Mega Code Archive
Use ViewState to create a simple counter (C#)
<![CDATA[
File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="SimpleCounter" %>
<!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:Button ID="cmdIncrement"
runat="server"
OnClick="cmdIncrement_Click"
Text="Increment" /><br />
<br />
<asp:Label ID="lblCount" runat="server"></asp:Label> </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 SimpleCounter : System.Web.UI.Page
{
protected void cmdIncrement_Click(object sender, EventArgs e)
{
int counter;
if (ViewState["Counter"] == null)
{
counter = 1;
}
else
{
counter = (int)ViewState["Counter"] + 1;
}
ViewState["Counter"] = counter;
lblCount.Text = "Counter: " + counter.ToString();
}
}
]]>