FindControl return null для RadEditor

Question

У меня следующий RadGrid ниже. Я пытаюсь получить доступ к RadEditor, когда я редактирую и установить видимый ложному следующим образом, но получаю сообщение об ошибке, что она пуста:

protected void ItemCommand(object sender, GridCommandEventArgs e) 
    { 

     if (e.CommandName == "Edit") 
     { 

      var gridItem = e.Item as GridEditableItem; 
      if ("ActionItems".Equals(e.Item.OwnerTableView.Name)) 
      {     
       GridEditableItem editItem = e.Item as GridEditableItem; 

       RadEditor radEditor = editItem.FindControl("LimitEdit") as RadEditor; 
       radEditor.Visible = false; // get error message saying radEditor is null.   


      } 
     } 
    } 




     <telerik:RadGrid HeaderStyle-ForeColor="White" ID="SupportItemGrid" runat="server" CellSpacing="0" DataSourceID="SupportItemSource" 
     GridLines="None" OnInsertCommand="ItemInsert" OnItemCommand="ItemCommand" Skin="Metro" OnDeleteCommand="RadGrid1_DeleteCommand" 
     OnDataBound="SupportItemGrid_DataBound" OnItemDataBound="ItemDatabound" AllowSorting="true" AllowAutomaticUpdates="true"> 
     <ValidationSettings EnableValidation="True" CommandsToValidate="Insert"></ValidationSettings> 
     <MasterTableView AutoGenerateColumns="False" DataKeyNames="CompanyId,ItemId" DataSourceID="ActionItemSource" 
      AllowAutomaticInserts="True" AllowAutomaticUpdates="True" CommandItemDisplay="Top" AllowSorting="true" 
      Name="ActionItems" AllowPaging="True" PageSize="20" ExpandCollapseColumn-HeaderText="Comments" 
      ExpandCollapseColumn-UniqueName="Comments" HierarchyLoadMode="Client"> 
      <HeaderStyle HorizontalAlign="Center" ForeColor="White"></HeaderStyle> 
      <CommandItemSettings AddNewRecordText="Add New Support Item" ShowExportToExcelButton="true"></CommandItemSettings> 
      <EditFormSettings> 
       <EditColumn FilterControlAltText="Filter EditCommandColumn column"> 
       </EditColumn> 
      </EditFormSettings> 
      <DetailTables> 
       <telerik:GridTableView runat="server" AllowAutomaticInserts="True" DataKeyNames="CommentId" 
        Name="Comments" DataSourceID="CommentSource" CommandItemDisplay="Top" AutoGenerateColumns="False" 
        NoDetailRecordsText="No Comments To Display"> 
        <ParentTableRelation> 
         <telerik:GridRelationFields DetailKeyField="CompanyId" MasterKeyField="CompanyId" /> 
         <telerik:GridRelationFields DetailKeyField="ItemId" MasterKeyField="ItemId" /> 
        </ParentTableRelation> 
        <CommandItemSettings ExportToPdfText="Export to PDF" AddNewRecordText="Add New Comment" /> 
        <RowIndicatorColumn FilterControlAltText="Filter RowIndicator column" Visible="True"> 
         <HeaderStyle Width="20px" /> 
        </RowIndicatorColumn> 
        <ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column" Visible="True"> 
         <HeaderStyle Width="20px" /> 
        </ExpandCollapseColumn> 
        <EditFormSettings> 
         <EditColumn FilterControlAltText="Filter EditCommandColumn column"> 
         </EditColumn> 
        </EditFormSettings> 
        <Columns> 
         <telerik:GridTemplateColumn DataField="Comment" FilterControlAltText="Filter Comment column" 
          HeaderText="Comment" SortExpression="Comment" UniqueName="Comment"> 
          <EditItemTemplate> 
           <asp:TextBox ID="DescriptionTextBox" runat="server" TextMode="MultiLine" Height="100px" 
            Width="400" Text='<%# Bind("Comment") %>'></asp:TextBox> 
          </EditItemTemplate> 
          <ItemTemplate> 
           <asp:Label ID="CommentLabel" runat="server" Text='<%# Eval("Comment") %>'></asp:Label> 
          </ItemTemplate> 

         </telerik:GridTemplateColumn> 
         <telerik:GridBoundColumn DataField="UserName" DataType="System.String" FilterControlAltText="Filter UserName column" 
          HeaderText="User Name" SortExpression="UserName" UniqueName="UserName" ReadOnly="True"> 
          <HeaderStyle Width="150"></HeaderStyle> 
         </telerik:GridBoundColumn> 
         <telerik:GridBoundColumn DataField="DateEntered" DataType="System.DateTime" FilterControlAltText="Filter DateEntered column" 
          HeaderText="Date Entered" SortExpression="DateEntered" UniqueName="DateEntered" 
          ReadOnly="True"> 
          <HeaderStyle Width="150"></HeaderStyle> 
         </telerik:GridBoundColumn> 

