Drag and Drop XML file to Treeview?

Question

If I drag a xml file and drop it on the treeview, can a xml file be displayed? like this
Thank you !

Answer 1

@LooBi , Welcome to Microsoft Q&A, you could use DragOver event and DragDrop event to show the xml in the treeview when you drop the xml file to the treeview control.

Here is a code example you could refer to.

 public Form1()  
    {  
        InitializeComponent();  
        treeView1.AllowDrop = true;  
    }  
  
    private void treeView1_DragDrop(object sender, DragEventArgs e)  
    {  
        string filePath=string.Empty;  
        if (e.Data.GetDataPresent(DataFormats.FileDrop))  
        {  
            string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);  
            filePath = files[0];  
        }  
        XmlDocument xDoc = new XmlDocument();  
        xDoc.Load(filePath);  
        treeView1.Nodes.Clear();  
        treeView1.Nodes.Add(new TreeNode(xDoc.DocumentElement.Name));  
        TreeNode tNode = new TreeNode();  
        tNode = (TreeNode)treeView1.Nodes[0];  
        addTreeNode(xDoc.DocumentElement, tNode);  
        treeView1.ExpandAll();  
          
    }  
  
  
    private void addTreeNode(XmlNode xmlNode, TreeNode treeNode)  
    {  
        XmlNode xNode;  
        TreeNode tNode;  
        XmlNodeList xNodeList;  
        if (xmlNode.HasChildNodes)  
        {  
            xNodeList = xmlNode.ChildNodes;  
            for (int x = 0; x <= xNodeList.Count - 1; x++)  
            {  
                xNode = xmlNode.ChildNodes[x];  
                string nodetext = xNode.Name + ": ";  
                Console.WriteLine(nodetext);  
                if (!nodetext.Contains("text"))  
                {  
                    if (xNode.Attributes.Count > 0)  
                    {  
                        for (int i = 0; i < xNode.Attributes.Count; i++)  
                        {  
                            nodetext += xNode.Attributes[i].Name + " - " + xNode.Attributes[i].Value;  
                        }  
                    }  
                }  
  
  
  
                treeNode.Nodes.Add(new TreeNode(nodetext));  
                tNode = treeNode.Nodes[x];  
                addTreeNode(xNode, tNode);  
            }  
        }  
        else  
        {  
            string nodetext = xmlNode.Name + ": ";  
            Console.WriteLine(nodetext);  
            if (!nodetext.Contains("text"))  
            {  
                if (xmlNode.Attributes.Count > 0)  
                {  
                    for (int i = 0; i < xmlNode.Attributes.Count; i++)  
                    {  
                        nodetext += xmlNode.Attributes[i].Name + " - " + xmlNode.Attributes[i].Value;  
                    }  
                }  
            }  
            else  
            {  
                nodetext = xmlNode.InnerText;  
            }  
            treeNode.Text = nodetext;  
        }  
  
    }  
    private void treeView1_DragOver(object sender, DragEventArgs e)  
    {  
        if (e.Data.GetDataPresent(DataFormats.FileDrop))  
            e.Effect = DragDropEffects.Link;  
        else  
            e.Effect = DragDropEffects.None;  
    }  

Result:

Best Regards,
Jack

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