Trim view state : ViewState « Sessions « ASP.NET Tutorial
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- ViewState
<%@ Page Language="C#"
AutoEventWireup="true"
CodeFile="Default.aspx.cs"
Inherits="TrimViewState" %>
<!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:DropDownList ID="lstBig" runat="server" EnableViewState="False"/>
<asp:Button ID="cmdSubmit" runat="server" OnClick="cmdSubmit_Click" Text="Button" />
<asp:Label ID="lblInfo" runat="server" Text=""/>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
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 TrimViewState : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
for (int i = 0; i < 1000; i++)
{
lstBig.Items.Add(i.ToString());
}
if (Page.IsPostBack)
{
lstBig.SelectedItem.Text = Request.Form["lstBig"];
}
}
protected void cmdSubmit_Click(object sender, EventArgs e)
{
lblInfo.Text += lstBig.SelectedItem.Text + "<br />";
//lblInfo.Text = Request.Form["lstBig"];
}
}