Grid change in page index, page size and filter causing full postback

[Benjamin]

I have added my rad grid inside radwindow and radwindow is place inside asp:UpdatePanel. whenever i click on the page link or change the page size or do filter or sorting, it will cause a full postback and radwindow will be closed. Opening the radwindow again, will reflect the change, like grid will reflect the filter result, etc.

how do i prevent this from happening. 

my code

01.<asp:UpdatePanel ID="uPResponder" runat="server" UpdateMode="Conditional">
02.    <ContentTemplate>
03.        <asp:Button ID="btnOpenModal" runat="server" Text="Select user" />
04.        <asp:Label ID="lblUserCount" runat="server"></asp:Label>
05.        <telerik:RadWindow RenderMode="Lightweight" ID="modalPopup" runat="server" CenterIfModal="true" Width="1400px" Height="650px"  Modal="true"
06.        OffsetElementID="main" Style="z-index: 100001;" OnClientClose="countSelected">
07.            <ContentTemplate>
08.                <telerik:RadGrid RenderMode="Lightweight" ClientIDMode="AutoID" CssClass="table" AutoGenerateColumns="false" ID="gvUsers" AllowFilteringByColumn="True" AllowSorting="True" Width="100%"
09.                AllowPaging="True" runat="server" AllowMultiRowSelection="true" OnPreRender="gvUsers_PreRender" OnItemCommand="gvUsers_ItemCommand" OnNeedDataSource="gvUsers_NeedDataSource">
10.                    <PagerStyle Position="TopAndBottom" Mode="NextPrevAndNumeric" PageSizeControlType="RadDropDownList" />
11.                    <MasterTableView DataKeyNames="LoginName" ShowHeader="true" EnableNoRecordsTemplate="true" ShowHeadersWhenNoRecords="true" NoMasterRecordsText="No user found">
12.                    <Columns>
13.                        <telerik:GridTemplateColumn HeaderStyle-Width="10px" AllowFiltering="false" AllowSorting="false" UniqueName="UserCheckbox">
14.                            <HeaderTemplate>
15.                                <asp:CheckBox ID="chbCheckAll"  AutoPostBack="true" runat="server" OnCheckedChanged="chbAll_CheckedChanged" ClientIDMode="AutoID" />
16.                            </HeaderTemplate>
17.                            <ItemTemplate>
18.                                <asp:CheckBox ID="chbUser" runat="server" AutoPostBack="True" CausesValidation="false" Checked='<%# bool.Parse(Eval("isChecked").ToString()) %>'
19.                                OnCheckedChanged="chbUser_CheckedChanged" ClientIDMode="AutoID" />
20.                            </ItemTemplate>
21.                        </telerik:GridTemplateColumn>
22.                        <telerik:GridBoundColumn DataField="Name" HeaderText="Name" ShowSortIcon="true"
23.                        AutoPostBackOnFilter="true" CurrentFilterFunction="Contains"
24.                        ShowFilterIcon="true">
25.                        </telerik:GridBoundColumn>
26.                    </Columns>
27.                    </MasterTableView>
28.                </telerik:RadGrid>
29.            </ContentTemplate>
30.        </telerik:RadWindow>
31.    </ContentTemplate>
32.</asp:UpdatePanel>

[Doncho]

Hi Benjamin,

Please try to wrap the content of the Window inside an UpdatePanel, instead of wrapping the RadWindow itself:

<telerik:RadWindow RenderMode="Lightweight" ID="RadWindow1" runat="server" CenterIfModal="true" Width="1400px" Height="650px" Modal="true"
    OffsetElementID="main" Style="z-index: 100001;" OnClientClose="countSelected">
    <ContentTemplate>
               
        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
            <ContentTemplate>
                    
                <telerik:RadGrid RenderMode="Lightweight" ClientIDMode="AutoID" ..>
                  .....
                </telerik:RadGrid>

            </ContentTemplate>
        </asp:UpdatePanel>

    </ContentTemplate>
</telerik:RadWindow>

In case, the buttons outside of the Window should be used as AsyncPostBackTriggers you can add them to the Triggers collection in the UpdatePanel declaration. You can find some useful information about Ajaxifying controls in the Understanding AJAX Controls article.

The reason for the experienced behavior is that when the ContentTemplatе of the RadWindow is used, the window itself renders as a direct child of the form element when it is first shown so that it can pop up above the other elements without inheriting any restrictions and limitations. Wrapping the entire RadWindow in an update panel with the concept that the controls inside will perform an AJAX request or will be updated by one will no longer work, as they will not be inside the update panel actually. You can find more on this topic in the How to Use RadWindow with AJAX when using the ContentTemplate section in our documentation.

Please try the suggested above and let me know how it goes.

Kind regards,
Doncho
Progress Telerik