//Заполнение комбо-бокса
private void cbUFill()
{
DBConnection2 connection = new DBConnection2();
connection.UslugiFill();
cbUsluga_ID.ItemsSource = connection.dtUsluga.DefaultView;
cbUsluga_ID.SelectedValuePath = "ID_Usluga";
cbUsluga_ID.DisplayMemberPath = "Name_Of_Usluga";
}
//Заполнение датагрида
private void dgFill(string qr)
{
DBConnection2 connection = new DBConnection2();
DBConnection2.qrUsluga = qr;
connection.UslugiFill();
dgUslugi.ItemsSource = connection.dtUsluga.DefaultView;
dgUslugi.Columns[0].Visibility = Visibility.Collapsed;
}