[bidaya]

كود :

if (ComboBox1.SelectedIndex < 0)
            {
                MessageBox.Show("الرجاء اختيار اسم المستخدم ");
                return;
            }
            Module1.con.Open();
            cmd = new SqlCommand("select *from users where user_name=@user_name and user_password=@user_password", Module1.con);
            cmd.Parameters.AddWithValue("@user_name", ComboBox1.Text);
            cmd.Parameters.AddWithValue("@user_password", Textpass.Text);
            rdr = cmd.ExecuteReader;
            rdr.Read();
            if (rdr.HasRows())
            {
                str_username = rdr("user_name").ToString();
                var with_1 = Form_main;
                with_1.btn_sales.Enabled = rdr("btn_sales").ToString();
                with_1.btn_customer.Enabled = rdr("btn_customer").ToString();
                with_1.btn_product.Enabled = rdr("btn_product").ToString();
                with_1.btn_users.Enabled = rdr("btn_users").ToString();
                with_1.btn_con.Enabled = rdr("btn_con").ToString();
                with_1.Show();
                this.Hide();
            }
            else
            {
                MessageBox.Show("كلمة المرور خطأ");
                Textpass.Select();
            }
            rdr.Close();
            Module1.con.Close();