Hello all,

I followed a tutorial I found on the web:  http://mosesofegypt.net/post/Building-a-grouping-Grid-with-GridView-and-ASPNET-AJAX-toolkit-CollapsiblePanel.aspx

Here is what I have  An UpdatePanel with a Gridview in it, inside of that GridView's ItemTemplate is my control panel (+/-), a panel with a FormView in it and another GridView, and the CollapsiblePanelExtender.  It all works okay until I change the mode of the FormView.  I've got both an ItemTemplate and EditItemTemplate defined for the FV, and if I set the default mode I can get either template to show, but the command button to switch the FV's mode causes the FV to disappear completely.  I know the panel with the FV in it is still visible because I have a GridView in there that I can see, but the FV itself goes away no matter which Mode I start it in.

Any ideas?

Thanks!

        <asp:SqlDataSource ID="sdsWeeks" runat="server" 
                ConnectionString="<%$ ConnectionStrings:CARDS %>" 
                SelectCommand="GetWeeks" SelectCommandType="StoredProcedure">
                <SelectParameters>
                    <asp:SessionParameter Name="SiteID" SessionField="SiteID" Type="Int32" />
                </SelectParameters>
        </asp:SqlDataSource>
        <cc1:ToolkitScriptManager ID="tsm" runat="server"></cc1:ToolkitScriptManager>
        <asp:UpdatePanel ID="pnlUpdate" runat="server">            
            <ContentTemplate>        
                <asp:Gridview ID="gvScreeningLog" runat="server" AutoGenerateColumns="False" 
                                CellPadding="4" ForeColor="#333333" GridLines="None"
                                Font-Names="Verdana" Font-Size="Small"
                                DataSourceID="sdsWeeks" DataKeyNames="ScreeningWeekID" 
                                OnRowCreated="gvScreeningLog_RowCreated"
                                AllowPaging="True" PageSize="5" Width="400px">   
                    <Columns>                                    
                        <asp:TemplateField HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left" HeaderText="Week Beginning">
                            <ItemTemplate>
                                <asp:SqlDataSource ID="sdsLogDetails" runat="server" 
                                        ConnectionString="<%$ ConnectionStrings:CARDS %>" 
                                        SelectCommand="GetScreeningLogDetails" SelectCommandType="StoredProcedure">
                                        <SelectParameters>
                                            <asp:Parameter Name="ScreeningWeekID" Type="Int32" />
                                        </SelectParameters>     
                                </asp:SqlDataSource>   
                                <asp:SqlDataSource ID="sdsWeekDetails" runat="server" 
                                        ConnectionString="<%$ ConnectionStrings:CARDS %>" 
                                        SelectCommand="GetWeekDetails" SelectCommandType="StoredProcedure"
                                        UpdateCommand="UpdateWeekDetails" UpdateCommandType="StoredProcedure">
                                        <SelectParameters>
                                            <asp:Parameter Name="ScreeningWeekID" Type="Int32" />
                                        </SelectParameters> 
                                        <UpdateParameters>
                                            <asp:SessionParameter Name="Username" Type="String" SessionField="Username" />
                                        </UpdateParameters>    
                                </asp:SqlDataSource>                                     
                                    <asp:Panel ID="panWeeks" runat="server">
                                        <asp:Image ID="imgPlus" runat="server" ImageUrl="~/images/plus.png" />
                                        <span><%# Eval("WeekBeginning") %> ( <%# Eval("TotalCount") %> Total)</span>
                                    </asp:Panel>
                                    <asp:Panel ID="panLog" runat="server">
                                        <table>
                                            <tr>
                                                <td style="width: 25px">
                                                </td>
                                                <td>                                                
                                                    <asp:FormView ID="fvWeekDetail" runat="server"
                                                        DataSourceID="sdsWeekDetails" DataKeyNames="ScreeningWeekID"
                                                        ForeColor="Black" style="border-bottom: solid 1px DarkOliveGreen">
                                                        <ItemTemplate>
                                                            <table>
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblTotalCount" runat="server" Text="Total # of Patients Admitted:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Label ID="lblTotalCountData" runat="server" Text='<%# Eval("TotalCount") %>'></asp:Label>
                                                                    </td>
                                                                </tr>
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblOver12" runat="server" Text="Total # of Patients Over 12 Years:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Label ID="lblOver12Data" runat="server" Text='<%# Eval("TotalOver12") %>'></asp:Label>
                                                                    </td>
                                                                </tr>
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblIntubated" runat="server" Text="Total # of Patients Intubated:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Label ID="lblIntubatedData" runat="server" Text='<%# Eval("TotalIntubated") %>'></asp:Label>
                                                                    </td>
                                                                </tr>                                                                                                                                
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblARDS" runat="server" Text="Total # of Patients with ALI/ARDS:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Label ID="lblARDSData" runat="server" Text='<%# Eval("TotalARDS") %>'></asp:Label>
                                                                    </td>
                                                                </tr>   
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblDirect" runat="server" Text="Total # of Patients with Direct ALI/ARDS:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Label ID="lblDirectData" runat="server" Text='<%# Eval("TotalDirect") %>'></asp:Label>
                                                                    </td>
                                                                </tr>    
                                                                <tr align="right">
