show own node when no records available

[Mario]

Hello,

I fill a treeview with a ObjectDataSource object. It may be that the ObjectDataSource object does not return a record supplies. Should this be the case, then, a node can be displayed. How can I realize something like that?

<telerik:RadTreeView ID="RadTreeView1" Runat="server" DataFieldID="LayoutID"
                  DataFieldParentID="ParentID" DataSourceID="ObjectDataSource1"
                  DataTextField="LayoutName" DataValueField="LayoutArt"
                  onnodedatabound="RadTreeView1_NodeDataBound"
                    Width="100%" oncontextmenuitemclick="RadTreeView1_ContextMenuItemClick">

Hope you can understand me.

• No record from DataSource - own node to be displayed
• Records available from DataSource - no separate node

Best regards
Reiner

[Bozhidar]

Hello Mario,

You can use the DataBound server event and check there if the tree has any nodes. If not, than you can add one manually. Here's an example:

protected void RadTreeView1_DataBound(object sender, EventArgs e)
{
    if (RadTreeView1.Nodes.Count == 0)
    {
        RadTreeNode node = new RadTreeNode("NodeText");
        RadTreeView1.Nodes.Add(node);
    }
}

 
Regards,
Bozhidar
the Telerik team