Issue with DetailTable Binding at using server side also

[umesh]

I m trying to Bind DetailTable as per your demo example but unable to do that.
DetailTable is Expanding but does not show any data while datasource is available.



protected void RadGrid_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
    {
        if (!e.IsFromDetailTable)
        {
            try
            {
                DemomailViewings.DataSource = ViewingHelperX.GetViewingsForCurrentUser(UserID, DateStart, DateEnd, Session_ID);
            }
            catch (Exception ex)
            {
                // log error
            }        
        }
    }

    public void RadGrid_DetailTableDataBind(object source, Telerik.Web.UI.GridDetailTableDataBindEventArgs e)
    {      
        try
        {
            if (e.DetailTableView.Name == "GroupViewing")
            {
                GridDataItem dataItem = (GridDataItem)e.DetailTableView.ParentItem;
                int ContactID = Convert.ToInt32(dataItem.GetDataKeyValue("ContactID"));
                e.DetailTableView.DataSource = ContactHelper.GetContacts(ContactID);
            }
        }
        catch (Exception ex)
        {
            // log error
        }        
    }





 <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
                <AjaxSettings>
                    <telerik:AjaxSetting AjaxControlID="RadGrid">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="RadGrid"></telerik:AjaxUpdatedControl>
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                </AjaxSettings>
            </telerik:RadAjaxManager>

               <telerik:RadGrid ID="RadGrid" runat="server" Width="95%" ShowHeadersWhenNoRecords="true"
                    ShowStatusBar="true" AutoGenerateColumns="False"
                    PageSize="50" AllowSorting="True" AllowMultiRowSelection="False" AllowPaging="True"
               
                OnDetailTableDataBind="RadGrid_DetailTableDataBind" OnNeedDataSource="RadGrid_NeedDataSource">
                    <PagerStyle Mode="NumericPages"></PagerStyle>
                    <MasterTableView Width="100%" DataKeyNames="ContactID" AllowSorting="True" HierarchyLoadMode="ServerOnDemand">
                    <DetailTables>
                            <telerik:GridTableView AutoGenerateColumns="false" runat="server" Name="GroupViewing" DataKeyNames="Id" AllowFilteringByColumn="false"
                             AllowSorting="false">
                                <ParentTableRelation>
                                    <telerik:GridRelationFields DetailKeyField="Id" MasterKeyField="ContactID" />
                                </ParentTableRelation>
                                <PagerStyle Visible="false" />
                                <Columns>
                                    <telerik:GridBoundColumn DataField="FirstName" HeaderText="First Name" />
                                    <telerik:GridBoundColumn DataField="AccountId" HeaderText="Company Name" />
                                    <telerik:GridBoundColumn DataField="Title" HeaderText="Title" />
                                    <telerik:GridBoundColumn DataField="Phone" HeaderText="Phone" />
                                </Columns>
                            </telerik:GridTableView>
                        </DetailTables>
                        <Columns>

                            <telerik:GridTemplateColumn SortExpression="InGroup" HeaderText="Group Viewing">
                                <ItemTemplate>
                                    <asp:Image ID="grpImage" runat="server" />
                                </ItemTemplate>
                            </telerik:GridTemplateColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" SortExpression="FirstName" DataField="FirstName"
                                HeaderText="FirstName">
                            </telerik:GridBoundColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" SortExpression="LastName" DataField="LastName"
                                HeaderText="LastName">
                            </telerik:GridBoundColumn>
                            <telerik:GridTemplateColumn SortExpression="email" UniqueName="Email" HeaderText="Email">
                                <ItemTemplate>
                                    <a id="contactLink" style="cursor: pointer" runat="server"></a>
                                </ItemTemplate>
                            </telerik:GridTemplateColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" SortExpression="Title" AllowSorting="true"
                                DataField="Title" HeaderText="Title">
                            </telerik:GridBoundColumn>
                            <telerik:GridBoundColumn DataField="Phone" SortExpression="Phone" AllowSorting="true"
                                HeaderText="Phone">
                            </telerik:GridBoundColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" SortExpression="CompanyName" AllowSorting="true"
                                DataField="CompanyName" HeaderText="CompanyName">
                            </telerik:GridBoundColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" AllowSorting="true" DataField="SessionTitle"
                                SortExpression="title" HeaderText="Video Viewed">
                            </telerik:GridBoundColumn>
                            <telerik:GridDateTimeColumn ShowSortIcon="true" AllowSorting="true" SortExpression="SentDate"
                                DataFormatString="{0:MM/dd/yyyy}" DataField="SentDate" HeaderText="Sent Date">
                            </telerik:GridDateTimeColumn>
                            <telerik:GridDateTimeColumn ShowSortIcon="true" AllowSorting="true" SortExpression="ViewedDate"
                                DataFormatString="{0:MM/dd/yyyy}" DataField="ViewedDate" HeaderText="ViewedDate">
                            </telerik:GridDateTimeColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" AllowSorting="true" DataField="DurationText"
                                SortExpression="Duration" HeaderText="Duration">
                            </telerik:GridBoundColumn>
                            <telerik:GridBoundColumn ShowSortIcon="true" AllowSorting="true" SortExpression="location"
                                DataField="location" HeaderText="Location">
                            </telerik:GridBoundColumn>
                        </Columns>
                    </MasterTableView>

                </telerik:RadGrid>

[Princy]

Hi Umesh,

Please set your ParentTableRelation as follows and check if the issue exists:

ASPX:

<ParentTableRelation>
   <telerik:GridRelationFields DetailKeyField="ContactID" MasterKeyField="ContactID" />
</ParentTableRelation>

Thanks,
Princy