ToolBarButton.DropDownMenu Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

ToolBarButton.cs

Mendapatkan atau mengatur menu yang akan ditampilkan di tombol bilah alat drop-down.

public:
 property System::Windows::Forms::Menu ^ DropDownMenu { System::Windows::Forms::Menu ^ get(); void set(System::Windows::Forms::Menu ^ value); };

[System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ReferenceConverter))]
public System.Windows.Forms.Menu DropDownMenu { get; set; }

[<System.ComponentModel.TypeConverter(typeof(System.ComponentModel.ReferenceConverter))>]
member this.DropDownMenu : System.Windows.Forms.Menu with get, set

Public Property DropDownMenu As Menu

Nilai Properti

Menu

yang ContextMenu akan ditampilkan di tombol bilah alat drop-down. Defaultnya adalah null.

Atribut

TypeConverterAttribute

Pengecualian

ArgumentException

Objek yang ditetapkan bukan .ContextMenu

Contoh

Contoh kode berikut membuat ToolBar dan tiga ToolBarButton kontrol, menetapkan tombol ke toolbar, dan mengatur beberapa properti umum tombol. Kode ini mengharuskan , ToolTipImageListdan Form telah dibuat dan ImageList memiliki setidaknya satu Image yang ditetapkan untuknya.

public:
   void InitializeMyToolBar()
   {
      // Create the ToolBar, ToolBarButton controls, and menus.
      ToolBarButton^ toolBarButton1 = gcnew ToolBarButton( "Open" );
      ToolBarButton^ toolBarButton2 = gcnew ToolBarButton;
      ToolBarButton^ toolBarButton3 = gcnew ToolBarButton;
      ToolBar^ toolBar1 = gcnew ToolBar;
      MenuItem^ menuItem1 = gcnew MenuItem( "Print" );
      array<MenuItem^>^ temp1 = {menuItem1};
      System::Windows::Forms::ContextMenu^ contextMenu1 =
         gcnew System::Windows::Forms::ContextMenu( temp1 );
      
      // Add the ToolBarButton controls to the ToolBar.
      toolBar1->Buttons->Add( toolBarButton1 );
      toolBar1->Buttons->Add( toolBarButton2 );
      toolBar1->Buttons->Add( toolBarButton3 );
      
      // Assign an ImageList to the ToolBar and show ToolTips.
      toolBar1->ImageList = imageList1;
      toolBar1->ShowToolTips = true;
      
      /* Assign ImageIndex, ContextMenu, Text, ToolTip, and 
         Style properties of the ToolBarButton controls. */
      toolBarButton2->Style = ToolBarButtonStyle::Separator;
      toolBarButton3->Text = "Print";
      toolBarButton3->Style = ToolBarButtonStyle::DropDownButton;
      toolBarButton3->ToolTipText = "Print";
      toolBarButton3->ImageIndex = 0;
      toolBarButton3->DropDownMenu = contextMenu1;
      
      // Add the ToolBar to a form.
      Controls->Add( toolBar1 );
   }

public void InitializeMyToolBar()
 {
    // Create the ToolBar, ToolBarButton controls, and menus.
    ToolBarButton toolBarButton1 = new ToolBarButton("Open");
    ToolBarButton toolBarButton2 = new ToolBarButton();
    ToolBarButton toolBarButton3 = new ToolBarButton();
    ToolBar toolBar1 = new ToolBar();
    MenuItem menuItem1 = new MenuItem("Print");
    ContextMenu contextMenu1 = new ContextMenu(new MenuItem[]{menuItem1});

    // Add the ToolBarButton controls to the ToolBar.
    toolBar1.Buttons.Add(toolBarButton1);
    toolBar1.Buttons.Add(toolBarButton2);
    toolBar1.Buttons.Add(toolBarButton3);
 
    // Assign an ImageList to the ToolBar and show ToolTips.
    toolBar1.ImageList = imageList1;
    toolBar1.ShowToolTips = true;
 
    /* Assign ImageIndex, ContextMenu, Text, ToolTip, and 
       Style properties of the ToolBarButton controls. */
    toolBarButton2.Style = ToolBarButtonStyle.Separator;
    toolBarButton3.Text = "Print";
    toolBarButton3.Style = ToolBarButtonStyle.DropDownButton;
    toolBarButton3.ToolTipText = "Print";
    toolBarButton3.ImageIndex = 0;
    toolBarButton3.DropDownMenu = contextMenu1;
 
    // Add the ToolBar to a form.
    Controls.Add(toolBar1);
 }

Public Sub InitializeMyToolBar()
    ' Create the ToolBar, ToolBarButton controls, and menus.
    Dim toolBarButton1 As New ToolBarButton("Open")
    Dim toolBarButton2 As New ToolBarButton()
    Dim toolBarButton3 As New ToolBarButton()
    Dim toolBar1 As New ToolBar()
Dim menuItem1 As New MenuItem("Print")
Dim contextMenu1 As New ContextMenu(New MenuItem(){menuItem1})
    
    ' Add the ToolBarButton controls to the ToolBar.
    toolBar1.Buttons.Add(toolBarButton1)
    toolBar1.Buttons.Add(toolBarButton2)
    toolBar1.Buttons.Add(toolBarButton3)
    
    ' Assign an ImageList to the ToolBar and show ToolTips.
    toolBar1.ImageList = imageList1
    toolBar1.ShowToolTips = True
    
    ' Assign ImageIndex, ContextMenu, Text, ToolTip, and
    ' Style properties of the ToolBarButton controls. 
    toolBarButton2.Style = ToolBarButtonStyle.Separator
    toolBarButton3.Text = "Print"
    toolBarButton3.Style = ToolBarButtonStyle.DropDownButton
    toolBarButton3.ToolTipText = "Print"
    toolBarButton3.ImageIndex = 0
    toolBarButton3.DropDownMenu = contextMenu1
    
    ' Add the ToolBar to a form.
    Controls.Add(toolBar1)
End Sub

Keterangan

Anda dapat menentukan yang ContextMenu akan ditampilkan saat tombol drop-down diklik. Properti ini tidak digunakan kecuali Style nilai properti diatur ke ToolBarButtonStyle.DropDownButton.

Nota

DropDownMenu Meskipun properti didefinisikan sebagai Menu jenis, Anda harus menetapkannya ContextMenu agar ditampilkan dengan benar. Jika Anda membuat kelas turunan Anda sendiriMenuItem, Anda harus menetapkan objek tersebut ContextMenu ke ContextMenu dan menetapkan ke DropDownMenu properti .

Lihat juga

• MenuItem