protected void btningresar_Click(object sender, EventArgs e)
        {
            string user = txtuser.Text;
            string pass = GetMD5(txtpass.Text);
            BDRegistroEntities1 db = new BDRegistroEntities1();

            string query = (from c in db.usuarios
                            where c.Usuario1 == user && c.Contrasena == pass
                            select c.Nombres).FirstOrDefault();

            string cedula = (from c in db.usuarios
                          where c.Usuario1 == user && c.Contrasena == pass
                          select c.Cedula).FirstOrDefault();

            int IdTipo = (from t in db.TipoUsuarios
                          where t.Cedula == cedula
                          select t.IdTipoUsuario).FirstOrDefault();

             if (query != null)
            {
                Session["cedula"] = cedula.ToString();
                Session["tipousuario"] = IdTipo.ToString();

                if (IdTipo == 1)
                {
                    Session["user"] = query;
                    Response.Redirect("Inicio.aspx");

                }
                else
                {

                    Session["user"] = query;
                    Response.Redirect("Inicio.aspx");
                }
            }
            else
            {
                lblMensaje.Text = "Usuario o Contraseña Incorrecto";
            }
        }
        protected void btnRol_Click(object sender, EventArgs e)
        {
            using (BDRegistroEntities1 oConexion = new BDRegistroEntities1())
            {
                TipoUsuario Rol = new TipoUsuario();

                Rol.Cedula =txtCed.Text;
                Rol.IdTipoUsuario = Convert.ToInt32(tipo.SelectedValue);
                Rol.NombreTipoUsuario = tipo.SelectedItem.Text;

                oConexion.TipoUsuarios.AddObject(Rol);
                oConexion.SaveChanges();
                bool n = true;

                if (n == true)
                {
                    txtCedula.Text = "";
                    Response.Write("<script LANGUAGE='JavaScript' >alert('Se Asigno el Rol Correctamente')</script>");
                }

            }
        }