Hi,
I've been looking for the demo application given on the url:

http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridandwindow/defaultcs.aspx?product=grid

A snippet for that demo:
<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
            <script type="text/javascript">
            function ShowEditForm(id, rowIndex)
            {
                var grid = $find("<%= RadGrid1.ClientID %>");
                
                var rowControl = grid.get_masterTableView().get_dataItems()[rowIndex].get_element();
                grid.get_masterTableView().selectItem(rowControl, true);
                        
                window.radopen("EditFormCS.aspx?EmployeeID=" + id, "UserListDialog");
                return false;
            }
            function ShowInsertForm()
            {
               window.radopen("EditFormCS.aspx", "UserListDialog");
               return false;
            }
            function refreshGrid(arg)
            {
             if(!arg)
             {
             $find("<%= RadAjaxManager1.ClientID %>").ajaxRequest("Rebind");            
                }
                else
                {
             $find("<%= RadAjaxManager1.ClientID %>").ajaxRequest("RebindAndNavigate");            
                }
            }
            function RowDblClick(sender, eventArgs)
            {
             window.radopen("EditFormCS.aspx?EmployeeID=" + eventArgs.getDataKeyValue("EmployeeID"), "UserListDialog");
            }
            </script>
        </telerik:RadCodeBlock>

And I could not understand what form element or event fires the function function refreshGrid(arg)
I think, It should be called in  the onClientClose() of the radwindow.Does the given sample  code has some missed parts?

I am trying to run that sample on Sitefinity. But I could not yet.
Shortly the code that I use:

<telerik:RadCodeBlock  ID="RadCodeBlock1" runat="server">
            <script type="text/javascript">
                function ShowEditForm(id, rowIndex) {

                    window.radopen("UserControls/Pages/PaketKapsaminaAlma.aspx?IstId=" + id, "UserListDialog");
                    return false;
                }
                function ShowInsertForm() {

                    window.radopen("UserControls/Pages/PaketKapsaminaAlma.aspx", "UserListDialog");
                    return false;
                }
                function refreshGrid(arg) {
                    
                        $find("<%= RadAjaxManager1.ClientID %>").ajaxRequest("Rebind");
                }
                
                function RowDblClick(sender, eventArgs) {
                    window.radopen("UserControls/Pages/Istek.PaketKapsaminaAlma?IstId=" + eventArgs.getDataKeyValue("ISTID"), "UserListDialog");
                }
            </script>
        </telerik:RadCodeBlock>

and I call the function refreshGrid(arg) on OnClientClose of RadWindow with ID UserListDialog

<telerik:RadWindowManager ID="RadWindowManager1" runat="server">
    <Windows>
        <telerik:RadWindow ID="UserListDialog" runat="server" Title="Paket kapsamına alma" Height="300px"
            Width="300px" Left="150px" ReloadOnShow="true" ShowContentDuringLoad="false" OnClientClose="refreshGrid"
            Modal="true" />
    </Windows>
</telerik:RadWindowManager>

my AjaxRequest function on cs file is:

protected void RadAjaxManager1_AjaxRequest(object sender, AjaxRequestEventArgs e)
    {
        if (e.Argument == "Rebind")
        {
            BindMyGrid();//this is my function to bind the grid
           // rdgvIstektenAramaSonuclari.MasterTableView.SortExpressions.Clear();
            //rdgvIstektenAramaSonuclari.MasterTableView.GroupByExpressions.Clear();
            //rdgvIstektenAramaSonuclari.Rebind();
         }
    }  

When  I used the recomended lines below  there were no action

            // rdgvIstektenAramaSonuclari.MasterTableView.SortExpressions.Clear();
            //rdgvIstektenAramaSonuclari.MasterTableView.GroupByExpressions.Clear();
            //rdgvIstektenAramaSonuclari.Rebind();

It works great with my BindMyGrid() function which binds the grid with the related datasource of mine. But it works only once :( .

When  I click the linkbutoton on the grid that opens radwindow no problem with it. And when I close the radwindow, it refreshs the grid perfectly..:) And I push the similar linkbutton on the grid to open the radwindow . And  no problem again. But when I update  the data belong  to grid and close the radwindow, it says that:

Microsoft JScript runtime error: 'null' is null or not an object

the problem is on the
 function refreshGrid(arg) {
                    
                        $find("ctl00_cntUst_ctl00_RadAjaxManager1").ajaxRequest();
                }

 code can't find the object for the second onclientclose event of the radwindow. I've looked everywhere on the forums related with that topic. But I have no solution yet.

I think the solution is using a Radajaxmanager on masterpage. But in that case I should reach the radgrid on the user control.

How can I reference a radgrid on a user control from a masterpage in sitefinity.
Any idea?
Regards