Hello,
I am assigning a radcombobox's datasource property a List(of Person) and then databinding it. I have the Autopost property set to true so when a selection is made it will post back. Unfortunately, the radcombobox's datasource property is nothing when the postback occurs. Is there something I need to do to keep the datasource from being left to nothing? Since I can't attach a zip file I am providing code snippets.
I am assigning a radcombobox's datasource property a List(of Person) and then databinding it. I have the Autopost property set to true so when a selection is made it will post back. Unfortunately, the radcombobox's datasource property is nothing when the postback occurs. Is there something I need to do to keep the datasource from being left to nothing? Since I can't attach a zip file I am providing code snippets.
Imports Telerik.Web.UIImports System.LinqPartial Class _Default Inherits System.Web.UI.Page Private Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load If Not Page.IsPostBack Then Dim people = {New Person With {.Name = "Craig", .UserId = "Wil1"}, New Person With {.Name = "Kaitlyn", .UserId = "Wil2"}, New Person With {.Name = "Ben", .UserId = "Wil3"}}.ToList radCbo.DataTextField = "Name" : radCbo.DataValueField = "UserId" radCbo.DataSource = people radCbo.DataBind() End If End Sub Private Sub radCbo_SelectedIndexChanged(sender As Object, e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs) Handles radCbo.SelectedIndexChanged Dim ds = radCbo.DataSource Dim i = radCbo.SelectedItem.DataItem End SubEnd ClassPublic Class Person Public Property Name As String Public Property UserId As StringEnd Class<%@ Page Language="VB" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="RadControlsWebAppComboTest._Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title> <telerik:RadStyleSheetManager id="RadStyleSheetManager1" runat="server" /></head><body> <form id="form1" runat="server"> <telerik:RadScriptManager ID="RadScriptManager1" runat="server"> <Scripts> <%--Needed for JavaScript IntelliSense in VS2010--%> <%--For VS2008 replace RadScriptManager with ScriptManager--%> <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" /> <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" /> <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" /> </Scripts> </telerik:RadScriptManager> <script type="text/javascript"> //Put your JavaScript code here. </script> <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server"> </telerik:RadAjaxManager> <div> <telerik:RadComboBox runat="server" ID="radCbo" AutoPostBack="true" EnableViewState="true"></telerik:RadComboBox> </div> </form></body></html>
1 Answer, 1 is accepted
0
Hello Craig,
Take a look at the following forum threads discussing the issues you experience:
Regards,
Ivana
the Telerik team
Take a look at the following forum threads discussing the issues you experience:
- http://www.velocityreviews.com/forums/t116159-datagrid-datasource-is-null-on-postback.html.
- http://www.telerik.com/community/forums/aspnet/grid/radgrid-datasource-null-on-postback.aspx.
Regards,
Ivana
the Telerik team
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