Winform: How to copy treenode collection in clipboard with Tag property

Question

Suppose i have a treeview and a particular node has few sub node and sub node has another nodes etc or particular node has no sub nodes. in my case i have assign a object to tag property of each node.

Now i want when user select any node and click button then i want to store that node & its all sub nodes in clipboard. i tried a code example which is working but Tag property getting null.

So please advise how could i store nodes in clipboard with tag property ?

i test this code.

    private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
            {
                if (treeView1.SelectedNode != null)
                {
                    TreeNode paste = treeView1.SelectedNode;
                    IDataObject data = Clipboard.GetDataObject();
                    if (data.GetDataPresent(typeof(TreeNode)))
                    {
                        TreeNode element = (TreeNode)data.GetData(typeof(TreeNode));
                        TreeNode tn = new TreeNode();
                        tn.Text = element.Text;
                        tn.Name = element.Name;
                        foreach (TreeNode temp in element.Nodes)
                        {
                            TreeNode newTn = new TreeNode(temp.Text);
                            tn.Nodes.Add(newTn);
                        }
                        if (paste.Parent != null)
                        {
                            paste.Parent.Nodes.Insert(paste.Index + 1, tn);

                        }
                        else
                        {
                            this.treeView1.Nodes.Insert(paste.Index + 1, tn);
                        }
                    }
                }
            }



            private void cutToolStripMenuItem_Click(object sender, EventArgs e)
            {
                TreeNode node = this.treeView1.SelectedNode;
                if (node != null)
                {
                    Clipboard.SetDataObject(node, true);
                    this.treeView1.Nodes.Remove(node);
                }

            }

please tell me a easy to store nodes and its tag property in clipboard. thanks

Answer 1

Hi @Sudip Bhatt ,

Thank you for posting this issue in Microsoft Q&A forum.

According to your code snippets, please try to add these two code lines:

tn.Tag = element.Tag;

newTn.Tag = temp.Tag;

And the codes should be looked like this:

if (data.GetDataPresent(typeof(TreeNode)))  
{  
     TreeNode element = (TreeNode)data.GetData(typeof(TreeNode));  
     TreeNode tn = new TreeNode();  
     tn.Text = element.Text;  
     tn.Name = element.Name;  
     tn.Tag = element.Tag;  
     foreach (TreeNode temp in element.Nodes)  
     {  
           TreeNode newTn = new TreeNode(temp.Text);  
           newTn.Tag = temp.Tag;  
           tn.Nodes.Add(newTn);  
     }  

     //……  

}  

The result:

Sincerely,
Tianyu

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