System.Web.UI.WebControls Namespace   TreeView Class

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.NET Framework version 2.0

Sets or retireves a value indicating whether lines connecting child nodes to parent nodes are displayed in a TreeView control.

Inline	<asp:treeview showlines = true | false ... >
Script	TreeView.ShowLines [ = true | false ]

This property accepts or returns only a boolean value: true to display lines connecting nodes; otherwise, false. Default value is false.

Use the ShowLines property to specify whether the lines that are connecting child nodes to parent nodes are displayed in a TreeView control.

When this property is set to true, the TreeView control searches the Web-accessible folder that is specified by the LineImagesFolder property for the line images.

NOTE: If the LineImagesFolder property is not set, the TreeView control will use the built-in, default images ( 20 x 20 pixels ).

The following example demonstrates how to use the ShowLines property to display lines connecting nodes in the TreeView control. For this example to work, you should have a set of line images stored in the appopriate folder.

<asp:treeview id = "myTreeView" runat = "server"
   expanddepth=1
   nodestyle-horizontalpadding=3
   lineimagesfolder = "~/shared/images/lines"
   showlines
   onTreeNodePopulate = "PopulateNode">

   <nodes>
      <asp:treenode text = "aspxtreme" populateondemand />
   </nodes>

</asp:treeview>

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