protected void Button1_Click(object sender, EventArgs e)
 {
     using (CompanyEntities_2 Ent = new CompanyEntities_2())
     {
         if (Label1.Text != string.Empty)
         {
             int Id         = int.Parse(Label1.Text);
             var UserToEdit = Ent.Users.Where(R => R.IdUsuario == Id).First();
             UserToEdit.Name      = TextBox1.Text;
             UserToEdit.email     = TextBox2.Text;
             UserToEdit.birthDate = TextBox3.Text;
             Ent.SaveChanges();
             CleanControls();
         }
         else
         {
             User Newuser = new User();
             Newuser.Name      = TextBox1.Text;
             Newuser.email     = TextBox2.Text;
             Newuser.birthDate = TextBox3.Text;
             Ent.Users.Add(Newuser);
             Ent.SaveChanges();
         }
     }
     GridViewReloadData();
 }
 private void GridViewReloadData()
 {
     using (CompanyEntities_2 ent = new CompanyEntities_2())
     {
         GridView1.DataSource = ent.Users.ToList();
         GridView1.DataBind();
     }
 }
        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            int idUser = int.Parse(GridView1.Rows[e.RowIndex].Cells[1].Text);

            using (CompanyEntities_2 ent = new CompanyEntities_2())
            {
                var UserToDelete = ent.Users.Where(R => R.IdUsuario == idUser).First();;
                ent.Users.Remove(UserToDelete);
                ent.SaveChanges();
            }
            GridViewReloadData();
        }
        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            int idUser = int.Parse(GridView1.Rows[e.NewEditIndex].Cells[1].Text);

            using (CompanyEntities_2 ent = new CompanyEntities_2())
            {
                var UserToEdit = ent.Users.Where(R => R.IdUsuario == idUser).First();;
                Label1.Text   = UserToEdit.IdUsuario.ToString();
                TextBox1.Text = UserToEdit.Name;
                TextBox2.Text = UserToEdit.email;
                TextBox3.Text = UserToEdit.birthDate;
                ent.SaveChanges();
            }
            GridViewReloadData();
        }