Expand all rows

This article shows how to expand all rows of RadTreeListView.

There are two options:

Option 1: Set the AutoExpandItems property of RadTreeListView to True. This property sets a value indicating if the hierarchy items should be expanded initially or not. Its default value is False.

Option 2: You can follow these steps to accomplish the same task:

1. Subscribe to the DataLoaded event of the RadTreeListView:

   • C#
   • VB.NET

       treeListView.DataLoaded += new EventHandler<EventArgs>(treeListView_DataLoaded); 

       AddHandler treeListView.DataLoaded, AddressOf treeListView_DataLoaded 

2. Define the DataLoaded handler as follows:

   • C#
   • VB.NET

       void treeListView_DataLoaded(object sender, EventArgs e) 
       { 
           treeListView.DataLoaded -= treeListView_DataLoaded; 
           treeListView.ExpandAllHierarchyItems();    
       } 

       Private Sub treeListView_DataLoaded(sender As Object, e As EventArgs) 
       treeListView.DataLoaded -= treeListView_DataLoaded 
       treeListView.ExpandAllHierarchyItems() 
       End Sub 

Note that we unsubscribe for that event on the first line, so it is not called for each child table. Calling the ExpandAllHierarchyItems will expand all parent rows.

Binding to the IsExpanded property of TreeListViewRow is not fully supported. You can consider using IsExpandedBinding property instead.