Determines whether two specified strings have the same value.
Assembly: mscorlib (in mscorlib.dll)
Public Shared Operator = ( _
a As String, _
b As String _
) As Booleanpublic static bool operator ==(
string a,
string b
)public:
static bool operator ==(
String^ a,
String^ b
)static let inline (=)
a:string *
b:string : boolParameters
- a
- Type: System
. . :: . String
The first string to compare, ornull Nothing nullptr a null reference (Nothing in Visual Basic) .
- b
- Type: System
. . :: . String
The second string to compare, ornull Nothing nullptr a null reference (Nothing in Visual Basic) .
Return Value
Type: Systemtrue if the value of a is the same as the value of b; otherwise, false.
The Equality method defines the operation of the equality operator for the String class.
This operator is implemented using the Equals method, which means the comparands are tested for a combination of reference and value equality. This operator performs an ordinal comparison.
.gif) Note |
|---|
The Visual Basic compiler does not resolve the equality operator as a call to the Equality method. Instead, the equality operator wraps a call to the Operators |
The following example demonstrates the equality operator.
// Example for the String Equality operator.
using System;
class EqualityOp
{
public static void Main()
{
Console.WriteLine(
"This example of the String Equality operator\n" +
"generates the following output.\n" );
CompareAndDisplay( "ijkl" );
CompareAndDisplay( "ABCD" );
CompareAndDisplay( "abcd" );
}
static void CompareAndDisplay( string Comparand )
{
String Lower = "abcd";
Console.WriteLine(
"\"{0}\" == \"{1}\" ? {2}",
Lower, Comparand, Lower == Comparand );
}
}
/*
This example of the String Equality operator
generates the following output.
"abcd" == "ijkl" ? False
"abcd" == "ABCD" ? False
"abcd" == "abcd" ? True
*/
// Example for the String Equality operator.
using namespace System;
void CompareAndDisplay( String^ Comparand )
{
String^ Lower = "abcd";
Console::WriteLine( "\"{0}\" == \"{1}\" ? {2}", Lower, Comparand, Lower == Comparand );
}
int main()
{
Console::WriteLine( "This example of the String Equality operator\n"
"generates the following output.\n" );
CompareAndDisplay( "ijkl" );
CompareAndDisplay( "ABCD" );
CompareAndDisplay( "abcd" );
}
/*
This example of the String Equality operator
generates the following output.
"abcd" == "ijkl" ? False
"abcd" == "ABCD" ? False
"abcd" == "abcd" ? True
*/
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.