アプリケーションに 2 つのスレッドを作成しました。最初のスレッドはメインの UI スレッドで、以下のクエリのような通常のジョブを実行します。
var order = db.Orders.Where(x=>x.systemId==id).ToList();
他のスレッドは、処理する警告状況があるかどうかを確認しています。コードは次のとおりです。
TransactionOptions transOptions = new TransactionOptions()
{ IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted };
using (new TransactionScope(TransactionScopeOption.Required, transOptions))
{
BathDBDataContext dc = new BathDBDataContext(connectionString);
var all_menus = dc.Menu.Where(x => x.addAutomatic);
var menus = all_menus.Select(x => x.name).ToList();
var orders = dc.Orders.Where(x => menus.Contains(x.menu) && !x.paid && x.deleteEmployee == null);
var add_menus = orders.Select(x => x.menu).Distinct();
var ids = orders.Select(x => x.systemId).Distinct();
foreach (var systemId in ids)
{
var seat_orders = orders.Where(x => x.systemId == systemId);
foreach (var add_menu in add_menus)
{
var add_orders = seat_orders.Where(x => x.menu == add_menu && (x.priceType == null || x.priceType != "stop counting"));
if (add_orders.Count() == 0)
continue;
var max_time = add_orders.Max(x => x.inputTime);
var max_order = add_orders.OrderByDescending(x => x.inputTime).FirstOrDefault();
//var max_order = add_orders.FirstOrDefault(x => x.inputTime == max_time);
if (max_order == null || max_order.priceType == "per hour")
continue;
var the_menu = all_menus.FirstOrDefault(x => x.name == add_menu);
string menu_time = the_menu.timeLimitHour.ToString() +
":" + the_menu.timeLimitMiniute.ToString() +
":" + the_menu.timeLimitSecond.ToString();
TimeSpan tsm = TimeSpan.Parse(menu_time);
if (DateTime.Now - max_order.inputTime < tsm)
continue;
if (the_menu.addType == "by unit")
{
Orders new_order = new Orders();
new_order.menu = max_order.menu;
new_order.text = max_order.text;
new_order.systemId = systemId;
new_order.number = 1;
new_order.money = the_menu.price;
new_order.technician = max_order.technician;
new_order.techType = max_order.techType;
new_order.inputTime = DateTime.Now;
new_order.inputEmployee = "computer";
new_order.paid = false;
dc.Orders.InsertOnSubmit(new_order);
}
else if (the_menu.addType == "by time")
{
Orders new_order = new Orders();
new_order.menu = max_order.menu;
new_order.text = max_order.text;
new_order.systemId = systemId;
new_order.number = 1;
new_order.priceType = "per hour";
new_order.money = Convert.ToDouble(the_menu.addMoney);
new_order.technician = max_order.technician;
new_order.techType = max_order.techType;
new_order.inputTime = DateTime.Now;
new_order.inputEmployee = "computer";
new_order.paid = false;
dc.Orders.InsertOnSubmit(new_order);
}
}
dc.SubmitChanges();
}
この状況では、メイン UI スレッドのクエリが非常に遅くなるか、場合によっては機能しなくなることさえあります。
誰でも私を助けることができますか?