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Sunday, June 30, 2013

using hidden field in asp.net | Example hidden variable in asp.net | hidden field state management

Below is example for using a hidden field in asp.net :

aspx code :

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <input id="usrName" type="hidden" runat="server" />
    <asp:Button runat="server" Text="Show Value"/>
    </div>
    </form>
</body>
</html>

codebehind :

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;

public partial class usingHiddenvariable : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            usrName.Value = "chandan";
        }
        else
        {
            showHiddenValue();
        }

    }

    public void showHiddenValue()
    {
        Response.Write("<script language='javascript'>alert('Hidden value: "+ usrName.Value.ToString() +"');</script>");
    }
}

Result :