protected void ddlAssetGroupName_OnSelectedIndexChanged(object sender, EventArgs e)
 {
     if (ddlAssetGroupName1.SelectedValue == "WL")
     {
         DropDownList1.Items.Clear();
         DropDownList1.Items.Insert(0, new System.Web.UI.WebControls.ListItem("Welcome Letter Email Status", "WLES"));
         DropDownList2.Visible = false;
         Label1.Visible        = false;
         DropDownList3.Items.Clear();
         DropDownList3.Items.Insert(0, new System.Web.UI.WebControls.ListItem("Email", "Email"));
     }
     else
     {
         DataSet ds = onlineOrderBackOfficeBo.GetNotificationTypes(ddlAssetGroupName1.SelectedValue);
         if (ds.Tables[0].Rows.Count > 0)
         {
             DropDownList1.DataSource     = ds;
             DropDownList1.DataTextField  = ds.Tables[0].Columns["CNT_NotificationType"].ToString();
             DropDownList1.DataValueField = ds.Tables[0].Columns["CNT_ID"].ToString();
             DropDownList1.DataBind();
             DropDownList1.Items.Insert(0, new System.Web.UI.WebControls.ListItem("Select", "0"));
         }
         else
         {
             DropDownList1.Items.Clear();
         }
     }
 }