How To Add Root Node In Tree View Dynamically Using Asp.net

Question

I Want To Bind DataTable To TreeView.I Have Written Following Code.Its Working Currently,Means It Displays All Data Of DataTable But No Root Node.

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Answer 1

Did you ever get this answered? You were almost there.

What is the name of your TreeView control? Since you never said, I am using treeView1, and modified your code to include that below:

private TreeView treeView1;

private void TreeView_DataBind() {

  treeView1.Nodes.Clear();

  List lstData = GetSPDocuments();
  gvDocuments.DataSource = lstData;
  gvDocuments.DataBind();

  DataTable dt = ConvertToDataTable(lstData);

  TreeNode node1 = new TreeNode("Root");

  treeView1.Nodes.Add(node1); // this is the step you missed

  foreach (DataRow r in dt.Rows)
  {
    int nodeLvl = int.Parse(r["ID"].ToString());
    string nodeParent = "Folders";
    string nodeName = r["Title"].ToString();

    TreeNode tNode = new TreeNode(nodeName);

    ht.Add(nodeLvl.ToString() + nodeName, tNode);

    if (tvDocs.Nodes.Count == 0)
      tvDocs.Nodes.Add(tNode);
    else
    {
      nodeLvl--;
      tvDocs.Nodes.Add(tNode);               
    }
  }

  node1.Expand();

}

Easy peasy!