                                                                    <td>
                                                                    </td>
                                                                    <td>                                                                       
                                                                        <asp:Button ID="cmdEditWeek" runat="server" Text="Edit" CommandName="Edit"
                                                                        BackColor="#F7F6F3" BorderColor="#E6E2D8" Width="50px"
                                                                        BorderStyle="Outset" BorderWidth="1px" Font-Names="Verdana" 
                                                                        Font-Size="Small" ForeColor="DarkOliveGreen" />                                                                    
                                                                    </td>
                                                                </tr>                                                                                                                            
                                                            </table>
                                                        </ItemTemplate>                                                        
                                                        <EditItemTemplate>
                                                            <table>
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblTotalCount" runat="server" Text="Total # of Patients Admitted:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Textbox ID="tbTotalCount" runat="server" Text='<%# Bind("TotalCount") %>' Width="25px"></asp:Textbox>
                                                                    </td>
                                                                </tr>
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblOver12" runat="server" Text="Total # of Patients Over 12 Years:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Textbox ID="tbOver12" runat="server" Text='<%# Bind("TotalOver12") %>' Width="25px"></asp:Textbox>
                                                                    </td>
                                                                </tr>
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblIntubated" runat="server" Text="Total # of Patients Intubated:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Textbox ID="tbIntubated" runat="server" Text='<%# Bind("TotalIntubated") %>' Width="25px"></asp:Textbox>
                                                                    </td>
                                                                </tr>                                                                                                                                
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblARDS" runat="server" Text="Total # of Patients with ALI/ARDS:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Textbox ID="tbARDS" runat="server" Text='<%# Bind("TotalARDS") %>' Width="25px"></asp:Textbox>
                                                                    </td>
                                                                </tr>   
                                                                <tr>
                                                                    <td>
                                                                        <asp:Label ID="lblDirect" runat="server" Text="Total # of Patients with Direct ALI/ARDS:" Font-Bold="true"></asp:Label>                                                                        
                                                                    </td>
                                                                    <td>
                                                                        <asp:Textbox ID="tbDirect" runat="server" Text='<%# Bind("TotalDirect") %>' Width="25px"></asp:Textbox>
                                                                    </td>
                                                                </tr>     
                                                                <tr align="right">
                                                                    <td>
                                                                    </td>
                                                                    <td>                                                                   
                                                                    </td>
                                                                </tr>                                                                                                                                                                                            
                                                            </table>                                                        
                                                        </EditItemTemplate>
                                                    </asp:FormView>                                
                                                    <asp:GridView ID="gvLog" runat="server" CellPadding="4" 
                                                        ForeColor="#333333" GridLines="None"
                                                        DataSourceID="sdsLogDetails" AutoGenerateColumns="False"
                                                        DataKeyNames="ScreeningID" >
                                                        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                                                        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
                                                        <Columns>
                                                            <asp:BoundField DataField="ReasonExcluded" HeaderText="Reason Excluded" 
                                                                SortExpression="ReasonExcluded" />
                                                            <asp:BoundField DataField="ReasonExcludedDD" HeaderText="Reason Excluded DD" 
                                                                SortExpression="ReasonExcludedDD" />
                                                        </Columns>
                                                        <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
                                                        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                                                        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                                                        <EditRowStyle BackColor="#999999" />
                                                        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
                                                    </asp:GridView>
                                                </td>
                                            </tr>
                                        </table>
                                    </asp:Panel> 
                                    
