906 questions
402
votes
10
answers
80k
views
Why use async and return await, when you can return Task<T> directly?
Is there any scenario where writing method like this:
public async Task<SomeResult> DoSomethingAsync()
{
// Some synchronous code might or might not be here... //
return await ...
- 5,446
161
votes
6
answers
102k
views
'await' works, but calling task.Result hangs/deadlocks
I have the following four tests and the last one hangs when I run it. Why does this happen:
[Test]
public void CheckOnceResultTest()
{
Assert.IsTrue(CheckStatus().Result);
}
[Test]
public async ...
- 17.6k
446
votes
2
answers
459k
views
When correctly use Task.Run and when just async-await
I would like to ask you on your opinion about the correct architecture when to use Task.Run. I am experiencing laggy UI in our WPF .NET 4.5
application (with Caliburn Micro framework).
Basically I am ...
- 6,349
421
votes
13
answers
224k
views
Awaiting multiple Tasks with different results
I have 3 tasks:
private async Task<Cat> FeedCat() {}
private async Task<House> SellHouse() {}
private async Task<Tesla> BuyCar() {}
They all need to run before my code can continue ...
- 68.7k
193
votes
4
answers
232k
views
How to cancel a Task in await?
I'm playing with these Windows 8 WinRT tasks, and I'm trying to cancel a task using the method below, and it works to some point. The CancelNotification method DOES get called, which makes you think ...
- 25.9k
445
votes
3
answers
409k
views
Task vs Thread differences [duplicate]
There are two classes available in .NET: Task and Thread.
What is the difference between those classes?
When is it better to use Thread over Task (and vice-versa)?
- 12k
166
votes
13
answers
211k
views
How do I abort/cancel TPL Tasks?
In a thread, I create some System.Threading.Task and start each task.
When I do a .Abort() to kill the thread, the tasks are not aborted.
How can I transmit the .Abort() to my tasks ?
- 4,566
103
votes
4
answers
203k
views
Platform.runLater and Task in JavaFX
I have been doing some research on this but I am still VERY confused to say the least.
Can anyone give me a concrete example of when to use Task and when to use Platform.runLater(Runnable);? What ...
- 20.5k
136
votes
2
answers
73k
views
Await on a completed task same as task.Result?
I'm currently reading "Concurrency in C# Cookbook" by Stephen Cleary, and I noticed the following technique:
var completedTask = await Task.WhenAny(downloadTask, timeoutTask);
if (completedTask ==...
- 3,320
155
votes
16
answers
139k
views
Run PHP Task Asynchronously
I work on a somewhat large web application, and the backend is mostly in PHP. There are several places in the code where I need to complete some task, but I don't want to make the user wait for the ...
- 19.1k
516
votes
13
answers
443k
views
How to safely call an async method in C# without await
I have an async method which returns no data:
public async Task MyAsyncMethod()
{
// do some stuff async, don't return any data
}
I'm calling this from another method which returns some data:
...
- 9,479
16
votes
1
answer
6k
views
JavaFX2: Can I pause a background Task / Service?
I am trying to set up a background service that would perform bulk loading of transaction data from a csv file. This background service would be initiated from a menu item action mapped to a method in ...
- 173
64
votes
9
answers
117k
views
Android: Cancel Async Task
I use an async task to upload an image and get some results.
While uploading the image I see a progress dialog, written in onPreExecute() method like this:
protected void onPreExecute() {
...
- 3,869
130
votes
9
answers
127k
views
How can I call an async method in Main?
public class test
{
public async Task Go()
{
await PrintAnswerToLife();
Console.WriteLine("done");
}
public async Task PrintAnswerToLife()
{
int answer = ...
- 2,242
70
votes
11
answers
93k
views
How to limit the maximum number of parallel tasks in C#
I have a collection of 1000 input message to process. I'm looping the input collection and starting the new task for each message to get processed.
//Assume this messages collection contains 1000 ...
- 1,429