Problems when using RadGrid in <asp:UpdatePannel>

[Singl Pang]

Hello everyone!
     I have a problem. When I use RadGrid in UpdatePannel, It performance some unexpect exception.
     e.g, When the grid runs "SortCommand", the "SortOrder" can not be change (e.NewSortOrder=Ascending{1}). I click the sort button in header again and again it still keep ascending order.

<asp:UpdatePanel ID="upnlLeaveHistory" runat="server" UpdateMode="Conditional">
    <ContentTemplate>
   ………………
   <telerik:RadGrid ID="rgLeaveHistory" runat="server">
        <MasterTableView>
            <Columns>
               <telerik:GridTemplateColumn DataField="Remarks">
                    <HeaderTemplate>
                        <asp:LinkButton ID="HeaderRgLeaveHistory_Remarks" CommandName="Sort" CommandArgument="Remarks" Text=“Remarks” runat="server"/>
                     </HeaderTemplate>
                     <ItemTemplate>
                          <asp:Label ID="lblItemRgLeaveHistory_Remarks" runat="server" Text='<%#Eval("Remarks")%>' />
                      </ItemTemplate>
                 </telerik:GridTemplateColumn>
               </Columns>
          </MasterTableView>
        <FilterMenu EnableImageSprites="False"></FilterMenu>
     </telerik:RadGrid>

    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="btnAction"/>
        <asp:PostBackTrigger ControlID="ddlLeaveYear"/>
    </Triggers>
</asp:UpdatePanel>

    How could I deal with it? Thanks~!

[Singl Pang]

I updated the tag <trigger> like below, it still cannot change sort order:

<Triggers>
        <asp:PostBackTrigger ControlID="btnAction"/>
        <asp:PostBackTrigger ControlID="ddlLeaveYear"/>
        <asp:AsyncPostBackTrigger ControlID="rgLeaveHistory" EventName="SortCommand" />
    </Triggers>

[Angel Petrov]

Hi Singl,

Based on the information provided I cannot tell for sure what is causing this behavior. Which event do you intercept to change the sort order? I have created a sample project using some of your code. Please review it and tell us what differs in your case.

All the best,
Angel Petrov
the Telerik team