Tree View Problem

Hi all i have written my code to display list of files

private void treeView1_Click(object sender, EventArgs e)
        {
            string strFiletype;
            //path += "fileheader*.txt";
            string[] fileEntries = Directory.GetFiles(path, "fileheader*.txt");
            foreach (string fileName in fileEntries)
            {
                strFiletype = fileName.Substring(fileName.IndexOf("fileheader"));
                treeView1.Nodes.Add(new TreeNode(strFiletype));

                // myTreeNode myNode = (myTreeNode)e.Node;
                // MessageBox.Show("Node selected is " + myNode.FilePath);

            }
        }

But on clicking nodes file are getting appended automatically for multiple times.

And i need another help

My tree view is like this

Root
|-> Child0
|->Child

If i click on Child0 i would like to display the file names under this ..

And whem i am writing this myTreeNode myNode = (myTreeNode)e.Node;

i am getting an error as

Unable to cast object of type 'System.Windows.Forms.TreeNode' to type 'myTreeNode'.

Please can any one modify this and send me

Try this

        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            if (treeView1.SelectedNode.Text == "Child")
            {
                TreeNodeCollection myNodeCollection = treeView1.Nodes;

                string strFiletype;
                string[] fileEntries = Directory.GetFiles(path, "fileheader*.txt");
                TreeNodeCollection myNodeCollection1 = treeView1.SelectedNode.Nodes;
                if (myNodeCollection1.Count > 0)
                {
                    foreach (string fileName in fileEntries)
                    {

                        foreach (TreeNode n1 in myNodeCollection1)
                        {
                            string s = n1.Text;
                            if (n1.Text != fileName.Substring(fileName.IndexOf("fileheader")))
                            {
                                sflag = true;
                            }

                        }
                        if (!sflag)
                        {
                            strFiletype = fileName.Substring(fileName.IndexOf("fileheader"));
                            treeView1.SelectedNode.Nodes.Add(new TreeNode(strFiletype));
                        }
                    }
                }
                else
                {
                    foreach (string fileName in fileEntries)
                    {
                        strFiletype = fileName.Substring(fileName.IndexOf("fileheader"));
                        treeView1.SelectedNode.Nodes.Add(new TreeNode(strFiletype));
                    }
                }
            }

        }

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Dorababu Meka16y ago
Accepted answer
Try this

        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            if (treeView1.SelectedNode.Text == "Child")
            {
                TreeNodeCollection myNodeCollection = treeView1.Nodes;

                string strFiletype;
                string[] fileEntries = Directory.GetFiles(path, "fileheader*.txt");
                TreeNodeCollection myNodeCollection1 = treeView1.SelectedNode.Nodes;
                if (myNodeCollection1.Count > 0)
                {
                    foreach (string fileName in fileEntries)
                    {

                        foreach (TreeNode n1 in myNodeCollection1)
                        {
                            string s = n1.Text;
                            if (n1.Text != fileName.Substring(fileName.IndexOf("fileheader")))
                            {
                                sflag = true;
                            }

                        }
                        if (!sflag)
                        {
                            strFiletype = fileName.Substring(fileName.IndexOf("fileheader"));
                            treeView1.SelectedNode.Nodes.Add(new TreeNode(strFiletype));
                        }
                    }
                }
                else
                {
                    foreach (string fileName in fileEntries)
                    {
                        strFiletype = fileName.Substring(fileName.IndexOf("fileheader"));
                        treeView1.SelectedNode.Nodes.Add(new TreeNode(strFiletype));
                    }
                }
            }

        }
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