protected void register_Click(object sender, EventArgs e) { string mail = Request.Form["email"]; string u = Request.Form["usrname"]; string p = Request.Form["usrpwd"]; string rep = Request.Form["repwd"]; if (p != rep) { DataTable dt = u1.check(u); if (dt.Rows.Count > 0) { Response.Write("<script>alert('Username alreday exist')</script>"); usrname.Text = ""; } } else { Session["u"] = u; u1.logininsert(mail, u, p); Response.Write("<script>alert('Registration Succesful')</script>"); } }