MenuItem.IsSubmenuOpen Property

Gets or sets a value that indicates whether the submenu of the MenuItem is open. This is a dependency property.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

[BindableAttribute(true)]
[BrowsableAttribute(false)]
public bool IsSubmenuOpen { get; set; }
<object IsSubmenuOpen="bool" .../>

Property Value

Type: System.Boolean
true if the submenu of the MenuItem is open; otherwise, false. The default is false.

When IsSubmenuOpen is set to true, mouse capture is set to the MenuItem and its subtree.

The following example shows how to open a submenu of a MenuItem. In this example, the MenuItem called fileMenu contains a MenuItem called recentFiles that has a submenu. When fileMenu is opened, the SubmenuOpened event is raised and the FileMenu_Opened event handler opens the submenu of recentFiles.

<Menu>
  <MenuItem Name="fileMenu"
            Header="_File"
            SubmenuOpened="FileMenu_Opened">

    <MenuItem Name="recentFiles" 
              Header="Recent files">

      <MenuItem Header="file 1"
                IsCheckable="True"/>

      <MenuItem Header="file 2"
                IsCheckable="True"/>
    </MenuItem>
    <Separator/>
    <MenuItem Name="closeMenu" 
              Header="Close all Files"/>
  </MenuItem>
</Menu>
private void FileMenu_Opened(object sender, RoutedEventArgs e)
{
    if (sender == e.Source)
    {
        recentFiles.IsSubmenuOpen = true;
        Keyboard.Focus(recentFiles);
    }
}

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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