Hidden fields and ViewState (C#) : HiddenField « ASP.net Controls « ASP.NET Tutorial
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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>Hidden Fields and ViewState</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" Runat="server"></asp:TextBox>
<asp:Button ID="Button1" Runat="server" Text="Button" />
<asp:HiddenField ID="HiddenField1" Runat="server" />
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
[Serializable]
public class Person
{
public string firstName;
public string lastName;
}
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
HiddenField1.Value = "foo";
ViewState["AnotherHiddenValue"] = "bar";
Person p = new Person();
p.firstName = "Scott";
p.lastName = "Hanselman";
ViewState["HiddenPerson"] = p;
}
}
}