Hide Expand nestedviewtemplate

[Reeba]

<telerik:RadGrid ID="rgStatus" runat="server" AutoGenerateColumns="False" BorderStyle="None" Width="100%">
                                      <HeaderStyle HorizontalAlign="Left" Font-Bold="true" BorderWidth="0" BorderStyle="None" />
                                      <ItemStyle BorderStyle="None" BorderWidth="0" />
                                      <AlternatingItemStyle BorderStyle="None" BorderWidth="0" />
                                      <ClientSettings EnablePostBackOnRowClick="false"></ClientSettings>
                                      <MasterTableView>
                                          <Columns>
                                              <telerik:GridTemplateColumn ItemStyle-Width="250" DataField="StsExternalDesc" UniqueName="StsExternalName" HeaderText="Status">
                                                  <ItemTemplate>
                                                      <asp:Label ID="lblStatus" runat="server" Text='<%#DataBinder.Eval(Container, "DataItem.StsExternalDesc") %>' />
                                                  </ItemTemplate>
                                              </telerik:GridTemplateColumn>
                                              <telerik:GridBoundColumn ItemStyle-Width="125" DataField="StsDateTime" HeaderText="Date" />
                                              <telerik:GridBoundColumn ItemStyle-Width="99" DataField="StsDateTime" HeaderText="Time" />
                                          </Columns>
                                          <NestedViewTemplate>
                                               <table border="0" cellpadding="2" cellspacing="0">
                                                   <tr id="trStsDesc1">
                                                      <td><asp:Label ID="lblStsDesc1" runat="server" Text='<%# Eval("StsDesc1") %>'></asp:Label></td>
                                                   </tr>
                                                  <tr id="trStsDesc2">
                                                      <td><asp:Label ID="lblStsDesc2" runat="server" Text='<%# Eval("StsDesc2") %>'></asp:Label></td>
                                                  </tr>
                                              </table>

                                          </NestedViewTemplate>
                                      </MasterTableView>

                                  </telerik:RadGrid>

I see alot of articles on this subject but I am still not able to get it to work. I have   a gridview with 3 columns status,date,time.
For each status there could be some notes associated with it, which if there are notes then show in the nestedtemplate.My issue is if there are no notes I don't want to see the image to expand. If there is a note for a particular status then show the image to expand.Right now my code shows the expand image even if the notes are blank.

 

[Pavlina]

Hi Reeba,

Please, take a look at this help article that explains how to hide expand/collapse images when no records and let us know if any of your questions remain unanswered afterwards.

Best wishes,
Pavlina
the Telerik team

[Reeba]

<telerik:RadGrid ID="rgStatus" runat="server" AutoGenerateColumns="False" BorderStyle="None" Width="100%" OnPreRender="rgStatus_PreRender" >
                                        <HeaderStyle HorizontalAlign="Left" Font-Bold="true" BorderWidth="0" BorderStyle="None" />
                                        <ItemStyle BorderStyle="None" BorderWidth="0" />
                                        <AlternatingItemStyle BorderStyle="None" BorderWidth="0" />
                                        <ClientSettings EnablePostBackOnRowClick="false"></ClientSettings>
                                        <MasterTableView HierarchyLoadMode="ServerBind" HierarchyDefaultExpanded="true">
                                            <Columns>
                                                <telerik:GridTemplateColumn ItemStyle-Width="250" DataField="StsExternalDesc" UniqueName="StsExternalName" HeaderText="Status">
                                                    <ItemTemplate>
                                                        <asp:Label ID="lblStatus" runat="server" Text='<%#DataBinder.Eval(Container, "DataItem.StsExternalDesc") %>' />
                                                    </ItemTemplate>
                                                </telerik:GridTemplateColumn>
                                                <telerik:GridBoundColumn ItemStyle-Width="125" DataField="StsDateTime" HeaderText="Date" />
                                                <telerik:GridBoundColumn ItemStyle-Width="99" DataField="StsDateTime" HeaderText="Time" />
                                            </Columns>

                                            <NestedViewTemplate>

                                                 <table border="0" cellpadding="2" cellspacing="0">
                                                     <tr id="trStsDesc1">
                                                        <td><asp:Label ID="lblStsDesc1" runat="server" Text='<%# Eval("StsDesc1") %>'></asp:Label></td>
                                                     </tr>
                                                    <tr id="trStsDesc2">
                                                        <td><asp:Label ID="lblStsDesc2" runat="server" Text='<%# Eval("StsDesc2") %>'></asp:Label></td>
                                                    </tr>
                                                </table>

                                            </NestedViewTemplate>

                                        </MasterTableView>

                                    </telerik:RadGrid>

' Protected Sub rgStatus_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles rgStatus.PreRender
    '        Dim rgStatsInfo As RadGrid = DirectCast(sender, RadGrid)
    '       HideExpandColumnRecursive(rgStatsInfo.MasterTableView)

     For Each item As GridNestedViewItem In rgStatus.MasterTableView.GetItems(GridItemType.NestedView)
    '// loop through the nested items of a NestedView TemplateRJ


    For Each nestedView As GridTableView In item.NestedTableViews
    If item.NestedTableViews.Count = 0 Then RJ

    Dim cell As TableCell = item.ParentItem("ExpandColumn")
    'cell.Controls(0).Visible = False
    'item.Visible = False
    Dim parentitem As GridDataItem = DirectCast(item.ParentItem, GridDataItem)
    Dim cell As TableCell = parentitem("ExpandColumn")
    cell.Controls.Clear()

    End If
    Next

    End Sub

In the example you send there were detail tables.In my code I am not using detail tables. Still not able to figure what I am not doing right.

[Pavlina]

Hi Reeba,

You can try the approach suggested by Princy in the following forum thread:
http://www.telerik.com/community/forums/aspnet-ajax/grid/how-to-hide-expand-cell-when-record-not-found.aspx

Greetings,
Pavlina
the Telerik team

[Reeba]

Protected Sub rgStatus_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles rgStatus.PreRender
        ' loop through the nested items of a NestedView Template
        For Each item As GridNestedViewItem In rgStatus.MasterTableView.GetItems(GridItemType.NestedView)
            Dim lbl_1 As Label = DirectCast(item.FindControl("lblStsDesc1"), Label)
            Dim lbl_2 As Label = DirectCast(item.FindControl("lblStsDesc2"), Label)

            If (Trim(lbl_1.Text) = Nothing And Trim(lbl_2.Text) = Nothing) Then
                Dim parentitem As GridDataItem = DirectCast(item.ParentItem, GridDataItem)
                Dim cell As TableCell = parentitem("ExpandColumn")
                cell.Controls.Clear()
            End If
        Next

    End Sub

Thanks I was finally able to find what I was doing wrong.I have posted my code for anyone who might find it useful.It works perfectly for me now.

[Pavlina]

Hi Reeba,

I am glad you managed to make the things work. In case you experience further problems or you have additional questions, I will be happy to assist.

All the best,
Pavlina
the Telerik team