Get Treeview Node Value on click

Question

Hello all I am trying to get the clicked nodes value and enter that value into a label. I am sure I am on the right lines using the After_Select event somthing like this. private void treeView2_AfterSelect(object sender EventArgs e) { Label2.Text = TreeView2.SelectedNode.Value; } Unfortunately this returns nothing. So basically say the rootnode of a treeview (Bound to sql server but this makes no difference) was  RT00000215  when the node is clicked to expand it I need the root node string to appear in a label. Could anyone please help me?

Vulpes · Answer

Well the Windows Forms TreeViewEventArgs object has two properties Action and Node. 'Action' tells you whether the event was caused by a TreeNode being selected expanded or collapsed. 'Node' gets the TreeNode that this happened to. In the ASP.NET TreeView you have SelectedNodeChanged TreeNodeExpanded and TreeNodeCollapsed events - so there's no problem getting the action. You can get the selected node with the SelectedNode property and the other two events generate TreeNodeEventArgs objects which have a Node property to tell you which node it happened to.

Chris Johnson · Answer

Exactly what I needed. Cheers man ;-) Should share points with Satyapriya really but I don't think you can do that :-( Thanks everyone! *Edit - Final Solution. void TreeView1_TreeNodeExpanded1( object sender TreeNodeEventArgs e) { TextBox1.Text = e.Node.Text; } Simple when you know how ;-)

Chris Johnson · Answer

Hi both thank you very much for your answers. I should of mentioned however it is a webform I am building. My only problem now is that TreeViewEventArgs is from System.Windows.Forms namespace. After a little surfing I discovered that with a webform I should be using the System.Web.UI.WebControls namespace. Unfortunately this does not contain TreeViewEventArgs any idea what I should use instead of TreeViewEventArgs?

Satyapriya Nayak · Answer

Hi Chris using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void treeView1_AfterSelect(object sender TreeViewEventArgs e) { label1.Text = treeView1.SelectedNode.Text; } private void button1_Click(object sender EventArgs e) { treeView1.Nodes.Add(Student); treeView1.Nodes[0].Nodes.Add(Raj); treeView1.Nodes[0].Nodes.Add(Ravi); treeView1.Nodes[0].Nodes.Add(Rahul); } } } Thanks

Vulpes · Answer

Try: Label2.Text = TreeView2.SelectedNode. Text ;