Hi all,

Below i m creating a dropdown datatype which reads the Nodes  and populates the dropdown.

Please check my code and tell me where i m doing wrong because i'm getting Null reference exception error

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using umbraco.presentation.nodeFactory;


public partial class EditAdminUser : System.Web.UI.UserControl, umbraco.editorControls.userControlGrapper.IUsercontrolDataEditor
{
    protected string umbracoValue;
    protected void Page_Load(object sender, EventArgs e)
    {
        Fill_DD_Category();
    }   
    public object value
    {
        get
        {
            return umbracoValue;
        }
        set
        {
            umbracoValue = value.ToString();
        }
    }
    public void Fill_DD_Category()
    {
        DataTable dt1 = new DataTable();
        dt1.Columns.Add(new DataColumn("nodeName", typeof(string)));
        dt1.Columns.Add(new DataColumn("nodeID", typeof(string)));
        DataRow dr;
        dr = dt1.NewRow();
        dr["nodeName"] = "Please select category";
        dr["nodeID"] = "0";
        dt1.Rows.Add(dr);

        Node CurrentNode = Node.GetCurrent();
        Nodes nodes = CurrentNode.Children;

        foreach (Node node in nodes)
        {
            dr = dt1.NewRow();
            dr["nodeName"] = node.Name;
            dr["nodeID"] = node.Id;
            dt1.Rows.Add(dr);
        }
        DD_Category.DataSource = dt1;
        DD_Category.DataTextField = "nodeName";
        DD_Category.DataValueField = "nodeID";
        DD_Category.DataBind();
    }
}

---vijay.