ASP.NET HiddenField Sample Code | How to use HiddenField Control?


HiddenField.aspx (UI)

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HiddenField.aspx.cs" Inherits="WebDemo01.HiddenField" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">
    <title></title>
</head>

<body>
    <form id="form1" runat="server">
        <asp:HiddenField ID="HiddenField1" runat="server" 
         Value="Sharp Land" />
        <br />
        <asp:HiddenField ID="HiddenField2" runat="server" Value="1001" />
        <br />
        <asp:Label ID="lblMsg1" runat="server" Text="Welcome">
        </asp:Label>
        <br />
        <br />
        <asp:Button ID="btnClick" runat="server" 
        Text="Click Me to change Hidden Field value at Runtime"                    OnClick="btnClick_Click" Width="400px" />
        <br />
        <br />
        <asp:Label ID="lblMsg2" runat="server" Text="Welcome">
        </asp:Label>
    </form>
</body>
</html>


HiddenField.aspx.cs

using System;

namespace WebDemo01
{
    public partial class HiddenField : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            lblMsg1.Text = "Welcome to " + HiddenField1.Value + 
            " Your visitor's count is " + HiddenField2.Value;
        }
        protected void btnClick_Click(object sender, EventArgs e)
        {
            HiddenField1.Value = "Sharp Land";
            lblMsg2.Text = "Welcome to " + HiddenField1.Value;
        }
    }
}

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