String.Inequality(String, String) 演算子

定義

指定した 2 つの文字列の値が異なるかどうかを判断します。Determines whether two specified strings have different values.

public:
 static bool operator !=(System::String ^ a, System::String ^ b);
public static bool operator != (string a, string b);
public static bool operator != (string? a, string? b);
static member op_Inequality : string * string -> bool
Public Shared Operator != (a As String, b As String) As Boolean

パラメーター

a
String

比較する最初の文字列または nullThe first string to compare, or null.

b
String

比較する 2 番目の文字列または nullThe second string to compare, or null.

戻り値

Boolean

true の値が a の値と異なる場合は b。それ以外の場合は falsetrue if the value of a is different from the value of b; otherwise, false.

次の例は、非等値演算子を示しています。The following example demonstrates the inequality operator.

// Example for the String Inequality 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 Inequality operator\n"
   "generates the following output.\n" );
   CompareAndDisplay( "ijkl" );
   CompareAndDisplay( "ABCD" );
   CompareAndDisplay( "abcd" );
}

/*
This example of the String Inequality operator
generates the following output.

"abcd" != "ijkl" ?  True
"abcd" != "ABCD" ?  True
"abcd" != "abcd" ?  False
*/
// Example for the String Inequality operator.
using System;

class InequalityOp 
{
    public static void Main() 
    {
        Console.WriteLine( 
            "This example of the String Inequality 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 Inequality operator
generates the following output.

"abcd" != "ijkl" ?  True
"abcd" != "ABCD" ?  True
"abcd" != "abcd" ?  False
*/

注釈

メソッドは、 Inequality クラスの非等値演算子の操作を定義し String ます。The Inequality method defines the operation of the inequality operator for the String class. これにより、「例」のセクションに示されているようなコードが有効になります。It enables code such as that shown in the Examples section.

Inequalityさらに、演算子は、 Equals(String, String) 序数 (大文字と小文字を区別し、カルチャに依存しない) の比較を実行する静的メソッドを呼び出します。The Inequality operator in turn calls the static Equals(String, String) method, which performs an ordinal (case-sensitive and culture-insensitive) comparison.

注意

Visual Basic コンパイラでは、非等値演算子はメソッドの呼び出しとして解決されません InequalityThe Visual Basic compiler does not resolve the inequality operator as a call to the Inequality method. 代わりに、非等値演算子はメソッドの呼び出しをラップし Operators.CompareString ます。Instead, the inequality operator wraps a call to the Operators.CompareString method.

適用対象