C# TreeView Node Expand / Collapse Events

 

 

Ejemplo

TreeNode node = null; And in your expand event, assign the expanded node to the variable: private void treeView1_AfterExpand(object sender, TreeViewEventArgs e) { node = e.Node; } And when a node is collapsed make it null: private void treeView1_AfterCollapse(object sender, TreeViewEventArgs e) { node = null; } And after loading data to the view do the following check: if (node != null) { foreach (TreeNode n in treeView1.Nodes) { if (n.Text == node.Text) { n.Expand(); break; } } }