what is the value that reside in a hidden field when no value is assigned to i

what is the value that reside in a hidden field when no
value is assigned to it?how it can be used in a if
statement??

Question Posted / prakash kuttappan

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what is the value that reside in a hidden field when no value is assigned to it?how it can be used..

Answer / rupinder

If No value assigned to a hidden field then it contains
String.Empty value.

Habling empty value:

<%@ Page Language="VB" AutoEventWireup="true"
CodeFile="Default.aspx.vb" 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 runat="server">
<title>Demo</title>
</head>
<body>
<form id="form1" runat="server">
<asp:HiddenField ID="hndField" runat="server" />
</form>
</body>
</html>

Code behind...
Protected Sub Page_Load(ByVal sender As Object, ByVal e
As System.EventArgs) Handles Me.Load

If hndField.Value <> String.Empty Then
do......
End If
End Sub