File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="PreserveMembers" %>
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtValue"
runat="server"
Height="160px"
TextMode="MultiLine"
Width="460px">This is a test</asp:TextBox><br />
<br />
<asp:Button ID="cmdSave"
runat="server"
OnClick="cmdSave_Click"
Text="Save Contents" />
<asp:Button ID="cmdLoad"
runat="server"
OnClick="cmdLoad_Click"
Text="Load Contents" /></div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class PreserveMembers : System.Web.UI.Page
{
private string contents;
protected void Page_Load(object sender, EventArgs e)
{
if (this.IsPostBack)
{
contents = (string)ViewState["contents"];
}
}
protected void Page_PreRender(Object sender, EventArgs e)
{
ViewState["contents"] = contents;
}
protected void cmdSave_Click(object sender, EventArgs e)
{
contents = txtValue.Text;
txtValue.Text = "";
}
protected void cmdLoad_Click(object sender, EventArgs e)
{
txtValue.Text = contents;
}
}