override bool Equals (object obj);
public override bool Equals (object? obj);
override this.Equals : obj -> bool
Public Overrides Function Equals (obj As Object) As Boolean
Parameters
- obj
- Object
An object to compare with this instance.
Returns
true
if obj
is an instance of an Int64 and equals the value of this instance; otherwise, false
.
Examples
The following code example illustrates the use of Equals
in the context of Int64
, comparing two long values and returning true
if they represent the same number, or false
if they do not.
Int64 myVariable1 = 80;
Int64 myVariable2 = 80;
// Get and display the declaring type.
Console::WriteLine( "\nType of 'myVariable1' is ' {0}' and value is : {1}", myVariable1.GetType(), myVariable1 );
Console::WriteLine( "Type of 'myVariable2' is ' {0}' and value is : {1}", myVariable2.GetType(), myVariable2 );
// Compare 'myVariable1' instance with 'myVariable2' Object.
if ( myVariable1.Equals( myVariable2 ) )
Console::WriteLine( "\nStructures 'myVariable1' and 'myVariable2' are equal" );
else
Console::WriteLine( "\nStructures 'myVariable1' and 'myVariable2' are not equal" );
Int64 myVariable1 = 80;
Int64 myVariable2 = 80;
// Get and display the declaring type.
Console.WriteLine("\nType of 'myVariable1' is '{0}' and"+
" value is :{1}",myVariable1.GetType(), myVariable1);
Console.WriteLine("Type of 'myVariable2' is '{0}' and"+
" value is :{1}",myVariable2.GetType(), myVariable2);
// Compare 'myVariable1' instance with 'myVariable2' Object.
if( myVariable1.Equals( myVariable2 ) )
Console.WriteLine( "\nStructures 'myVariable1' and "+
"'myVariable2' are equal");
else
Console.WriteLine( "\nStructures 'myVariable1' and "+
"'myVariable2' are not equal");
let myVariable1 = 80L
let myVariable2 = 80L
// Get and display the declaring type.
printfn $"\nType of 'myVariable1' is '{myVariable1.GetType()}' and value is: {myVariable1}"
printfn $"\nType of 'myVariable2' is '{myVariable2.GetType()}' and value is: {myVariable2}"
// Compare 'myVariable1' instance with 'myVariable2' Object.
if myVariable1.Equals myVariable2 then
printfn "\nStructures 'myVariable1' and 'myVariable2' are equal"
else
printfn "\nStructures 'myVariable1' and 'myVariable2' are not equal"
Dim myVariable1 As Int64 = 80
Dim myVariable2 As Int64 = 80
' Get and display the declaring type.
Console.WriteLine(ControlChars.NewLine + "Type of 'myVariable1' is '{0}' and" + _
" value is :{1}", myVariable1.GetType().ToString(), myVariable1.ToString())
Console.WriteLine("Type of 'myVariable2' is '{0}' and" + _
" value is :{1}", myVariable2.GetType().ToString(), myVariable2.ToString())
' Compare 'myVariable1' instance with 'myVariable2' Object.
If myVariable1.Equals(myVariable2) Then
Console.WriteLine(ControlChars.NewLine + "Structures 'myVariable1' and " + _
"'myVariable2' are equal")
Else
Console.WriteLine(ControlChars.NewLine + "Structures 'myVariable1' and " + _
"'myVariable2' are not equal")
End If
Notes to Callers
Compiler overload resolution may account for an apparent difference in the behavior of the two Equals(Int64) method overloads. If an implicit conversion between the obj
argument and an Int64 is defined and the argument is not typed as an Object, compilers perform an implicit conversion and call the Equals(Int64) method. Otherwise, they call the Equals(Object) method, which always returns false
if its obj
argument is not an Int64 value. The following example illustrates the difference in behavior between the two method overloads. In the case of the Byte, SByte, Int16, UInt16, Int32, and UInt32 values, the first comparison returns true
because the compiler automatically performs a widening conversion and calls the Equals(Int64) method, whereas the second comparison returns false
because the compiler calls the Equals(Object) method.
