public async static Task SaveOrdersAsync(OrderService oService, OrderItemService oiService, IEnumerable<OrderTemplate> toSaveList, IUnitOfWork uow, IProgress<string> progress)
{
var toSave = toSaveList as IList<OrderTemplate> ?? toSaveList.ToList();
var tasks = new Task[toSave.Count()];
for (var i = 0; i < tasks.Length; i++)
{
var i1 = i;
tasks[i] = new Task(() => SaveToDb(oService, oiService, toSave.ElementAt(i1), uow), TaskCreationOptions.PreferFairness);
var message = string.Format("- Order: {0} has been resaved.\n", toSave.ElementAt(i1).Order.FriendlyId);
if (progress != null)
progress.Report(message);
}
await Task.WhenAll(tasks);
}
目前,我已经测试了以上内容,并且认为任务尚未启动,因为进度条仍在循环。我的假设是Task.WhenAll应该为我启动任务 - 这是我所想的吗?
还是应该在循环中使用它:
tasks[i] = Task.Run(() => SaveToDb(oService, oiService, toSave.ElementAt(i1), uow));
我认为我已经接近正确了,只是想要有人告诉我是否做得正确。
反馈已整合版本:
public async static Task SaveOrdersAsync(OrderService oService, OrderItemService oiService, IEnumerable<OrderTemplate> toSaveList, IUnitOfWork uow, IProgress<string> progress)
{
var saveList = toSaveList as IList<OrderTemplate> ?? toSaveList.ToList();
var saveTask = Task.Run(() =>
{
foreach (var ot in saveList)
{
SaveToDbBatch(oService, oiService, ot);
var message = string.Format("- Order: {0} has been resaved.\n", ot.Order.FriendlyId);
if (progress != null)
progress.Report(message);
}
});
await saveTask;
await Cache.UoW.SaveAsync();
}