MenuItem.PerformSelect Methode

Definition

Löst das Select-Ereignis für dieses Menüelement aus.Raises the Select event for this menu item.

public:
 virtual void PerformSelect();
public virtual void PerformSelect ();
abstract member PerformSelect : unit -> unit
override this.PerformSelect : unit -> unit
Public Overridable Sub PerformSelect ()

Beispiele

In diesem Beispiel wählen Sie Programm gesteuert ein Menü Element aus, indem Sie die PerformSelect-Methode verwenden.In this example you programmatically select a menu item by using the PerformSelect method. Zuerst erstellen Sie ein Hauptmenü (mainMenu1) und fügen diesem zwei Menü Elemente hinzu, menuItem1 (File) und menuItem2 (Edit).First, you create a main menu (mainMenu1) and add to it two menu items, menuItem1 (File) and menuItem2 (Edit). Außerdem verwenden Sie das Select-Ereignis, um Daten an den Ereignishandler zu senden, wenn ein Menü Element ausgewählt wird.You also use the Select event to send data to the event handler when a menu item is selected. Anschließend verwenden Sie die PerformSelect-Methode, um das Menü Element File auszuwählen.Then you use the PerformSelect method to select the File menu item. Wenn Sie die Anwendung starten, wird das Menü Element File ausgewählt, und es wird ein Meldungs Feld mit dem Text "das Menü Datei ist ausgewählt" angezeigt.When you start the application, the File menu item is selected, and a message box that contains the text "The File menu is selected." wird auf dem Bildschirm angezeigt.appears on the screen. Das Beispiel erfordert, dass Sie eine Form mit dem Namen Form1erstellt haben.The example requires that you have created a Form named Form1.

public:
   void CreateMyMenu()
   {
      // Create a main menu objects.
      MainMenu^ mainMenu1 = gcnew MainMenu;

      // Create empty menu item objects.
      MenuItem^ menuItem1 = gcnew MenuItem;
      MenuItem^ menuItem2 = gcnew MenuItem;

      // Set the caption of the menu items.
      menuItem1->Text = "&File";
      menuItem2->Text = "&Edit";

      // Add the menu items to the main menu.
      mainMenu1->MenuItems->Add( menuItem1 );
      mainMenu1->MenuItems->Add( menuItem2 );

      // Add functionality to the menu items.
      menuItem1->Select += gcnew System::EventHandler( this, &Form1::menuItem1_Select );
      menuItem2->Select += gcnew System::EventHandler( this, &Form1::menuItem2_Select );

      // Assign mainMenu1 to the form.
      this->Menu = mainMenu1;

      // Select the File menu item.
      menuItem1->PerformSelect();
   }

private:
   void menuItem1_Select( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      MessageBox::Show( "You selected the File menu.", "The Event Information" );
   }

   void menuItem2_Select( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      MessageBox::Show( "You selected the Edit menu.", "The Event Information" );
   }
public void CreateMyMenu()
{
    // Create a main menu object.
    MainMenu mainMenu1 = new MainMenu();

    // Create empty menu item objects.
    MenuItem menuItem1 = new MenuItem();
    MenuItem menuItem2 = new MenuItem();

    // Set the caption of the menu items.
    menuItem1.Text = "&File";
    menuItem2.Text = "&Edit";

    // Add the menu items to the main menu.
    mainMenu1.MenuItems.Add(menuItem1);
    mainMenu1.MenuItems.Add(menuItem2);
    
    // Add functionality to the menu items. 
    menuItem1.Select += new System.EventHandler(this.menuItem1_Select);
    menuItem2.Select += new System.EventHandler(this.menuItem2_Select);
    
    // Assign mainMenu1 to the form.
    this.Menu=mainMenu1;

    // Select the File menu item.
    menuItem1.PerformSelect();
}

private void menuItem1_Select(object sender, System.EventArgs e)
{	
    MessageBox.Show("You selected the File menu.","The Event Information");		
}

private void menuItem2_Select(object sender, System.EventArgs e)
{
    MessageBox.Show("You selected the Edit menu.","The Event Information");		
}
Public Sub CreateMyMenu()
    ' Create a main menu object.
    Dim mainMenu1 As New MainMenu()

    ' Create empty menu item objects.
    Dim menuItem1 As New MenuItem()
    Dim menuItem2 As New MenuItem()

    ' Set the caption of the menu items.
    menuItem1.Text = "&File"
    menuItem2.Text = "&Edit"

    ' Add the menu items to the main menu.
    mainMenu1.MenuItems.Add(menuItem1)
    mainMenu1.MenuItems.Add(menuItem2)

    ' Add functionality to the menu items. 
    AddHandler menuItem1.Select, AddressOf Me.menuItem1_Select
    AddHandler menuItem2.Select, AddressOf Me.menuItem2_Select

    ' Assign mainMenu1 to the form.
    Me.Menu = mainMenu1

    ' Select the File menu item.
    menuItem1.PerformSelect()
End Sub


Private Sub menuItem1_Select(ByVal sender As Object, ByVal e As System.EventArgs)
    MessageBox.Show("You selected the File menu.", "The Event Information")
End Sub


Private Sub menuItem2_Select(ByVal sender As Object, ByVal e As System.EventArgs)
    MessageBox.Show("You selected the Edit menu.", "The Event Information")
End Sub

Hinweise

Mit dieser Methode können Sie das Select-Ereignis erhöhen, ohne Ereignis Informationen an den-Ereignishandler zu übergeben.This method allows you to raise the Select event without passing any event information to the event handler.

Gilt für:

Siehe auch