I am trying to make a data aware treeview

[Henry]

I am trying to create a TreeView control that works with an ADO Dataset
DataTable or the new BindingSource stuff in .NET 2.0 to build a Treeview
that is populated.

This is what I came up with so far... I can't run it yet because I don't
have the DataTable source... I still want to get some sort of assessment as
to whether I am heading in the right direction. Here is the code:
================================
using System;

using System.Collections.Generic;

using System.Text;

using System.Windows.Forms;

using System.Data;

namespace WindowsApplication1

{

class NewTree:System.Windows.Forms.TreeView

{

// the data used to build the treeview

protected System.Data.DataTable m_Table;

private System.Data.DataColumn m_KeyColumn;

private System.Data.DataColumn m_ParentKeyColumn;

private System.Data.DataColumn m_TextKeyColumn;

private System.Windows.Forms.TreeNode m_TreeNode;

// Constructor for the class

public NewTree(DataTable m_Table,
string m_KeyColumnName, //name of the primary key column

string m_ParentKeyColumnName, //name of the parent id column

string m_TextColumnName, // name of the column used for text.

int m_StartValue)

{
// Initialize references to columns needed

m_KeyColumn = m_Table.Columns[m_KeyColumnName];

m_ParentKeyColumn = m_Table.Columns[m_ParentKeyColumnName];

m_TextKeyColumn = m_Table.Columns[m_TextColumnName];

// Set initial table filter

string m_filterClause;

m_filterClause = m_ParentKeyColumnName + " = " + m_StartValue.ToString();

m_Table.Select(m_filterClause);

// turn off screen refresh

this.BeginUpdate();

// add relevant root nodes

foreach (DataRow m_thisRow in m_Table.Rows)

{

m_TreeNode = new TreeNode();

m_TreeNode.Tag = m_thisRow.ItemArray.GetValue(m_KeyColumn.Ordinal() );

m_TreeNode.Text = m_thisRow.ItemArray.GetValue(m_TextKeyColumn.Ordin al());

// recursive data function should build a full branch of nodes

buildBranch(m_TreeNode);

this.Nodes.Add(m_TreeNode);
}

// turn on screen refresh

this.EndUpdate();

}

/// <summary>

/// buildBranch is an attempt to build a recursive function to

/// build nodes for a treeview control.

/// I am making the assumption that as a object m_thisNode gets passed

/// by reference. Thus the parent level object should be modified with

/// all its children by the time the root node is added to the treeview

/// nodes collection.

/// </summary>

/// <param name="m_thisNode"></param>

private void buildBranch(TreeNode m_thisNode)

{

TreeNode m_InnerNode;

// set up new filter for table

m_filterClause = m_ParentKeyColumnName + " = " + m_thisNode.Tag.ToString();

m_Table.Select(m_filterClause);

// add child nodes

foreach (DataRow m_thisRow in m_Table.Rows)

{

m_InnerNode = new TreeNode();

m_InnerNode.Tag = m_thisRow.ItemArray.GetValue(m_KeyColumn.Ordinal() );

m_InnerNode.Text = m_thisRow.ItemArray.GetValue(m_TextKeyColumn.Ordin al());

buildBranch(m_InnerNode);

m_thisNode.Nodes.Add(m_InnerNode);

}

}

}

}

==============================

When I dragged the dataset into the application I expected to see references
to a DataSet and DataTables. instead I am seeing BindSources and stuff. I
am not sure how to translate back to the DataTable in order to even test
this.

Your suggestions are welcome.