Gets or sets the image list that is used to indicate the state of the TreeView and its nodes.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The state images displayed in the TreeView are 16 x 16 pixels by default. Setting the ImageSize property of the will have no effect on how the images are displayed. However, the state images are resized according to the system DPI setting when the app.config file contains the following entry:
<appSettings> <add key="EnableWindowsFormsHighDpiAutoResizing" value="true" /> </appSettings>
When the CheckBoxes property of a TreeView is set to true and the property is set, each TreeNode that is contained in the TreeView displays the first and second images from the to indicate an unchecked or checked state, respectively. You should set the property before you add nodes to the TreeView to prevent state images being shown at design time for nodes that do not have a state image set.
The following code example demonstrates the property. To run this example, paste the code into a Windows Form and call InitializeCheckTreeView from the form's constructor or Load event handler.
Private checkTreeView As TreeView Private Sub InitializeCheckTreeView() checkTreeView = New TreeView() ' Show check boxes for the TreeView. checkTreeView.CheckBoxes = True ' Create the StateImageList and add two images. checkTreeView.StateImageList = New ImageList() checkTreeView.StateImageList.Images.Add(SystemIcons.Question) checkTreeView.StateImageList.Images.Add(SystemIcons.Exclamation) ' Add some nodes to the TreeView and the TreeView to the form. checkTreeView.Nodes.Add("Node1") checkTreeView.Nodes.Add("Node2") Me.Controls.Add(checkTreeView) End Sub
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.