Submitting Form Data : Form « HTML Controls « ASP.NET Tutorial

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        lblTime.Text = DateTime.Now.ToString("T");
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Button</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Button
        id="btnSubmit"
        Text="Submit"
        OnClick="btnSubmit_Click"
        Runat="server" />

    <br /><br />

    <asp:Label
        id="lblTime"
        Runat="server" />

    </div>
    </form>
</body>
</html>

4.5.Form
	4.5.1.	form default focus
	4.5.2.	Use HTML form to layout asp.net controls (VB.net)
	4.5.3.	Submitting Form Data
	4.5.4.	Specifying a Default Button
	4.5.5.	A survey form (C#)
	4.5.6.	Using validation controls to fill a form.
	4.5.7.	one server-side form tag and multiple client HTML form elements
	4.5.8.	Multiple server forms can be employed as long as only one is rendered at a time