RadGrid in ASCX-Control Problem

[Marco Beyer]

Dear Telerik-Staff,

in my application, I have an aspx-Page which stores a RadGrid. In the RadGrid, each row has a column with a link. Clicking this link, opens a RadWindow which displays a custom user control (ASCX).

Inside this ASCX-Control I have another RadGrid, which displays data. I have implemented this and the window opens with the RadGrid. But when I want to sort (for example) data in the grid which is in the user control, the page only posts back and nothing happens. Let me show you, what I have done:

In my ASPX-Page:

<asp:Content ID="Main" ContentPlaceHolderID="PlaceHolderMain" runat="server">
    <telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" Skin="Windows7">
    </telerik:RadSkinManager>

    <telerik:RadAjaxPanel ID="contentPanel" runat="server">

                                <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" AllowSorting="true" AllowPaging="false"
                                OnNeedDataSource="RadGrid1_NeedDataSource" OnItemCommand="RadGrid1_ItemCommand">
                                <MasterTableView DataKeyNames="ID" ClientDataKeyNames="ID">
                                    <Columns>
                                        <telerik:GridBoundColumn UniqueName="ID" DataField="ID" Visible="false"/>
                                        <telerik:GridBoundColumn DataField="Title" DataType="System.String" HeaderText="Title" SortExpression="Title" HeaderStyle-Width="200px"/>
                                        <telerik:GridBoundColumn DataField="Description" Visible="false"/>

                                        <telerik:GridTemplateColumn UniqueName="MyUniqueColumn" HeaderText="Custom Column" HeaderStyle-Width="150px">
                                            <ItemTemplate>
                                                <asp:Button ID="btnShowUserControl" runat="server" Text="anzeigen" CommandName="CustomCommand"></asp:Button>
                                            </ItemTemplate>
                                        </telerik:GridTemplateColumn>
                                    </Columns>
                                    <SortExpressions>
                                        <telerik:GridSortExpression FieldName="Title" SortOrder="Ascending" />
                                    </SortExpressions>
                                </MasterTableView>

                                <ClientSettings>
                                    <Selecting AllowRowSelect="true" />
                                </ClientSettings>
                            </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    <telerik:RadWindowManager ID="RadWindowManager1" runat="server" EnableViewState="false">
        <Windows>
            <telerik:RadWindow ID="MyWindow" Title="My Title" Modal="true" runat="server" Behaviors="Close" EnableViewState="false"
                ReloadOnShow="true" ShowContentDuringLoad="false" VisibleStatusbar="false" Width="800px" Height="400px">
                <ContentTemplate>
                    <company:MyCustomControl ID="myCustomcontrol" runat="server"></company:MyCustomControl>
                </ContentTemplate>
            </telerik:RadWindow>
        </Windows>
    </telerik:RadWindowManager>
</asp:Content>

The user control has been registered properly on the page head but I have skipped this since it is not relevant to my problem. The Code-behind of my ASPX-Page looks like this (again, only the relevant parts):

protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
        {
            if (e.CommandName == "Customcommand")
            {
                try
                {
                    //Get the requesting item
                    GridDataItem itemToEdit = (GridDataItem)e.Item;

                    //Init the user control
                    MyCustomControl control = (MyCustomControl)MyWindow.ContentContainer.FindControl("myCustomcontrol");
                    control.MakeInit(new Guid(itemToEdit["ID"].Text), IDFromQueryString);

                    MyWindow.VisibleOnPageLoad = true;
                }
                catch { }
            }
        }

Ok, now. That works since the RadWindow shows up and displays the user control. The markup of the ascx-file looks like this:

<telerik:RadAjaxManagerProxy ID="RadAjaxManagerProxy1" runat="server">
    <AjaxSettings>
        <telerik:AjaxSetting AjaxControlID="RadGrid1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />
            </UpdatedControls>
        </telerik:AjaxSetting>
    </AjaxSettings>
</telerik:RadAjaxManagerProxy>
<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" />

<telerik:RadAjaxPanel ID="contentPanel" runat="server">
        <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" AllowSorting="true" AllowPaging="false"
            OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView>
                <Columns>
                    <telerik:GridBoundColumn DataField="FirstID" Visible="false" />
                    <telerik:GridBoundColumn DataField="SecondID" Visible="false" />
            <telerik:GridBoundColumn DataField="User.UserFullName" DataType="System.String" HeaderText="Full name of user" SortExpression="User.UserFullName" HeaderStyle-Width="200px"/>
                </Columns>
                <SortExpressions>
                    <telerik:GridSortExpression FieldName="User.UserFullName" SortOrder="Ascending" />
                </SortExpressions>
            </MasterTableView>
            <ClientSettings>
                <Selecting AllowRowSelect="true" />
            </ClientSettings>
        </telerik:RadGrid>
</telerik:RadAjaxPanel>

The code behind of the ascx-control looks like this:

private static Guid globalGuidID;
private static int globalIntID = 0;

        protected void Page_Load(object sender, EventArgs e)
        {
        }

        public void MakeInit(Guid guidID, int intID)
        {
            globalGuidID = guidID;
            globalIntID = intID;

            RadGrid1.Rebind();
        }

        protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
        {
            if (globalIntID > 0)
            {
                //Create service instance
                DataClient dataService = new DataClient();

                RadGrid1.DataSource = dataService.GetAppropriateData(globalIntID);

                //Close service instance after usage
                dataService.Close();
            }
        }

The Grid displays all the requested information that are retrieved by the "GetAppropriateData"-Method of a WebService instance. But when I try to sort the grid, it behaves as described above: The LoadingPanel is shown, a postback is raised and the grid is reloaded but not sorted.

In general: Any time, a postback is raised inside the RadGrid1 in my usercontrol, this control reloads making any sort, checkbox check, etc. lost.

I have spent so much time on this but I don't get the reason for this issue. When I transfer the code to a "simple" aspx-Page, everything runs as expected, but not for my usercontrol.

Could you please tell me what can cause my issue? I am totally stuck on this.

Best regards,
really appreciate your help,
Marco

[Marco Beyer]

Dear Staff,

I found this out.

It was, because I encapsuled the "MyWindow" inside the RadWindowManager. That obviously was not a good idea. Now I just removed the "MyWindow" from the collestion of windows of the RadWindowManager (Making MyWindow stand alone so to speak) and now it works.

I will come back to you if I encounter additional problems to this issue.

Best regards,
Marco