Menu.MenuItemCollection.IndexOf(MenuItem) Method

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Retrieves the index of a specific item in the collection.

public:
 int IndexOf(System::Windows::Forms::MenuItem ^ value);

public int IndexOf (System.Windows.Forms.MenuItem value);

member this.IndexOf : System.Windows.Forms.MenuItem -> int

Public Function IndexOf (value As MenuItem) As Integer

Parameters

value: MenuItem

The MenuItem to locate in the collection.

Returns

Int32

The zero-based index of the item found in the collection; otherwise, -1.

Examples

The following code example shows how to create a main menu, myMainMenu, with two MenuItem objects, File and Edit. The File menu has three submenu items: New, Open, and Exit. By using the IndexOf method, you retrieve the index of the Exit item in the File menu collection, and then display its value in a message box. This example requires that you have already created a Form named Form1.

public:
   void InitializeMyMenu()
   {
      // 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;
      
      // Retrieve the index of the Exit menu item.
      String^ indexValue = fileMenu->MenuItems->IndexOf( exitProgram ).ToString();
      
      // Display the result in a message box.
      MessageBox::Show( "The index of the Exit menu item = "
         + indexValue, "MenuItem Information" );
   }

public void InitializeMyMenu()
{
    // 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;
    
    // Retrieve the index of the Exit menu item.
     string indexValue = 
    fileMenu.MenuItems.IndexOf(exitProgram).ToString();
    // Display the result in a message box.
    MessageBox.Show("The index of the Exit menu item = "
            + indexValue, "MenuItem Information");
}

Public Sub InitializeMyMenu()
   ' 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
   
   ' Retrieve the index of the Exit menu item.
   Dim indexValue As String = fileMenu.MenuItems.IndexOf(exitProgram).ToString()
   ' Display the result in a message box.
   MessageBox.Show("The index of the Exit menu item = " + indexValue, "MenuItem Information")
End Sub

Applies to

Zdieľať cez