ASP.Net
ADO.Net
Hidden fields are the server side and nonvisual controls in ASP.NET where you can save the value. Hidden field is one of the types of client-side state management technique and it retains the values between the postback events.
By selecting the browser view source (control+U) we can see the hidden field value. So, it is not safe to preserve the sensitive information like passwords on the hidden fields.
<asp:HiddenField ID="hdfValue" runat="server"/>
aspx page
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Welcome.aspx.cs" Inherits="WebProgramming.Welcome" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr><td colspan="2">
<asp:HiddenField ID="hdfValue" runat="server"/>
</td></tr>
<tr>
<td>
<asp:Label ID="lblOne" runat="server" Text="Increment" Font-Size="XX-Large"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" Height="42px" Width="298px"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblTwo" runat="server" Text="Copy from Increment" Font-Size="XX-Large"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox2" runat="server" AutoPostBack="True" Height="49px" Width="302px" EnableViewState="true"></asp:TextBox>
</td>
</tr>
<tr>
<td style="text-align:right">
<asp:Button ID="Button1" runat="server" Height="43px" OnClick="Button1_Click" Text="Submit" Width="90px" />
</td>
<td style="text-align:right">
<asp:Button ID="Button2" runat="server" Height="43px" OnClick="Button2_Click" Text="Submit2" Width="90px" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
Code Behind
protected void Page_Load(object sender, EventArgs e)
{
hdfValue.Value = "xyz";
}
Hidden field in the View source page:
No comments:
Post a Comment