Multiple selection in TreeView

Question

Hi All I want to implement the Tree View in visual C#in such a way that I can select more than one node at a time what should be the code. Thanks

Niradhip Chakraborty · Answer

You should refer the code given by Scott. Incase you need further assistance you can refer the following URL. http://www.codeproject.com/KB/tree/mwcontrols.aspx http://www.codeproject.com/KB/tree/treeviewms.aspx

tom · Answer

I actually want to do it without checkboxesfor eg we can select multiple folders in windows by pressing ctrl+mouse click. I my application I have to perform drag drop for multiple selected nodes of a tree. How can this be implemented? Thanks.

Scott Lysle · Answer

You could use the checked property on the treeview and allow multiple selections based on the state of the checkbox on each node. You could iterate through the treenodes to see which were checked (you'd really use recursion but here is an example that would iterate through two layers of nodes): StringBuilder sb = new StringBuilder (); foreach ( TreeNode t in treeView1.Nodes) { if (t.Checked == true ) sb.Append(t.Text + Environment .NewLine); if (t.Nodes.Count > 0) { foreach ( TreeNode tt in t.Nodes) { if (tt.Checked == true ) sb.Append(tt.Text + Environment .NewLine); } } } MessageBox .Show(sb.ToString() Checked Nodes );