Allow users to add nodes to treeview (permanently)

In my opinion you should not really add nodes via visual studio unless it is the root node or the tree view is static and will never change.

 

Nodes to tree views should always be added dynamically, its not that hard to do.

 

Try this out by adding a tree view control on a form with NO nodes at all, call it tv and place the code in the form load event then press F5 to run.

 

TreeNode root = new TreeNode("Root");
TreeNode child = new TreeNode("Child Node");
TreeNode sibling = new TreeNode("Sibling");
child.Nodes.Add("Sibling");
root.Nodes.Add(child);
tv.Nodes.Add(root);
 

The tree view in your example above can be dynamically generated from a database table that holds the  information needed to add a node to a parent node and link it to a file anywhere on your system or even on a remote server if that is what you want.

 

root node is the main node of the tree

 

The parent of child node is root node

 

the parent of sibling is child and child's parent is root node and so on...

 

// some code example

 

 

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

/* TEXT FILE

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schedulesoftinstall,\\CS\\NET\\Wiki\\WikiNotes\\schedulesoftinstall.rtf
realmarketdata,\\CS\\NET\\Wiki\\WikiNotes\\realmarketdata.rtf
*/
namespace MoveNext
{
public partial class Form1 : Form
{
TreeNode selectedNode;
TreeNode root;

public Form1()
{
InitializeComponent();
root = new TreeNode("Software");

}

private void Form1_Load(object sender, EventArgs e)
{
tv.Nodes.Add(root);
loadNodes();
}


private void loadNodes()
{
StreamReader sr = new StreamReader(@"C:\Dev\WMI Creator\project\MoveNext\MoveNext\nodes.txt");
String line;
while((line = sr.ReadLine()) != null)
{
String[] s = line.Split(',');
TreeNode n = new TreeNode(s[0]);
n.Tag = s[1];
n.ImageIndex = 0;
root.Nodes.Add(n);

}
}

private void bnAddNode_Click(object sender, EventArgs e)
{
if (selectedNode != null)
{
TreeNode n = new TreeNode(teNodeName.Text);
n.Tag = teFileName.Text;
selectedNode.Nodes.Add(n);
}

}

private void bnOpenFile_Click(object sender, EventArgs e)
{
if (file.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
teFileName.Text = file.FileName;
}
}

private void tv_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{

richTextBox1.Clear();
selectedNode = e.Node;
if (selectedNode.Tag != null)
{
Text = selectedNode.Tag.ToString();
if (File.Exists(selectedNode.Tag.ToString()))
richTextBox1.LoadFile(selectedNode.Tag.ToString(), RichTextBoxStreamType.PlainText);
}

}



}

}