ASP.NET Podcast Show #117 - Using the History Functionality with the ASP.NET AJAX UpdatePanel in .NET 3.5 Service Pack 1 Beta 1
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Show Notes:
- The current UpdatePanel functionality with regards to back.
- The UpdatePanel with History in .NET 3.5 SP1 Beta1.
- EnableSecureHistoryState.
- INETA Community Champions Program @ http://www.ineta.org/Champions/CommunityChampionInfo.aspx.
Images:
This is the UpdatePanel with EnableSecureHistoryState set to true
This is the UpdatePanel with EnableSecureHistoryState set to false.
Source Code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpdatePanelHistory.aspx.cs" Inherits="UpdatePanelHistory"
%>
<!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>UpdatePanel
History Button</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="scm" runat="server"
EnableHistory="true"
OnNavigate="scm_Navigate"
/>
<div>
<asp:Button ID="btnSubmit" runat="server" Text="Click Me!"
onclick="btnSubmit_Click" />
<asp:UpdatePanel ID="upl" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="lblTime" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnSubmit" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using
System.Collections.Specialized;
public partial
class UpdatePanelHistory
: System.Web.UI.Page
{
protected void Page_Load(object
sender, EventArgs e)
{
}
protected void scm_Navigate(object
sender, HistoryEventArgs he)
{
NameValueCollection
pageState = he.State;
string
dtS;
if
(pageState != null)
{
dtS = pageState.Get("Time");
if
(!String.IsNullOrEmpty(dtS))
{
lblTime.Text = dtS;
}
else
{
lblTime.Text = String.Empty;
}
upl.Update();
}
}
protected void btnSubmit_Click(object
sender, EventArgs e)
{
string
dtS = DateTime.Now.ToString();
lblTime.Text = dtS;
if
((scm.IsInAsyncPostBack == true) &&
(scm.IsNavigating != true))
{
AddHistoryPoint(dtS);
}
}
private void AddHistoryPoint(string
HistoryPoint)
{
NameValueCollection
pageState = new NameValueCollection();
pageState.Add("Time",
HistoryPoint);
scm.AddHistoryPoint(pageState, "Time:" + HistoryPoint);
}