or
<div> <telerik:RadGrid ID="RadGrid1" runat="server" Culture="zh-TW" DataSourceID="LinqDataSource_apply" AllowAutomaticDeletes="True" AllowAutomaticInserts="True" AllowAutomaticUpdates="True" CellSpacing="0" GridLines="None" AllowFilteringByColumn="True" AllowSorting="True"> <MasterTableView AutoGenerateColumns="False" DataSourceID="LinqDataSource_apply" CommandItemDisplay="Top" DataKeyNames="user_email" AllowPaging="True" PageSize="15"> <NestedViewTemplate> <telerik:RadTabStrip ID="RadTabStrip1" runat="server" MultiPageID="RadMultiPage1
" SelectedIndex="0" Skin="Windows7"> <Tabs> <telerik:RadTab runat="server" Text="USER" PageViewID="RadPageView1
"></telerik:RadTab> </Tabs> </telerik:RadTabStrip> <telerik:RadMultiPage ID="RadMultiPage1" runat="server"> <telerik:RadPageView ID="RadPageView1" runat="server"> <asp:LinqDataSource ID="LinqDataSource_register" runat="server" ContextTypeName="db_DataContext" EntityTypeName="" TableName="register" Where="email == @email"> <WhereParameters> <asp:ControlParameter ControlID="Label1" Name="email" PropertyName="Text" Type="String" /> </WhereParameters> </asp:LinqDataSource> <asp:Label ID="Label1" Font-Bold="true" Font-Italic="true" Text='<%# Eval("user_email") %>' Visible="false" runat="server"></asp:Label> <asp:DetailsView ID="DetailsView_user" runat="server" DataSourceID="LinqDataSource_register" Width="300px" Height="300px" AutoGenerateRows="false"> <Fields> <asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True" SortExpression="id" /> <asp:BoundField DataField="name" HeaderText="name" SortExpression="name" /> <asp:BoundField DataField="orgnaization" HeaderText="orgnaization" SortExpression="orgnaization" /> </Fields> </asp:DetailsView> </telerik:RadPageView> </telerik:RadMultiPage> </NestedViewTemplate> <Columns> <telerik:GridBoundColumn DataField="apply_no" FilterControlAltText="Filter apply_no column" HeaderText="apply_no" SortExpression="apply_no" UniqueName="apply_no" DataType="System.Int32" ReadOnly="True"> <ColumnValidationSettings> <ModelErrorMessage Text=""></ModelErrorMessage> </ColumnValidationSettings> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="user_email" FilterControlAltText="Filter user_email column" HeaderText="user_email" SortExpression="user_email" UniqueName="user_email"> <ColumnValidationSettings> <ModelErrorMessage /> </ColumnValidationSettings> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="type" FilterControlAltText="Filter type column" HeaderText="type" SortExpression="type" UniqueName="type"> <ColumnValidationSettings> <ModelErrorMessage /> </ColumnValidationSettings> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="usage" FilterControlAltText="Filter usage column" HeaderText="usage" SortExpression="usage" UniqueName="usage"> <ColumnValidationSettings> <ModelErrorMessage Text="" /> </ColumnValidationSettings> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="date_apply" DataType="System.DateTime" FilterControlAltText="Filter date_apply column" HeaderText="date_apply" SortExpression="date_apply" UniqueName="date_apply"> <ColumnValidationSettings> <ModelErrorMessage Text="" /> </ColumnValidationSettings> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="review_status" FilterControlAltText="Filter review_status column" HeaderText="review_status" SortExpression="review_status" UniqueName="review_status"> <ColumnValidationSettings> <ModelErrorMessage Text="" /> </ColumnValidationSettings> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="reject" DataType="System.Int32" FilterControlAltText="Filter reject column" HeaderText="reject" SortExpression="reject" UniqueName="reject"> <ColumnValidationSettings> <ModelErrorMessage Text="" /> </ColumnValidationSettings> </telerik:GridBoundColumn> </Columns> <EditFormSettings> <EditColumn FilterControlAltText="Filter EditCommandColumn1 column" UniqueName="EditCommandColumn1" ButtonType="ImageButton"> </EditColumn> <PopUpSettings Modal="true" /> </EditFormSettings> <ItemStyle HorizontalAlign="Center" /> <AlternatingItemStyle HorizontalAlign="Center" /> <HeaderStyle HorizontalAlign="Center" /> <FilterItemStyle HorizontalAlign="Center" /> </MasterTableView> </telerik:RadGrid> </div> <asp:LinqDataSource ID="LinqDataSource_apply" runat="server" ContextTypeName="db_DataContext" EntityTypeName="" TableName="apply" EnableDelete="True" EnableInsert="True" EnableUpdate="True"></asp:LinqDataSource>



<telerik:RadComboBox ID="rcb_County" runat="server" OnDataBound="rcb_County_DataBound"> <ItemTemplate> <asp:CheckBoxList ID="cbl_County" runat="server" autopostback="True" OnSelectedIndexChanged="CheckBoxList_SelectedIndexChanged"> </asp:CheckBoxList> </ItemTemplate> </telerik:RadComboBox> <asp:CustomValidator ID="cvCounty" runat="server" ClientValidationFunction="validateCounty" CssClass="validation" ErrorMessage="* Required"></asp:CustomValidator>
in ascx
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server"> <ClientEvents></ClientEvents> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="rcb_County"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="rcb_County" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings></telerik:RadAjaxManager>
protected void CheckBoxList_SelectedIndexChanged(object sender, EventArgs e){ListBox.Items.Clear();System.Threading.Thread.Sleep(1000);CheckBoxList cbl_County = rcb_County.Items[0].FindControl("cbl_County") as CheckBoxList;foreach (ListItem val in cbl_County.Items){if (val.Selected){ListBox.Items.Add(val.Text);}}}

<asp:ObjectDataSource ID="UsersData" runat="server" SelectMethod="GetAll" DataObjectTypeName="TestingApp.Lib.Domain.User" TypeName="TestingApp.Lib.Repositories.UserRepository"></asp:ObjectDataSource>public IEnumerable<User> GetAll();"Unable to cast object of type 'TestingApp.Lib.Domain.User' to type 'TestingApp.Lib.Domain.AdminUser'."
var combo = $find(comboId);combo.hideDropDown();combo.trackChanges();combo.clearSelection();combo.commitChanges();var f = { Command: "Select", Index: combo.get_selectedIndex() };combo.postback(f);