Login Form in ASP.NET

First you have to design a login form:

username:
password:
login:

Coding like this

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="WebForm1.aspx.vb" Inherits="WebApplication.css.WebForm1" >
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

   <head runat="server">

      <title></title>

   </head>

      <body>

         <form id="form1" runat="server">

            <div>

               username<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

               <br />

              password<asp:TextBox ID="TextBox2" runat="server" style="margin-bottom: 0px"></asp:TextBox>

            </div>

            <p>

               <asp:LoginStatus ID="loginsuccessfully" runat="server" />

            </p>

            <p>

            </p>

            <p>

            </p>

       </form>

    </body>

</html>

Next page coding this:

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="WebForm3.aspx.vb" Inherits="WebApplication.css.WebForm3" >
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

   <head runat="server">

   <title></title>

</head>

<body>

   <form id="form1" runat="server">

      <div>

      welcome soundaryaharee<br />

      </div>

      </form>

   </body>

</html>

Login coding for VB:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Configuration;
using System.Data.SqlClient;
using System.Web.Security;
namespace User_Login_CS
{
   public partial class Login : System.Web.UI.Page
   {
      protected void ValidateUser(object sender, EventArgs e)
      {
         int userId = 0;
         string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
         using (SqlConnection con = new SqlConnection(constr))
         {
            using (SqlCommand cmd = new SqlCommand("Validate_User"))
            {
               cmd.CommandType = CommandType.StoredProcedure;
               cmd.Parameters.AddWithValue("@Username", Login1.UserName);
               cmd.Parameters.AddWithValue("@Password", Login1.Password);
               cmd.Connection = con;
               con.Open();
               userId = Convert.ToInt32(cmd.ExecuteScalar());

               con.Close();
            }
            switch (userId)
            {
               case -1:
               Login1.FailureText = "Username and/or password is incorrect.";
               break;
               case -2:
               Login1.FailureText = "Account has not been activated.";
               break;
               case -3:
               Response.Write("welcome soundaryaharee");
               break;
         }
      }
   }
}

Web confiquration:

<?xml version="1.0"?>
<configuration>
   <connectionStrings>
      <add name="constr" connectionString="Data Source=edpadmin-
      pc\test.Trainee.dbo;Initial Catalog=LoginDB;user id=sa;password=SA;"/>
   </connectionStrings>
   <compilation debug="true" targetFramework="4.0"/>
   <system.web>
      <authentication mode="Forms">
         <forms defaultUrl="~/Home.aspx" loginUrl="~/Login.aspx" slidingExpiration="true" timeout="2880">
         </forms>
      </authentication>
   </system.web>
</configuration>