How to move node in treeView using two buttons ?

Question

Hello ,
Am starter , and am working on a Winforms application.
I browse an XML file , then I populate treeview in my interface. I want to move selected node in the two sens ( up and down)  using two button ( so not with events , normal drag and drop with mouse ) .
- I select the nod 
- I click on the up button , then the node take the new place ( something like , drop and insert maybe )
I don't know if is possible to affect this events to button or they are another way to do this 
this is my code concerning populating treeView :
private void browseSourceFileBtn_Click(object sender, EventArgs e)
var openSourceFile = openSourceFileDialog.ShowDialog();
if (openSourceFile == DialogResult.OK)
fichierSourcePath.Text = openSourceFileDialog.FileName;
// Connect the XML FILE DATABASE to the application interface
private void button1_Click(object sender, EventArgs e)
if (openSourceFileDialog.FileName == String.Empty)
MessageBox.Show("u should open a file", "Erreur de chargement", MessageBoxButtons.OK, MessageBoxIcon.Error);
else
try
MessageBox.Show("plz wait ");
statusLabel.Text = "Début de chargement du fichier";
var doc = new XmlDocument();
doc.Load(openSourceFileDialog.FileName);
sourceTreeView.Nodes.Clear();
var rootNode = new TreeNode(doc.DocumentElement.Name);
sourceTreeView.Nodes.Add(rootNode);
sourceTreeView.CheckBoxes = true;
sourceTreeView.AllowDrop = true;
DateTime starteTime = DateTime.Now;
BuildNode(doc.DocumentElement, rootNode);
DateTime endTime = DateTime.Now;
TimeSpan duree = endTime - starteTime;
sourceTreeView.ExpandAll();
sourceTreeView.Nodes[0].EnsureVisible();
string chargementTemps = "" + duree.Minutes + "min : " + duree.Seconds + "s : " + duree.Milliseconds + "ms";
statusLabel.Text = "Chargement effectué avec succés en :" + chargementTemps;
catch (Exception)
sourceTreeView.Nodes.Clear();
statusLabel.Text = "Echec de chargement";
thanks u a lot 

Answer 1

Hi Nico68er,
According to your description, you'd like to move up or down the node in TreeView.
By reseraching, I found this post in StackOverFlow is similar with your issue.http://stackoverflow.com/questions/2203975/move-node-in-tree-up-or-down
From this answer.
You can use the following extensions
public static class Extensions
public static void MoveUp(this TreeNode node)
TreeNode parent = node.Parent;
TreeView view = node.TreeView;
if (parent != null)
int index = parent.Nodes.IndexOf(node);
if (index > 0)
parent.Nodes.RemoveAt(index);
parent.Nodes.Insert(index - 1, node);
else if (node.TreeView.Nodes.Contains(node)) //root node
int index = view.Nodes.IndexOf(node);
if (index > 0)
view.Nodes.RemoveAt(index);
view.Nodes.Insert(index - 1, node);
public static void MoveDown(this TreeNode node)
TreeNode parent = node.Parent;
TreeView view = node.TreeView;
if (parent != null)
int index = parent.Nodes.IndexOf(node);
if (index < parent.Nodes.Count -1)
parent.Nodes.RemoveAt(index);
parent.Nodes.Insert(index + 1, node);
else if (view != null && view.Nodes.Contains(node)) //root node
int index = view.Nodes.IndexOf(node);
if (index < view.Nodes.Count - 1)
view.Nodes.RemoveAt(index);
view.Nodes.Insert(index + 1, node);
Child nodes will follow their parents.
You could use this class in your program.
If you want to move the node up. Call the Extensions.MoveUp(this.treeView1.SelectNode)
private void button1_Click(object sender, EventArgs e)
            if (this.treeView1.SelectedNode != null)
                Extensions.MoveUp(this.treeView1.SelectedNode);
If you have any other concern regarding this issue, please feel free to let me know.
Best regards,
Youjun Tang
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