C# (CSharp) Price_UserDB.SelectPrice примеры использования

Пример #1

 private void comboBox4_TextChanged(object sender, EventArgs e)
 {
     if (comboBox4.SelectedIndex != -1)
     {
         Price_UserDB price_User = new Price_UserDB();
         textBox1.Text = price_User.SelectPrice(comboBox4.Text, Data.User.ID1).ToString();
     }
 }