Control.IsMnemonic(Char, String) Metode

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Menentukan apakah karakter yang ditentukan adalah karakter mnemonic yang ditetapkan ke kontrol dalam string yang ditentukan.

public:
 static bool IsMnemonic(char charCode, System::String ^ text);

public static bool IsMnemonic (char charCode, string? text);

static member IsMnemonic : char * string -> bool

Public Shared Function IsMnemonic (charCode As Char, text As String) As Boolean

Parameter

charCode

Char

Karakter yang akan diuji.

text

String

String yang akan dicari.

Mengembalikan

Boolean

true charCode jika karakter adalah karakter mnemonik yang ditetapkan ke kontrol; jika tidak, false.

Contoh

Contoh kode berikut menunjukkan ekstensi kelas tombol yang mengambil ProcessMnemonic alih metode untuk menunjukkan perilaku kustom. Contohnya juga menunjukkan penggunaan CanSelect properti dan IsMnemonic . Untuk menjalankan contoh ini, tempelkan kode berikut setelah kelas formulir, dalam file yang sama. Tambahkan tombol jenis MnemonicButton ke formulir.

// This button is a simple extension of the button class that overrides
// the ProcessMnemonic method.  If the mnemonic is correctly entered,  
// the message box will appear and the click event will be raised.  
// This method makes sure the control is selectable and the 
// mnemonic is correct before displaying the message box
// and triggering the click event.
public ref class MyMnemonicButton: public Button
{
protected:
   bool ProcessMnemonic( char inputChar )
   {
      if ( CanSelect && IsMnemonic( inputChar, this->Text ) )
      {
         MessageBox::Show( "You've raised the click event "
         "using the mnemonic." );
         this->PerformClick();
         return true;
      }

      return false;
   }

};

// This button is a simple extension of the button class that overrides
// the ProcessMnemonic method.  If the mnemonic is correctly entered,  
// the message box will appear and the click event will be raised.  
public class MyMnemonicButton : Button
{
    // This method makes sure the control is selectable and the 
    // mneumonic is correct before displaying the message box
    // and triggering the click event.
    protected override bool ProcessMnemonic(char inputChar)
    {
        if (CanSelect && IsMnemonic(inputChar, this.Text))
        {
            MessageBox.Show("You've raised the click event " +
                "using the mnemonic.");
            this.PerformClick();
            return true;
        }
        return false;
    }
}

' This button is a simple extension of the button class that overrides
' the ProcessMnemonic method.  If the mnemonic is correctly entered,  
' the message box will appear and the click event will be raised.  
Public Class MyMnemonicButton
    Inherits Button

    ' This method makes sure the control is selectable and the 
    ' mneumonic is correct before displaying the message box
    ' and triggering the click event.
    <System.Security.Permissions.UIPermission( _
    System.Security.Permissions.SecurityAction.Demand, Window:=UIPermissionWindow.AllWindows)> _
    Protected Overrides Function ProcessMnemonic( _
        ByVal inputChar As Char) As Boolean

        If (CanSelect And IsMnemonic(inputChar, Me.Text)) Then
            MessageBox.Show("You've raised the click event " _
                & "using the mnemonic.")
            Me.PerformClick()
            Return True
        End If
        Return False
    End Function

End Class

Keterangan

Karakter mnemonic adalah karakter segera setelah instans pertama "&" dalam String.

Lihat juga

• ProcessMnemonic(Char)