using System;
public class Example
{
static long value = 112;
public static void Main()
{
byte byte1= 112;
Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1));
TestObjectForEquality(byte1);
short short1 = 112;
Console.WriteLine("value = short1: {0,15}", value.Equals(short1));
TestObjectForEquality(short1);
int int1 = 112;
Console.WriteLine("value = int1: {0,17}", value.Equals(int1));
TestObjectForEquality(int1);
sbyte sbyte1 = 112;
Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1));
TestObjectForEquality(sbyte1);
ushort ushort1 = 112;
Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1));
TestObjectForEquality(ushort1);
uint uint1 = 112;
Console.WriteLine("value = uint1: {0,17}", value.Equals(uint1));
TestObjectForEquality(uint1);
decimal dec1 = 112m;
Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1));
TestObjectForEquality(dec1);
double dbl1 = 112;
Console.WriteLine("value = dbl1: {0,19}", 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 (Int64) = 112 (Byte): False
//
// value = short1: True
// 112 (Int64) = 112 (Int16): False
//
// value = int1: True
// 112 (Int64) = 112 (Int32): False
//
// value = sbyte1: True
// 112 (Int64) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Int64) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Int64) = 112 (UInt32): False
//
// value = dec1: False
// 112 (Int64) = 112 (Decimal): False
//
// value = dbl1: False
// 112 (Int64) = 112 (Double): False
let value = 112
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(int byte1),15}"
testObjectForEquality byte1
let short1 = 112s
printfn $"value = short1: {value.Equals(int short1),15}"
testObjectForEquality short1
let int1 = 112
printfn $"value = int1: {value.Equals(int int1),17}"
testObjectForEquality int1
let sbyte1 = 112y
printfn $"value = sbyte1: {value.Equals(int sbyte1),15}"
testObjectForEquality sbyte1
let ushort1 = 112us
printfn $"value = ushort1: {value.Equals(int ushort1),15}"
testObjectForEquality ushort1
let uint1 = 112u
printfn $"value = uint1: {value.Equals(int uint1),17}"
testObjectForEquality uint1
let dec1 = 112M
printfn $"value = dec1: {value.Equals(int dec1),20}"
testObjectForEquality dec1
let dbl1 = 112.0
printfn $"value = dbl1: {value.Equals(int dbl1),19}"
testObjectForEquality dbl1
// The example displays the following output:
// value = byte1: True
// 112 (Int64) = 112 (Byte): False
//
// value = short1: True
// 112 (Int64) = 112 (Int16): False
//
// value = int1: True
// 112 (Int64) = 112 (Int32): False
//
// value = sbyte1: True
// 112 (Int64) = 112 (SByte): False
//
// value = ushort1: True
// 112 (Int64) = 112 (UInt16): False
//
// value = uint1: True
// 112 (Int64) = 112 (UInt32): False
//
// value = dec1: False
// 112 (Int64) = 112 (Decimal): False
//
// value = dbl1: False
// 112 (Int64) = 112 (Double): False
Module Example
Dim value As Int64 = 112
Public Sub Main()
Dim byte1 As Byte = 112
Console.WriteLine("value = byte1: {0,15}", value.Equals(byte1))
TestObjectForEquality(byte1)
Dim short1 As Short = 112
Console.WriteLine("value = short1: {0,15}", value.Equals(short1))
TestObjectForEquality(short1)
Dim int1 As Integer = 112
Console.WriteLine("value = int1: {0,17}", value.Equals(int1))
TestObjectForEquality(int1)
Dim sbyte1 As SByte = 112
Console.WriteLine("value = sbyte1: {0,15}", value.Equals(sbyte1))
TestObjectForEquality(sbyte1)
Dim ushort1 As UShort = 112
Console.WriteLine("value = ushort1: {0,15}", value.Equals(ushort1))
TestObjectForEquality(ushort1)
Dim uint1 As UInteger = 112
Console.WriteLine("value = uint1: {0,17}", value.Equals(uint1))
TestObjectForEquality(uint1)
Dim dec1 As Decimal = 112d
Console.WriteLine("value = dec1: {0,20}", value.Equals(dec1))
TestObjectForEquality(dec1)
Dim dbl1 As Double = 112
Console.WriteLine("value = dbl1: {0,19}", 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 (Int64) = 112 (Byte): False
'
' value = short1: True
' 112 (Int64) = 112 (Int16): False
'
' value = int1: True
' 112 (Int64) = 112 (Int32): False
'
' value = sbyte1: True
' 112 (Int64) = 112 (SByte): False
'
' value = ushort1: True
' 112 (Int64) = 112 (UInt16): False
'
' value = uint1: True
' 112 (Int64) = 112 (UInt32): False
'
' value = dec1: False
' 112 (Int64) = 112 (Decimal): False
'
' value = dbl1: False
' 112 (Int64) = 112 (Double): False
See also
Applies to
.NET 9 e altre versioni
Prodotto | Versioni |
---|---|
.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 |
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