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);
}