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<%@ Page Language="C#" AutoEventWireup="true"
CodeFile="Default.aspx.cs" Inherits="HiddenFieldTest" %>
<!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 id="Head1" runat="server">
<title>HiddenField Test</title>
<style type="text/css">
#left { float: left; width: 200px; }
#right { float: right; width: 200px; }
</style>
</head>
<body>
<form id="form1" runat="server">
<div id="container">
<h1>HiddenField Test</h1>
Click multiple times on these two images
<div id="left">
<div class="box">
<asp:ImageButton ID="ibtnImage1"
runat="server"
ImageUrl="http://www.java2java.com/style/logo.png"
AlternateText="Click on me"
OnClick="ibtnImage1_Click" />
<asp:Label ID="labMessage1" runat="server" />
</div>
</div>
<div id="right">
<div class="box">
<asp:ImageButton ID="ibtnImage2"
runat="server"
ImageUrl="http://www.java2java.com/style/logo.png"
AlternateText="Click on me"
OnClick="ibtnImage2_Click" />
<asp:Label ID="labMessage2" runat="server" />
</div>
</div>
<asp:HiddenField ID="hfImage1" runat="server" />
<asp:HiddenField ID="hfImage2" runat="server" />
</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 HiddenFieldTest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
hfImage1.Value = "0";
hfImage2.Value = "0";
}
}
protected void ibtnImage1_Click(object sender, EventArgs e)
{
IncrementCount(hfImage1);
labMessage1.Text = "# Clicks: " + hfImage1.Value;
}
protected void ibtnImage2_Click(object sender, EventArgs e)
{
IncrementCount(hfImage2);
labMessage2.Text = "# Clicks: " + hfImage2.Value;
}
private void IncrementCount(HiddenField hf)
{
int count = Convert.ToInt32(hf.Value);
count++;
hf.Value = count.ToString();
}
}
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