The Login.aspx page (C#)
<%@ Page Language="C#"%> <script runat="server"> protected void Button1_Click(object sender, EventArgs e) { if (TextBox1.Text == "A" && TextBox2.Text == "B") { FormsAuthentication.RedirectFromLoginPage(TextBox1.Text, true); } else { Response.Write("Invalid credentials"); } } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Login Page</title> </head> <body> <form id="form1" runat="server"> <div> Username<br /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br /> <br /> Password<br /> <asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox><br /> <br /> <asp:Button ID="Button1" OnClick="Button1_Click" runat="server" Text="Submit" /> </div> </form> </body> </html>