This question already has answers here: Parallel foreach with asynchronous lambda (11 answers) Closed 3 months ago. In a metro app, I need to execute a number of WCF calls. There are a significant number of calls to be made, so I need to do them in a parallel loop. The problem is that the … Read more
I’m reading Kotlin Coroutine and know that it is based on suspend function. But what does suspend mean? Coroutine or function gets suspended? From https://kotlinlang.org/docs/reference/coroutines.html Basically, coroutines are computations that can be suspended without blocking a thread I heard people often say “suspend function”. But I think it is the coroutine who gets suspended because … Read more
In C# and TPL (Task Parallel Library), the Task class represents an ongoing work that produces a value of type T. I’d like to know what is the need for the Task.FromResult method ? That is: In a scenario where you already have the produced value at hand, what is the need to wrap it … Read more
I would like to handle a collection in parallel, but I’m having trouble implementing it and I’m therefore hoping for some help. The trouble arises if I want to call a method marked async in C#, within the lambda of the parallel loop. For example: var bag = new ConcurrentBag<object>(); Parallel.ForEach(myCollection, async item => { … Read more
asyncio.gather and asyncio.wait seem to have similar uses: I have a bunch of async things that I want to execute/wait for (not necessarily waiting for one to finish before the next one starts). They use a different syntax, and differ in some details, but it seems very un-pythonic to me to have 2 functions that … Read more
I have some concerns using async actions in ASP.NET MVC. When does it improve performance of my apps, and when does it not? Is it good to use async action everywhere in ASP.NET MVC? Regarding awaitable methods: shall I use async/await keywords when I want to query a database (via EF/NHibernate/other ORM)? How many times … Read more
I don’t quite understand the difference between Task.Wait and await. I have something similar to the following functions in a ASP.NET WebAPI service: public class TestController : ApiController { public static async Task<string> Foo() { await Task.Delay(1).ConfigureAwait(false); return “”; } public async static Task<string> Bar() { return await Foo(); } public async static Task<string> Ros() … Read more
Summary: I would like to call an asynchronous method in a constructor. Is this possible? Details: I have a method called getwritings() that parses JSON data. Everything works fine if I just call getwritings() in an async method and put await to left of it. However , when I create a LongListView in my page … Read more
I want to write an async method with an out parameter, like this: public async void Method1() { int op; int result = await GetDataTaskAsync(out op); } How do I do this in GetDataTaskAsync? 12 Answers 12
I have an async method: public async Task<string> GenerateCodeAsync() { string code = await GenerateCodeService.GenerateCodeAsync(); return code; } I need to call this method from a synchronous method. How can I do this without having to duplicate the GenerateCodeAsync method in order for this to work synchronously? Update Yet no reasonable solution found. However, I … Read more
