Menu.MenuItemCollection.Contains(MenuItem) Método

public:
 bool Contains(System::Windows::Forms::MenuItem ^ value);

public bool Contains (System.Windows.Forms.MenuItem value);

member this.Contains : System.Windows.Forms.MenuItem -> bool

Public Function Contains (value As MenuItem) As Boolean

Parâmetros

Retornos

Boolean

true se o MenuItem é um membro da coleção; caso contrário, false.

Exemplos

Neste exemplo, você cria um menu principal, myMainMenucom dois MenuItem objetos File e Edit. O File menu tem três itens de submenu, New``Opene Exit. Usando o Contains método, você verifica se a File coleção de menus contém o item Open. Se o item existir, você exibirá o resultado em uma caixa de texto. Este programa exige que você já tenha criado um Form nome Form1.

public:
   void InitializeMenu()
   {
      // Create the MainMenu object.
      MainMenu^ myMainMenu = gcnew MainMenu;
      
      // Create the MenuItem objects.
      MenuItem^ fileMenu = gcnew MenuItem( "&File" );
      MenuItem^ editMenu = gcnew MenuItem( "&Edit" );
      MenuItem^ newFile = gcnew MenuItem( "&New" );
      MenuItem^ openFile = gcnew MenuItem( "&Open" );
      MenuItem^ exitProgram = gcnew MenuItem( "E&xit" );
      
      // Add the MenuItem objects to myMainMenu.
      myMainMenu->MenuItems->Add( fileMenu );
      myMainMenu->MenuItems->Add( editMenu );
      
      // Add three submenus to the File menu.
      fileMenu->MenuItems->Add( newFile );
      fileMenu->MenuItems->Add( openFile );
      fileMenu->MenuItems->Add( exitProgram );
      
      // Assign myMainMenu to the form.
      Menu = myMainMenu;
      
      // Check that the File menu contains the Open menu item.
      if ( fileMenu->MenuItems->Contains( openFile ) )
      {
         MessageBox::Show( "The File menu contains 'Open' " + fileMenu->Text );
      }
   }

public void InitializeMenu()
{
    // Create the MainMenu object.
    MainMenu myMainMenu = new MainMenu();
    
    // Create the MenuItem objects.
    MenuItem fileMenu = new MenuItem("&File");
    MenuItem editMenu = new MenuItem("&Edit");
    MenuItem newFile = new MenuItem("&New");
    MenuItem openFile = new MenuItem("&Open");
    MenuItem exitProgram = new MenuItem("E&xit");
    
    // Add the MenuItem objects to myMainMenu.
    myMainMenu.MenuItems.Add(fileMenu);
    myMainMenu.MenuItems.Add(editMenu);
    
    // Add three submenus to the File menu.
    fileMenu.MenuItems.Add(newFile);
    fileMenu.MenuItems.Add(openFile);
    fileMenu.MenuItems.Add(exitProgram);
    
    // Assign myMainMenu to the form.
    Menu = myMainMenu;
    
    // Check that the File menu contains the Open menu item.
    if (fileMenu.MenuItems.Contains(openFile))
    {
        MessageBox.Show("The File menu contains 'Open' ", fileMenu.Text);
    }
}

Public Sub InitializeMenu()
   ' Create the MainMenu object.
   Dim myMainMenu As New MainMenu()
   
   ' Create the MenuItem objects.
   Dim fileMenu As New MenuItem("&File")
   Dim editMenu As New MenuItem("&Edit")
   Dim newFile As New MenuItem("&New")
   Dim openFile As New MenuItem("&Open")
   Dim exitProgram As New MenuItem("E&xit")
   
   ' Add the MenuItem objects to myMainMenu.
   myMainMenu.MenuItems.Add(fileMenu)
   myMainMenu.MenuItems.Add(editMenu)
   
   ' Add three submenus to the File menu.
   fileMenu.MenuItems.Add(newFile)
   fileMenu.MenuItems.Add(openFile)
   fileMenu.MenuItems.Add(exitProgram)
   
   ' Assign myMainMenu to the form.
   Menu = myMainMenu
   
   ' Check that the File menu contains the Open menu item.
   If fileMenu.MenuItems.Contains(openFile) Then
      MessageBox.Show("The File menu contains 'Open' ", fileMenu.Text)
   End If
End Sub 
'InitializeMenu

Comentários

Esse método permite determinar se um MenuItem membro da coleção é membro antes de tentar executar operações no MenuItem. Você pode usar esse método para confirmar se um MenuItem foi adicionado ou ainda é membro da coleção.

Aplica-se a