.net 4.5 では、非同期メソッドを簡単に呼び出すことができる await, async キーワードがあることを認識しています。私は現在、C# 4.0 で非同期呼び出しを行う方法を研究しています。私がしたい例は、データグリッドがデータバインドされている場所で非同期呼び出しを行うことです。
いくつかのリンクを提供していただければ、本当に感謝しています。
質問する
14470 次
3 に答える
7
Tasks の使用をご覧ください。これは .Net 4 で利用可能であり、役立つはずです。簡単な例は次のようになります。
public void MainFlow()
{
Task taskWork = Task.Factory.StartNew(new Action(DoWork));
//Do other work
//Then wait for thread finish
taskWork.Wait();
}
private void DoWork()
{
//Do work
}
詳しくはこちらをご覧ください
于 2012-11-07T09:05:03.663 に答える
1
非同期操作を実行するためのツール クラスを作成しました。
これらのメソッドが実際に行うこと: アクションを非同期的に実行し、同期コンテキストに従って完了の実行を通知します。
これをTPLのラッパーとして作成し、長時間実行される操作を呼び出すときにWPFで簡単に使用できるようにしました。このクラスには、放棄するだけでなく、キャンセルできるアクションの類似物もあります。
public static class AsyncExecutor
{
public static CancellationTokenSource ExecuteBlockingOperation(Action action, Action completition, Action<AggregateException> onException)
{
if (action == null)
throw new ArgumentNullException("action");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task(action, TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition();
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn>(Action<TIn> action, TIn parameter, Action<TIn> completition, Action<AggregateException, TIn> onException)
{
if (action == null)
throw new ArgumentNullException("action");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task(() => action(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TOut>(Func<TOut> func, Action<TOut> completition, Action<AggregateException> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(func, TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(asyncPart.Result);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TOut, TIn> completition, Action<AggregateException, TIn> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(asyncPart.Result, parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TOut> completition, Action<AggregateException, TIn> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(asyncPart.Result);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TIn> completition, Action<AggregateException, TIn> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action completition, Action<AggregateException, TIn> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition();
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TIn> completition, Action<AggregateException> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TOut, TIn> completition, Action<AggregateException> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(asyncPart.Result, parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TOut> completition, Action<AggregateException> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition(asyncPart.Result);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static CancellationTokenSource ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action completition, Action<AggregateException> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var cts = new CancellationTokenSource();
var token = cts.Token;
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (!token.IsCancellationRequested)
completition();
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
return cts;
}
public static void ExecuteBlockingOperation(Action action, Action completition, Func<bool> shouldComplete, Action<AggregateException> onException)
{
if (action == null)
throw new ArgumentNullException("action");
if (completition == null)
throw new ArgumentNullException("completition");
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task(action, TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (shouldComplete == null || shouldComplete())
completition();
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
}
public static void ExecuteBlockingOperation<TIn>(Action<TIn> action, TIn parameter, Action<TIn> completition, Predicate<TIn> shouldComplete, Action<AggregateException, TIn> onException)
{
if (action == null)
throw new ArgumentNullException("action");
if (completition == null)
throw new ArgumentNullException("completition");
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task(() => action(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPart =>
{
if (shouldComplete == null || shouldComplete(parameter))
completition(parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
}
public static void ExecuteBlockingOperation<TOut>(Func<TOut> func, Action<TOut> completition, Predicate<TOut> shoudComplete, Action<AggregateException> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(func, TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler);
task.ContinueWith(asyncPartTask =>
{
if (shoudComplete == null || shoudComplete(asyncPartTask.Result))
completition(asyncPartTask.Result);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
}
public static void ExecuteBlockingOperation<TIn, TOut>(Func<TIn, TOut> func, TIn parameter, Action<TOut, TIn> completition, Func<TOut, TIn, bool> shouldComplete, Action<AggregateException, TIn> onException)
{
if (func == null)
throw new ArgumentNullException("func");
if (completition == null)
throw new ArgumentNullException("completition");
var scheduler = TaskScheduler.FromCurrentSynchronizationContext();
var task = new Task<TOut>(() => func(parameter), TaskCreationOptions.LongRunning);
task.ContinueWith(asyncPartTask => onException(asyncPartTask.Exception, parameter), CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted, scheduler); // on Exception
task.ContinueWith(asyncPart =>
{
if (shouldComplete == null || shouldComplete(asyncPart.Result, parameter))
completition(asyncPart.Result, parameter);
},
CancellationToken.None, TaskContinuationOptions.OnlyOnRanToCompletion, scheduler);
task.Start();
}
}
于 2012-11-07T10:55:16.570 に答える
1
タスクが完了すると、基本的にアクションを実行する Task.ContinueWith を使用します。
役に立つかもしれないいくつかの例:
于 2012-11-07T09:07:46.317 に答える