async-await

问题 This question already has answers here : An async/await example that causes a deadlock (5 answers) Closed 2 years ago . I've got two combobox controls on my page, binded to a ObservableCollection<Vendor> and ObservableCollection<Driver>. When the page is loaded the OnWindowLoaded() is executed. When the setter of the property Vendor is triggered, OnVendorPropertyChanged is executed. When OnWindowLoaded() finishes, Vendor and Driver is being set correctly. However when I change the Vendor, the

问题 I'm getting started on async/await using. I've written simple application using WPF based on MVVM pattern, but it doesn't work as I expected. The program works as there were no asynchronous functions: after executing execute function it freezes and unfreezes only after loop function ended. Please tell me what part did I get wrong. I'd appreciate any feedback. :) Here is my modelview class. It inherits from wpf class, that contains definitions of standard wpf functions like OnPropertyChanged.

问题 However, with ASP.NET Web Api, if your request is coming in on one thread, and you await some function and call ConfigureAwait(false) that could potentially put you on a different thread when you are returning the final result of your ApiController function. Actually, just doing an await can do that. Once your async method hits an await , the method is blocked but the thread returns to the thread pool. When the method is ready to continue, any thread is snatched from the thread pool and used

问题 This question already has answers here : Difference between Task and async (2 answers) Closed 3 years ago . For example, what is the difference between this code: public async Task DoSomething(int aqq) { await DoAnotherThingAsync(aqq); } and this one: public Task DoSomething(int aqq) { DoAnotherThingAsync(aqq); } Are they both correct? 回答1: Both signatures are correct, if used properly. async Task allows you to use await keyword inside your method. The first example is totally OK. The second

问题 I am pretty much familiar with the async await but with back end nodejs . But there is a scenario came across to me where I have to use it on front end. I am getting array of objects and in that objects I am getting lat lng of the places. Now using react-geocode I can get the place name for a single lat lng but I want to use that inside the map function to get the places names. SO as we know it async call I have to use async await over there. Here is the code import Geocode from "react

问题 I ran the below code in both VS2010 and VS2012, but VS2012 only return the response.Then i searched and found, needs to enable the async and await in VS2010. Then by using AsyncCtpLibrary dll reference, i have enabled it. But still vs2010 does not return the response. static void Main(string[] args) { Task<string> task = GetCustomerDetails(); //PushCustomerDetails(); task.Wait(); var x = task.Result; } static async Task<string> GetCustomerDetails() { var httpClientHandler = new

问题 I ran the below code in both VS2010 and VS2012, but VS2012 only return the response.Then i searched and found, needs to enable the async and await in VS2010. Then by using AsyncCtpLibrary dll reference, i have enabled it. But still vs2010 does not return the response. static void Main(string[] args) { Task<string> task = GetCustomerDetails(); //PushCustomerDetails(); task.Wait(); var x = task.Result; } static async Task<string> GetCustomerDetails() { var httpClientHandler = new

问题 I have simplified the example to be able to explain it well. I have an array which I want to iterate on. For each element of the array I want to execute a test with async/await functions, so I have this code: const chai = require('chai'); const expect = chai.expect; describe('Each film', async() => { await Promise.all([1, 2, 3].map(async(n) => { await new Promise(resolve => setTimeout(() => resolve(), 1000)); console.log('N:', n); it('test', async() => { expect(true).to.be.true; }); })); });

问题 The following method loops through a list of postdata to make multiple requests for a token, for example each request uses a specific clientID. My question relates to async. I'm trying to make the calls for the token(s) to be async. Does the use of .Result necessarily make the method synchronous? public async Task<string> ReturnDataFromUrl1(List<List<KeyValuePair<string, string>>> listOfPostData) { List<Task<string>> taskList = new List<Task<string>>(); string allTokens = ""; List<Task<string

问题 I would like to send POST request in windows phone 8 environment my code is running successfully but i am getting NotFound exception. Its mean is i want to POST some data but i am sending null. So please let me know how to send POST Request asynchronously with Data in windows phone 8 environmet. I tried following links but not helpful. link link2 I approached like this private async Task<LastRead> SyncLastReadPOST(LastRead lastreads, bool actionStatus) { string jsondata = ""; actionStatus =