Hi, The Sort Event is not firing inside my grid view. The function gridViewBillHistory_Sorting(object sender, GridViewSortEventArgs e) never gets executed. I am calling this function as below DataTable dtBillHistory = getTable(lSelectedAccountNumber); gridViewBillHistory.DataSource = dtBillHistory; gridViewBillHistory.DataBind(); gridViewBillHistory.AllowSorting = true; gridViewBillHistory.EnableSortingAndPagingCallbacks = true; gridViewBillHistory.EnableViewState = true; gridViewBillHistory.Sorting += new GridViewSortEventHandler(gridViewBillHistory_Sorting); this.Controls.Add(gridViewBillHistory); The following is the code written inside the .acsx file <%@ Control Language="C#" AutoEventWireup="true" Inherits="NWC.Internet.Controls.BillHistory, NWC.Internet.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=8617c92b638e1ccc" %> <script runat="server"> protected void gridViewBillHistory_SelectedIndexChanged(object sender, EventArgs e) { } </script> <table border="0"> <tr> <td style="margin-left: 40px"> <asp:Label ID="lblAccountNumber" runat="server" Text="<%$ Resources:NWCLiterals, AccountNumber %>"></asp:Label> </td> <td style="margin-left: 40px"> <asp:DropDownList ID="ddAccountNumber" runat="server" CssClass="lblNorm" AutoPostBack="true" Width="200" OnSelectedIndexChanged="ddAccountNumber_SelectedIndexChanged"> </asp:DropDownList> </td> </tr> <tr> <td style="margin-left: 40px"> <asp:GridView ID="gridViewBillHistory" runat="server" AllowSorting="true" AllowPaging="true" PageSize="1" OnSelectedIndexChanged="gridViewBillHistory_SelectedIndexChanged" AutoGenerateColumns="false" OnSorting="gridViewBillHistory_Sorting"> <Columns> <asp:BoundField DataField="Bill Number" HeaderText="Bill Number" SortExpression="Bill Number"> </asp:BoundField> <asp:BoundField DataField="Issue Date" HeaderText="Issue Date" SortExpression="Issue Date" > </asp:BoundField> <asp:BoundField DataField="Amount" HeaderText="Amount" SortExpression="Amount"></asp:BoundField> <asp:BoundField DataField="Payment Date" HeaderText="Payment Date" SortExpression="Payment Date"> </asp:BoundField> <asp:BoundField DataField="Payment Status" HeaderText="Payment Status" SortExpression="Payment Status"> </asp:BoundField> </Columns> </asp:GridView> </td> </tr> </table> Please advice. The Complete code for the .cs file is given below. namespace NWC.Internet.Controls { public class BillHistory:UserControl { protected DropDownList ddAccountNumber; GridView gridViewBillHistory = new GridView(); long lSelectedAccountNumber; BillManager IBillManager; List<NWC.Internet.DAL.BusinessObject.BillHistory> spBillHistoryList; List<NWC.Internet.DAL.BusinessObject.CustomerAccount> spCustomerAccountRecords; CustomerManager ICustomerManager; DataTable dt; protected void Page_Load(object sender, EventArgs e) { try { spBillHistoryList = new List<NWC.Internet.DAL.BusinessObject.BillHistory>(); spCustomerAccountRecords = new List<NWC.Internet.DAL.BusinessObject.CustomerAccount>(); string languageCode=string.Empty; if(CultureInfo.CurrentCulture.Equals("ar-SA")) { languageCode="ARA"; } else { languageCode="ENG"; } ICustomerManager = new CustomerManager(); spCustomerAccountRecords = ICustomerManager.GetCustomerAccount(1219634666, "ENG"); ListItem listSelectedAccountNumber; if (!IsPostBack) { foreach (NWC.Internet.DAL.BusinessObject.CustomerAccount element in spCustomerAccountRecords) { string strSelectedAccountNumber = element.accountID.ToString(); listSelectedAccountNumber = new ListItem(strSelectedAccountNumber, strSelectedAccountNumber); ddAccountNumber.Items.Add(listSelectedAccountNumber); } } lSelectedAccountNumber = Convert.ToInt64(ddAccountNumber.SelectedValue); DataTable dtBillHistory = getTable(lSelectedAccountNumber); gridViewBillHistory.DataSource = dtBillHistory; gridViewBillHistory.DataBind(); gridViewBillHistory.AllowSorting = true; gridViewBillHistory.EnableSortingAndPagingCallbacks = true; gridViewBillHistory.EnableViewState = true; gridViewBillHistory.Sorting += new GridViewSortEventHandler(gridViewBillHistory_Sorting); this.Controls.Add(gridViewBillHistory); } catch(Exception ex) { } } protected void gridViewBillHistory_Sorting(object sender, GridViewSortEventArgs e) { string sortExpression = e.SortExpression; ViewState["z_sortexpresion"] = e.SortExpression; if (GridViewSortDirection == SortDirection.Ascending) { GridViewSortDirection = SortDirection.Descending; SortGridView(sortExpression, "DESC"); } else { GridViewSortDirection = SortDirection.Ascending; SortGridView(sortExpression, "ASC"); } } public SortDirection GridViewSortDirection { get { if (ViewState["sortDirection"] == null) ViewState["sortDirection"] = SortDirection.Ascending; return (SortDirection)ViewState["sortDirection"]; } set { ViewState["sortDirection"] = value; } } private void SortGridView(string sortExpression, string direction) { lSelectedAccountNumber = Convert.ToInt64(ddAccountNumber.SelectedValue); DataTable dtable = getTable(lSelectedAccountNumber); DataView dv = new DataView(dtable); dv.Sort = sortExpression + " " + direction; this.gridViewBillHistory.DataSource = dv; gridViewBillHistory.DataBind(); } public DataTable getTable(long lSelectedAccountNumber) { dt = new DataTable(); dt.Columns.Add(new DataColumn("Bill Number", typeof(long))); dt.Columns.Add(new DataColumn("Issue Date", typeof(DateTime))); dt.Columns.Add(new DataColumn("Amount", typeof(long))); dt.Columns.Add(new DataColumn("Payment Date", typeof(DateTime))); dt.Columns.Add(new DataColumn("Payment Status", typeof(string))); IBillManager = new BillManager(); spBillHistoryList = IBillManager.GetBillHistory(lSelectedAccountNumber, "ENG"); foreach (NWC.Internet.DAL.BusinessObject.BillHistory element in spBillHistoryList) { DataRow drBillHistory = dt.NewRow(); drBillHistory["Bill Number"] = element.billID; drBillHistory["Issue Date"] = element.issueDate; drBillHistory["Amount"] = element.billBalance; drBillHistory["Payment Date"] = element.paymentDate; drBillHistory["Payment Status"] = element.paymentStatus; dt.Rows.Add(drBillHistory); } return dt; } protected void ddAccountNumber_SelectedIndexChanged(object sender, EventArgs e) { lSelectedAccountNumber = Convert.ToInt64(ddAccountNumber.SelectedValue); DataTable dtBillHistory = getTable(lSelectedAccountNumber); gridViewBillHistory.DataSource = dtBillHistory; gridViewBillHistory.DataBind(); this.Controls.Add(gridViewBillHistory); } }