ToolStripDropDownMenu.ShowCheckMargin Свойство

Определение

Пространство имен:

System.Windows.Forms

Сборка:

System.Windows.Forms.dll

Получает или задает значение, указывающее, отображается ли поле для флажка слева от ToolStripMenuItem.

public:
 property bool ShowCheckMargin { bool get(); void set(bool value); };

public bool ShowCheckMargin { get; set; }

member this.ShowCheckMargin : bool with get, set

Public Property ShowCheckMargin As Boolean

Значение свойства

Boolean

Значение true, если поле флажка отображается; в противном случае — значение false. Значение по умолчанию — false.

Примеры

В следующем примере кода показано, как создать и инициализировать ContextMenuStrip элемент управления, задав поля проверки и изображения. Полный список кода см. в разделе Практическое руководство. Включение полей проверки и полей изображений в элементах управления ContextMenuStrip.

public Form5()
{
    // Size the form to show three wide menu items.
    this.Width = 500;
    this.Text = "ToolStripContextMenuStrip: Image and Check Margins";

    // Create a new MenuStrip control.
    MenuStrip ms = new MenuStrip();

    // Create the ToolStripMenuItems for the MenuStrip control.
    ToolStripMenuItem bothMargins = new ToolStripMenuItem("BothMargins");
    ToolStripMenuItem imageMarginOnly = new ToolStripMenuItem("ImageMargin");
    ToolStripMenuItem checkMarginOnly = new ToolStripMenuItem("CheckMargin");
    ToolStripMenuItem noMargins = new ToolStripMenuItem("NoMargins");

    // Customize the DropDowns menus.
    // This ToolStripMenuItem has an image margin 
    // and a check margin.
    bothMargins.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)bothMargins.DropDown).ShowImageMargin = true;
    ((ContextMenuStrip)bothMargins.DropDown).ShowCheckMargin = true;

    // This ToolStripMenuItem has only an image margin.
    imageMarginOnly.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)imageMarginOnly.DropDown).ShowImageMargin = true;
    ((ContextMenuStrip)imageMarginOnly.DropDown).ShowCheckMargin = false;

    // This ToolStripMenuItem has only a check margin.
    checkMarginOnly.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)checkMarginOnly.DropDown).ShowImageMargin = false;
    ((ContextMenuStrip)checkMarginOnly.DropDown).ShowCheckMargin = true;

    // This ToolStripMenuItem has no image and no check margin.
    noMargins.DropDown = CreateCheckImageContextMenuStrip();
    ((ContextMenuStrip)noMargins.DropDown).ShowImageMargin = false;
    ((ContextMenuStrip)noMargins.DropDown).ShowCheckMargin = false;

    // Populate the MenuStrip control with the ToolStripMenuItems.
    ms.Items.Add(bothMargins);
    ms.Items.Add(imageMarginOnly);
    ms.Items.Add(checkMarginOnly);
    ms.Items.Add(noMargins);

    // Dock the MenuStrip control to the top of the form.
    ms.Dock = DockStyle.Top;

    // Add the MenuStrip control to the controls collection last.
    // This is important for correct placement in the z-order.
    this.Controls.Add(ms);
}

Public Sub New()
   ' Size the form to show three wide menu items.
   Me.Width = 500
   Me.Text = "ToolStripContextMenuStrip: Image and Check Margins"
   
   ' Create a new MenuStrip control.
   Dim ms As New MenuStrip()
   
   ' Create the ToolStripMenuItems for the MenuStrip control.
   Dim bothMargins As New ToolStripMenuItem("BothMargins")
   Dim imageMarginOnly As New ToolStripMenuItem("ImageMargin")
   Dim checkMarginOnly As New ToolStripMenuItem("CheckMargin")
   Dim noMargins As New ToolStripMenuItem("NoMargins")
   
   ' Customize the DropDowns menus.
   ' This ToolStripMenuItem has an image margin 
   ' and a check margin.
   bothMargins.DropDown = CreateCheckImageContextMenuStrip()
   CType(bothMargins.DropDown, ContextMenuStrip).ShowImageMargin = True
   CType(bothMargins.DropDown, ContextMenuStrip).ShowCheckMargin = True
   
   ' This ToolStripMenuItem has only an image margin.
   imageMarginOnly.DropDown = CreateCheckImageContextMenuStrip()
   CType(imageMarginOnly.DropDown, ContextMenuStrip).ShowImageMargin = True
   CType(imageMarginOnly.DropDown, ContextMenuStrip).ShowCheckMargin = False
   
   ' This ToolStripMenuItem has only a check margin.
   checkMarginOnly.DropDown = CreateCheckImageContextMenuStrip()
   CType(checkMarginOnly.DropDown, ContextMenuStrip).ShowImageMargin = False
   CType(checkMarginOnly.DropDown, ContextMenuStrip).ShowCheckMargin = True
   
   ' This ToolStripMenuItem has no image and no check margin.
   noMargins.DropDown = CreateCheckImageContextMenuStrip()
   CType(noMargins.DropDown, ContextMenuStrip).ShowImageMargin = False
   CType(noMargins.DropDown, ContextMenuStrip).ShowCheckMargin = False
   
   ' Populate the MenuStrip control with the ToolStripMenuItems.
   ms.Items.Add(bothMargins)
   ms.Items.Add(imageMarginOnly)
   ms.Items.Add(checkMarginOnly)
   ms.Items.Add(noMargins)
   
   ' Dock the MenuStrip control to the top of the form.
   ms.Dock = DockStyle.Top
   
   ' Add the MenuStrip control to the controls collection last.
   ' This is important for correct placement in the z-order.
   Me.Controls.Add(ms)
 End Sub

Комментарии

Присвойте свойству ShowCheckMargin значение , true чтобы отобразить флажок, когда пользователь выбирает ToolStripMenuItem.

См. также раздел

• ShowImageMargin
• Практическое руководство. Включение полей флажков и значков для элементов управления ContextMenuStrip