private void PopulateTreeView(DataTable dtParent, int parentId, TreeNode treeNode)
{
foreach (DataRow row in dtParent.Rows)
{
TreeNode child = new TreeNode
{
Text = row["Name"].ToString(),
Value = row["Id"].ToString()
};
if (parentId == 0)
{
DirectoryTree directoryTree = new DirectoryTree();
TreeView1.Nodes.Add(child);
DataTable dtChild = directoryTree.GetDataTableFromQuery("select * from dbo.directory where parent_id =" + child.Value);
PopulateTreeView(dtChild, int.Parse(child.Value), child);
}
else
{
DirectoryTree directoryTree = new DirectoryTree();
treeNode.ChildNodes.Add(child);
DataTable dtChild = directoryTree.GetDataTableFromQuery("select * from dbo.directory where parent_id =" + child.Value);
if (dtChild.Rows.Count > 0)
{
PopulateTreeView(dtChild, int.Parse(child.Value), child);
}
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
DirectoryTree directoryTree = new DirectoryTree();
DataTable dtDirectory = directoryTree.GetDataTableFromQuery("select * from dbo.directory where parent_id is null order by id");
PopulateTreeView(dtDirectory, 0, null);
}
}