I dont know how to get the ID if the RadGrid is dynamically
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" EnablePartialRendering="true" LoadScriptsBeforeUI="false" EnableCdn="true" ScriptMode="Release"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="RadGrid1"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" /> <telerik:AjaxUpdatedControl ControlID="RadInputManager1" LoadingPanelID="RadAjaxLoadingPanel1" /> <telerik:AjaxUpdatedControl ControlID="RadWindowManager1" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings></telerik:RadAjaxManager> <asp:Repeater ID="rp1" runat="server" OnItemDataBound="rp1_ItemDataBound"> <ItemTemplate> <div class="panel panel-default"> <div class="panel-heading" role="tab" id="headingOne"> <h4 class="panel-title"> <a role="button" data-toggle="collapse" href='#collapse<%# index %>' aria-expanded="false" aria-controls="collapseOne"><%# Eval("nome") %> </a> </h4> </div> <div id='collapse<%# index %>' class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne"> <div class="panel-body"> <asp:UpdatePanel runat="server" ID="up1"> <ContentTemplate> <%-- <%-- Inicio do Telerik --%> <telerik:RadFormDecorator runat="server" DecorationZoneID="demo" EnableRoundedCorners="false" DecoratedControls="All" /> <div id="demo" class="demo-container no-bg"> <telerik:RadGrid ID="RadGrid1" runat="server" Skin="Metro" AllowPaging="True" AllowAutomaticUpdates="True" AllowAutomaticInserts="True" AllowAutomaticDeletes="true" AllowSorting="true" OnItemCreated="RadGrid1_ItemCreated" OnItemInserted="RadGrid1_ItemInserted" OnPreRender="RadGrid1_PreRender" OnInsertCommand="RadGrid1_InsertCommand" OnUpdateCommand="RadGrid1_UpdateCommand" OnEditCommand="RadGrid1_EditCommand"> <PagerStyle Mode="NextPrevAndNumeric" /> <MasterTableView AutoGenerateColumns="False" NoDetailRecordsText="Não há eventos a serem exibidos" NoMasterRecordsText="Não há eventos" DataKeyNames="id" CommandItemDisplay="Bottom"> <Columns> <telerik:GridBoundColumn DataField="nomeEspaco" Visible="false" ReadOnly="true"></telerik:GridBoundColumn> <telerik:GridEditCommandColumn ButtonType="ImageButton" UpdateText="Salvar Alterações" EditText="Alterar" UniqueName="EditCommandColumn"> </telerik:GridEditCommandColumn> <telerik:GridButtonColumn Text="Deletar" CommandName="Delete" ConfirmText="Você tem certeza que deseja deletar esse registro? não será possÃvel desfazer essa ação" ButtonType="ImageButton" /> <telerik:GridBoundColumn DataField="id" HeaderText="ID" ReadOnly="true" SortExpression="id" UniqueName="id" Visible="false" MaxLength="5"> </telerik:GridBoundColumn> <telerik:GridDropDownColumn DataSourceID="ods2" DataField="periodo" ListTextField="nome" ListValueField="valor" HeaderText="PerÃodo" UniqueName="periodo"> </telerik:GridDropDownColumn> <telerik:GridBoundColumn DataField="nomeCliente" ReadOnly="true" HeaderText="Nome do cliente" SortExpression="ContactTitle" UniqueName="ContactTitle"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="email" ReadOnly="true" HeaderText="E-mail" SortExpression="CompanyName" UniqueName="CompanyName"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="telefone" ReadOnly="true" HeaderText="Telefone" SortExpression="Phone" UniqueName="Phone"> </telerik:GridBoundColumn> <telerik:GridDropDownColumn DataField="formato" DataSourceID="ods5" HeaderText="Formato" SortExpression="formato" ListTextField="nome" ListValueField="valor" UniqueName="formato"> </telerik:GridDropDownColumn> <telerik:GridDropDownColumn DataField="nomeStatus" DataSourceID="ods3" HeaderText="Status" SortExpression="status" ListTextField="nome" ListValueField="valor" UniqueName="status"> </telerik:GridDropDownColumn> <telerik:GridDropDownColumn DataField="tipoEvento" DataSourceID="ods4" HeaderText="Tipo de Evento" SortExpression="tipoEvento" ListTextField="nome" ListValueField="valor" UniqueName="tipoEvento"> </telerik:GridDropDownColumn> </Columns> <EditFormSettings> <EditColumn CancelText="Cancelar" UpdateText="Salvar Alterações" ButtonType="ImageButton" /> </EditFormSettings> <CommandItemSettings AddNewRecordText="Adicionar novo evento" /> </MasterTableView> </telerik:RadGrid> <telerik:RadWindowManager ID="RadWindowManager1" runat="server" /> </ContentTemplate> </asp:UpdatePanel> </div> <%-- Fim do Telerik --%> </div> </div> </div> </ItemTemplate> </asp:Repeater>