Visualize the current Base64-encoded contents of the view state : ViewState « Page Lifecycle « ASP.NET Tutorial
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- Page Lifecycle
- ViewState
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Try to Break Your Viewstate</title>
</head>
<script language="javascript">
function ShowViewState()
{
var buf = document.forms[0]["__VIEWSTATE"].value;
var o = document.forms[0]["ViewStateBox"];
o.value = buf;
}
function UpdateViewState()
{
var o = document.forms[0]["ViewStateBox"];
var viewstate = document.forms[0]["__VIEWSTATE"];
viewstate.value = o.value;
}
</script>
<body>
<form id="form1" runat="server">
<div id="pageContent">
<input onclick="ShowViewState()" type="button" value="Display View State" style="width:200px" />
<input onclick="UpdateViewState()" type="button" value="Update View State" style="width:200px" />
<h2>Here's Your (Encoded) ViewState</h2>
<asp:TextBox id="ViewStateBox" runat="server" TextMode="MultiLine" Width="100%" Height="250px"></asp:TextBox>
<asp:Button id="Button1" runat="server" Text="Post Back..."></asp:Button>
</div>
</form>
</body>
</html>