AJAX: TabContainer not maintaining ActiveTabIndex between postbacks

最後更新：2018-12-05 來源：互聯網

上載者：User

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文章目錄

Problems
Solutions

Problems

When I select a row from the GridView on "TabPanel2", the ActiveTabIndex is not maintained and appears to be reset.

ASPX

<%@ 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"><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"><title>Untitled Page</title></head><body><form id="form1" runat="server"><aspx:scriptmanager id="ScriptManager1" runat="server"></aspx:scriptmanager><ajax:tabcontainer id="TabContainer1" runat="server"><ajax:tabpanel id="TabPanel1" runat="server" headertext="TabPanel1"><contenttemplate>TabPanel1</contenttemplate></ajax:tabpanel><ajax:tabpanel id="TabPanel2" runat="server" headertext="TabPanel2"><contenttemplate>TabPanel2<asp:gridview id="GridView1" runat="server" autogenerateselectbutton="true"></asp:gridview></contenttemplate></ajax:tabpanel></ajax:tabcontainer></form></body></html>

CODE-BEHIND

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();}}}

Solutions

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++)
{
numbers.Add(i);
}

GridView1.DataSource = numbers;
GridView1.DataBind();
}
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Untitled Page</title>
<script type="text/javascript">
function OnChanged(sender, args)
{
sender.get_clientStateField().value = sender.saveClientState();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:scriptmanager id="ScriptManager1" runat="server">
</asp:scriptmanager>
<ajaxtoolkit:tabcontainer OnClientActiveTabChanged="OnChanged" id="TabContainer1" runat="server" ActiveTabIndex="0">
<ajaxtoolkit:tabpanel id="TabPanel1" runat="server" headertext="TabPanel1">
<contenttemplate>
TabPanel1
</contenttemplate>
</ajaxtoolkit:tabpanel>
<ajaxtoolkit:tabpanel id="TabPanel2" runat="server" headertext="TabPanel2">
<contenttemplate>
TabPanel2<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:gridview id="GridView1" runat="server" autogenerateselectbutton="True">
</asp:gridview>
</contenttemplate>
</ajaxtoolkit:tabpanel>
</ajaxtoolkit:tabcontainer>
</form>
</body>
</html>

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