         <telerik:GridTemplateColumn UniqueName="DeleteDetail" Visible="false"> 
          <ItemTemplate> 
           <telerik:RadButton ID="RemoveButton" runat="server" CommandName="Delete" Text="Delete" Width="75px"></telerik:RadButton> 
          </ItemTemplate> 
          <HeaderStyle Width="75"></HeaderStyle> 
         </telerik:GridTemplateColumn> 

        </Columns> 
       </telerik:GridTableView> 
      </DetailTables> 
      <CommandItemSettings ExportToPdfText="Export to PDF"></CommandItemSettings> 
      <RowIndicatorColumn Visible="True" FilterControlAltText="Filter RowIndicator column"> 
       <HeaderStyle Width="20px"></HeaderStyle> 
      </RowIndicatorColumn> 
      <ExpandCollapseColumn Visible="True" FilterControlAltText="Filter ExpandColumn column"> 
       <HeaderStyle Width="20px"></HeaderStyle> 
      </ExpandCollapseColumn> 
      <Columns> 
       <telerik:GridDropDownColumn DataSourceID="SitesDS" ListTextField="SiteName" 
        ListValueField="SiteId" UniqueName="SiteId" SortExpression="SiteId" 
        HeaderText="Site" DataField="SiteId" DropDownControlType="DropDownList" AllowVirtualScrolling="true" 
        ShowMoreResultsBox="true" ItemsPerRequest="10"> 
       </telerik:GridDropDownColumn> 
       <telerik:GridBoundColumn DataField="DateEntered" FilterControlAltText="Filter DateEntered column" 
        HeaderText="Date Entered" SortExpression="DateEntered" UniqueName="DateEntered" 
        DataType="System.DateTime"> 
        <HeaderStyle Width="85"></HeaderStyle> 
       </telerik:GridBoundColumn> 
       <telerik:GridDropDownColumn DataSourceID="ItemTypeSource" ListTextField="ItemType" 
        ListValueField="ItemTypeId" UniqueName="ItemTypeId" SortExpression="ItemTypeId" 
        HeaderText="Type" DataField="ItemTypeId" DropDownControlType="DropDownList" AllowVirtualScrolling="true" 
        ShowMoreResultsBox="true" ItemsPerRequest="10"> 

        <HeaderStyle Width="120"></HeaderStyle> 
       </telerik:GridDropDownColumn> 

       <telerik:GridTemplateColumn DataField="Description" FilterControlAltText="Filter Description column" 
        HeaderText="Description" SortExpression="Description" UniqueName="Description"> 
        <EditItemTemplate> 
         <asp:TextBox ID="txtDescription" UniqueName="txtDescription" runat="server" Text='<%# Bind("Description") %>'></asp:TextBox> 

         <telerik:RadEditor StripFormattingOnPaste="MSWord" ID="LimitEdit" runat="server" Content='<%# Bind("Description") %>' 
          Skin="Windows7"> 
         </telerik:RadEditor> 
        </EditItemTemplate> 
        <ItemTemplate> 
         <asp:Label ID="DescriptionLabel" runat="server" Text='<%# Eval("Description") %>'></asp:Label> 
        </ItemTemplate> 
        <ItemStyle HorizontalAlign="Left" /> 
       </telerik:GridTemplateColumn> 


       <telerik:GridButtonColumn ConfirmText="Delete?" ConfirmDialogType="RadWindow" HeaderText="Delete" SortExpression="DeleteMain" UniqueName="DeleteMain" 
        Display="false" ConfirmTitle="Delete" ButtonType="ImageButton" CommandName="Delete" /> 

      </Columns> 
      <EditFormSettings> 
       <EditColumn FilterControlAltText="Filter EditCommandColumn column"> 
       </EditColumn> 
      </EditFormSettings> 
      <EditItemStyle HorizontalAlign="Left" /> 
     </MasterTableView> 
     <FilterMenu EnableImageSprites="False"> 
     </FilterMenu> 
     <HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default"> 
     </HeaderContextMenu> 
    </telerik:RadGrid> 

Answer 1

Хотя вы не используете ретранслятор, вы, вероятно, попав в такой же вопрос, как описано &, разрешенный в этом вопросе SO - How to FindControls in repeater control?

То есть, пока RadGrid не привязан, элементы управления не существуют.