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How to show a display value for selected node in treeview in C#?
foreach (DataRow dr in Db.Table("Employee").Rows)
   {
      treeView1.Nodes.Add(
             new TreeNode(dr["Name"].ToString(),
             new TreeNode[] {new TreeNode(dr["EEID"].ToString())}));
   }
      var node = treeView1.SelectedNode.Nodes[0].Text;
      MessageBox.Show(string.Format("You selected: {0}", node));

foreach (DataRow dr in Db.Table("Employee").Rows)
{
  TreeNode tn = new TreeNode();
  tn.Tag = dr["eeid"];
  tn.Text = dr["Name"].ToString();
  treeView1.Nodes.Add(tn);
}
private void treeView1_DoubleClick(object sender, EventArgs e)
{
  MessageBox.Show(treeView1.SelectedNode.Tag.ToString());
}

private void btnGetNodeValue_Click(object sender, EventArgs e)
        {
            string nodeVal=  treeView1.SelectedNode.Text;

        }

TreeView tv = new TreeView();
tv.Nodes.Add(key, text); //where key is your database id value, and text the display

tView.Nodes.Add("Id_0001", "Mr. Dexter");

private void tvView_AfterSelect(object sender, TreeViewEventArgs e)
    {
        TreeNode node = e.Node;
        MessageBox.Show(node.Name + "n" + node.Text);
    }