Code File:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Data.SqlClient ;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class LogingPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button6_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection("trusted_connection=true;database=iip");
        SqlCommand cmd = new SqlCommand("select * from table1 where Email=@Email and Password=@Password", con);
        SqlParameter pa1 = new SqlParameter("@Email", DbType.String);
        pa1.Value = TextBox1.Text;
        cmd.Parameters.Add(pa1);
        SqlParameter pa2 = new SqlParameter("@Password", DbType.String);
        pa2.Value = TextBox2.Text;
        cmd.Parameters.Add(pa2);
        SqlDataAdapter da = new SqlDataAdapter();
        da.SelectCommand = cmd;
        DataTable dt = new DataTable();
        da.Fill(dt);
        if (dt.Rows.Count == 0)
        {
            TextBox1.Text = "";
            TextBox2.Text = "";
            Label1.Text = "Invalid User Name <br> and password";
        }
        else {
            Session["uname"] = TextBox1.Text;
            Response.Redirect("Default.aspx");
        }
    }
}