TreeNode.Expanded Property
Assembly: System.Web (in system.web.dll)
public: property Nullable<bool> Expanded { Nullable<bool> get (); void set (Nullable<bool> value); }
/** @property */ public Nullable<boolean> get_Expanded () /** @property */ public void set_Expanded (Nullable<boolean> value)
public function get Expanded () : Nullable<boolean> public function set Expanded (value : Nullable<boolean>)
Property Value
true if the node is expanded; otherwise, false.Use the Expanded property to specify or determine whether the node is expanded.
You can expand and collapse a node by calling the Expand and Collapse methods, respectively. You can also expand and collapse a node and all its child nodes by calling the ExpandAll and CollapseAll methods, respectively.
| Topic | Location |
|---|---|
| How to: Add or Delete TreeView Node Elements (Visual Studio) | Building ASP .NET Web Applications in Visual Studio |
The following code example demonstrates how to use the Expanded property to programmatically expand a node. It initializes all nodes with a depth of one to an expanded state. Notice that when the root node is expanded, its child nodes are already expanded. For this example to work correctly, you must copy the sample XML data below to a file named Book.xml.
The following code is sample XML data for the previous example.
<Book Title="Book Title">
<Chapter Heading="Chapter 1">
<Section Heading="Section 1">
</Section>
<Section Heading="Section 2">
</Section>
</Chapter>
<Chapter Heading="Chapter 2">
<Section Heading="Section 1">
</Section>
</Chapter>
</Book>
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.