[Solved] Maintain the state(userid) of checked records during paging in rad grid?

[Swapnil]

Hi,
how to Maintain the state(userid) of checked records  during paging in rad grid?
Below is my code for reference

<telerik:RadGrid ID="RadGrid1" runat="server" AllowMultiRowSelection="True" AllowPaging="True"
          PageSize="5" AllowSorting="True"
          OnNeedDataSource="RadGrid1_NeedDataSource" CellSpacing="0"
          GridLines="None" ShowGroupPanel="True">
          <PagerStyle Mode="NextPrevAndNumeric" AlwaysVisible="true"></PagerStyle>
          <ClientSettings Selecting-AllowRowSelect="true" AllowDragToGroup="True">
              <Selecting AllowRowSelect="True"></Selecting>
          </ClientSettings>
          <MasterTableView DataKeyNames="UserId">
              <Columns>
                  <telerik:GridClientSelectColumn UniqueName="ClientSelectColumn" />
              </Columns>
              <PagerStyle AlwaysVisible="True"></PagerStyle>
          </MasterTableView>
      </telerik:RadGrid>
      <br />
      <asp:Button ID="Button1" runat="server" Text="Save" OnClick="Button1_Click" Width="130px"
          Height="25px" ValidationGroup="val" />
      <br />

and

public partial class GroupUserCreation : System.Web.UI.Page
{
    Globas obj = new Globas();
    CheckBox chkbox = new CheckBox();
    string GroupId="";


    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {

            DataTable dt1 = obj.GroupDetails();
            cmbgroupname.DataSource = dt1;
            cmbgroupname.DataTextField = "GroupName";
            cmbgroupname.DataValueField = "GroupId";
            cmbgroupname.DataBind();
        }


    }

    protected void Button1_Click(object sender, EventArgs e)
    {

        try
        {
            GroupId = cmbgroupname.SelectedItem.Value.ToString();
            foreach (GridItem item in RadGrid1.MasterTableView.Items)
            {

                GridDataItem dataitem = (GridDataItem)item;
                TableCell cell = dataitem["ClientSelectColumn"];
                CheckBox checkBox = (CheckBox)cell.Controls[0];
                if (checkBox.Checked)
                {
                    int userid = Convert.ToInt32(dataitem.GetDataKeyValue("UserId").ToString());
                    if (GroupId != null)
                    {
                        obj.InsertGroupUserCreation(Convert.ToInt32(GroupId), userid);
                    }
                }

            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

    protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
    {
        DataTable dt = obj.UserDetails();
        RadGrid1.DataSource = dt;

    }



}

Thanks.