                                    <cc1:collapsiblepanelextender ID="cpeLog" runat="server"
                                        TargetControlID="panLog"
                                        ExpandControlID="panWeeks" CollapseControlID="panWeeks"
                                        CollapsedSize="0" Collapsed="True"
                                        AutoCollapse="False" AutoExpand="False" ScrollContents="false" 
                                        ImageControlID="imgPlus"
                                        ExpandedImage="~/images/minus.png" CollapsedImage="~/images/plus.png"
                                        ExpandDirection="Vertical"                                     >
                                    </cc1:collapsiblepanelextender>  
                            </ItemTemplate>
                            <HeaderStyle HorizontalAlign="Left" />
                            <ItemStyle HorizontalAlign="Left" />
                        </asp:TemplateField>            
                    </Columns>                                     
                    <PagerSettings Mode="NumericFirstLast" />
                    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />                    
                    <PagerStyle BackColor="#006600" ForeColor="White" HorizontalAlign="Center" Height="10px" Font-Size="Smaller" />
                    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                    <HeaderStyle BackColor="#006600" Font-Bold="True" ForeColor="White" />
                    <EditRowStyle BackColor="#999999" />
                    <AlternatingRowStyle BackColor="White" ForeColor="#006600" />
                </asp:Gridview>     
            </ContentTemplate>
        </asp:UpdatePanel>  

Interestingly, when I add an 'Edit' button to the rows of the buried GridView it disappears as well.   What am I missing?

The entire page appears to post-back, and the formview disappears entirely.  This is killing me! :)

Getting closer.

 The Datasource for the FormView in each GridView row has to be manually bound based on the row it's in, which is done with a piece of C# code (see below).  When I commit the record and the page refreshes the C# code does not work because, for some reason, the Row.DataItem is null.  Getting closer

    protected void gvScreeningLog_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            SqlDataSource ctrl = e.Row.FindControl("sdsLogDetails") as SqlDataSource;
            if (ctrl != null && e.Row.DataItem != null)
            {
                ctrl.SelectParameters["ScreeningWeekID"].DefaultValue = ((DataRowView)e.Row.DataItem)["ScreeningWeekID"].ToString();
            }

            ctrl = e.Row.FindControl("sdsWeekDetails") as SqlDataSource;
            if (ctrl != null && e.Row.DataItem != null)
            {
                ctrl.SelectParameters["ScreeningWeekID"].DefaultValue = ((DataRowView)e.Row.DataItem)["ScreeningWeekID"].ToString();
            }
        }
    }

And I've corrected it by using the DataKey instead of reference the DataItem like so:

    protected void gvScreeningLog_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            SqlDataSource ctrl = e.Row.FindControl("sdsLogDetails") as SqlDataSource;
            int index = Convert.ToInt32(e.Row.RowIndex);

            if (ctrl != null)
            {
                ctrl.SelectParameters["ScreeningWeekID"].DefaultValue = ((GridView)sender).DataKeys[index].Value.ToString();
                
            }

            ctrl = e.Row.FindControl("sdsWeekDetails") as SqlDataSource;
            if (ctrl != null)
            {
                ctrl.SelectParameters["ScreeningWeekID"].DefaultValue = ((GridView)sender).DataKeys[index].Value.ToString();
            }
        }
    }