I refer to the sample provided by Handy on the following link, http://www.intersoftpt.com/Community/WebTreeView/tree-using-database/. I added an asp.net button and asp.net textbox. The text of selected node will be displayed on the textbox when user clicks the button.

I simply use following code in order to get selected node on a button click.

protected void Button1_Click(object sender, EventArgs e)
{
    TextBox1.Text = WebTreeView1.SelectedNode.Text;
}

Please let me know if you have different scenario.

hi Yudi,

thanks for your reply.

Did you check this , it is not working in my example.

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