Control.IsMnemonic(Char, String) Control.IsMnemonic(Char, String) Control.IsMnemonic(Char, String) Control.IsMnemonic(Char, String) Method

Definizione

Determina se il carattere specificato è il carattere per i tasti di scelta rapida assegnato al controllo nella stringa specificata.Determines if the specified character is the mnemonic character assigned to the control in the specified string.

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

Parametri

charCode
Char Char Char Char

Carattere da testare.The character to test.

text
String String String String

Stringa in cui effettuare la ricerca.The string to search.

Restituisce

true se il carattere charCode è il carattere per i tasti di scelta rapida assegnato al controllo; in caso contrario, false.true if the charCode character is the mnemonic character assigned to the control; otherwise, false.

Esempi

L'esempio di codice seguente illustra un'estensione della classe pulsante che esegue l'override di ProcessMnemonic metodo da mostrare un comportamento personalizzato.The following code example demonstrates an extension of the button class that overrides the ProcessMnemonic method to exhibit custom behavior. Nell'esempio viene inoltre illustrato l'utilizzo dei CanSelect e IsMnemonic proprietà.The example also demonstrates the use of the CanSelect and IsMnemonic properties. Per eseguire questo esempio, incollare il codice seguente dopo una classe di modulo, nello stesso file.To run this example paste the following code after a form class, in the same file. Aggiungere un pulsante di tipo MnemonicButton al form.Add a button of type MnemonicButton to the form.

// 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.
{
	[UIPermission(
        SecurityAction.Demand, Window = UIPermissionWindow.AllWindows)]
        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

Commenti

Il carattere mnemonico è il carattere immediatamente successivo alla prima istanza di "&" in un String.The mnemonic character is the character immediately following the first instance of "&" in a String.

Sicurezza

UIPermission
per tutte le finestre per classi che ereditano per chiamare questo metodo.for all windows for inheriting classes to call this method. Enumerazione associata: AllWindows pari a UIPermissionWindow.Associated enumeration: AllWindows value of UIPermissionWindow.

Si applica a

Vedi anche