Hi Shailendra,

Apologize for the late reply. I found a way to select a node after adding it to WebTreeView while setting the AutoPostBack NodeAdd property to true. You were on the right track by using the Select() method, however I may need further information on how you use it.

Anyway, I made a simple sample regarding your issue. There are two ways to do this:
1. Client Side: Call the Select() method from ClientSideEvents property via JavaScript. (See example below)

//webtreeview control

<ISWebTreeView:WebTreeView runat="server" AllowAddNode="True">

    <ClientSideEvents OnNodeAdd="Node_Add" />

    <AutoPostBackSettings OnNodeAdd="true" />

</ISWebTreeView:WebTreeView>

//javascript

function Node_Add(a, newNode, c) {    var treeView = ISGetObject("WebTreeView1");
    newNode.Select();
}

2. Server Side: Call the Select() method from WebTreeView's OnNodeAdd property. (See example below)

//webtreeview control

<ISWebTreeView:WebTreeView OnNodeAdd="WebTreeView1_NodeAdd" AllowAddNode="True">
    ...
    <AutoPostBackSettings OnNodeAdd="true" />
</ISWebTreeView:WebTreeView>

//code behind

protected void WebTreeView1_NodeAdd(object sender, ISNet.WebUI.WebTreeView.WebTreeViewNodeEventArgs e) {
    e.Node.Select();
}

 You could download the sample from the attachment below, feel free to evaluate. Hope this helps.

Best Regards,
Erwin Sanders