Ajax: tabcontainer not maintaining activetabindex between postbacks

Source: Internet
Author: User
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When I select a row from the gridview on "tabpanel2", the activetabindex is not maintained and appears to be reset.


<%@ page autoeventwireup="true" codefile="Tabs.aspx.cs" inherits="Tabs" language="C#"title="Untitled Page" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
using System;using System.Collections.Generic;public partial class Tabs : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){if (!this.IsPostBack){List<int> numbers = new List<int>();for (int i = 1; i < 11; i++){numbers.Add(i);}GridView1.DataSource = numbers;GridView1.DataBind();}}}

I looked into it. It seems it's caused by not saving CLIENT STATE correctly when the PostBack is triggered by gridview. My solution is saving it manually.

<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

protected void Page_Load(object sender, EventArgs e)
if (!this.IsPostBack)
System.Collections.Generic.List<int> numbers = new System.Collections.Generic.List<int>();

for (int i = 1; i < 11; i++)

GridView1.DataSource = numbers;

<title>Untitled Page</title>
<script type="text/javascript">
function OnChanged(sender, args)
sender.get_clientStateField().value = sender.saveClientState();

<form id="form1" runat="server">
<asp:scriptmanager id="ScriptManager1" runat="server">
<ajaxtoolkit:tabcontainer OnClientActiveTabChanged="OnChanged" id="TabContainer1" runat="server" ActiveTabIndex="0">
<ajaxtoolkit:tabpanel id="TabPanel1" runat="server" headertext="TabPanel1">
<ajaxtoolkit:tabpanel id="TabPanel2" runat="server" headertext="TabPanel2">
TabPanel2<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:gridview id="GridView1" runat="server" autogenerateselectbutton="True">

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