Downloadfileasync cannot await void

Author: vmok

August undefined, 2024

WebNov 1, 2024 · Your method is async so ideal implementation will be await Task.Delay (3000) Thread.Sleep is going to block your current thread and Task.Delay is going to delay logically without blocking your current thread. Thread.sleep should not be used in asynchronous operation instead we should use Task.Delay (3000) and vice versa. Share Improve this … WebMay 30, 2024 · You should avoid async void for several reasons, one of which is composability. If the method cannot be made to return Task (e.g., it's an event handler), then you can use SemaphoreSlim to have the method signal when it is about to exit. Consider doing this in a finally block. Share Improve this answer Follow answered Nov …

client - C# DownloadFileAsync problem [SOLVED] DaniWeb

WebDec 15, 2024 · 8. First, you should declare the three smaller tasks as Task instead of Task, otherwise you won't get anything in res. Of course, that's not a problem if you don't need anything in res. The more important issue here is that you should use WhenAll instead of WaitAll. The former returns a Task or Task for you to await, whereas the ... WebFeb 11, 2013 · After launching the DownloadFileAsync, you must do a. while (wc.IsBusy){ Application.Doevents();} to wait for completion in the current thread, then you can finish. (see this) Hope this helps. 3. 0. Ketsuekiame commented: Ah yes, I missed this. Effectively the op will start the download and then it will exit. +8. rpm bally nice

c# - Properly Using await - Stack Overflow

WebApr 2, 2024 · WebClient webClient = new WebClient (); webClient.DownloadFileCompleted += new AsyncCompletedEventHandler (Completed); … WebNov 5, 2012 · Following this example, you first create the async task wtih, then get its result using await: Task downloadStringTask = client.DownloadStringTaskAsync (new Uri (uri)); string result = await downloadStringTask; Share Improve this answer Follow edited Feb 20, 2016 at 19:17 l0pan 466 7 11 answered Nov 5, 2012 at 21:49 McGarnagle WebApr 3, 2024 · public void getFile() { var pathToNewFolder = cacheDir; Directory.CreateDirectory(pathToNewFolder); try { WebClient webClient = new WebClient(); webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed); rpm automotive roosevelt blvd

c# - Zip download and extract exception - Stack Overflow

WebJan 8, 2014 · await WebClient.DownloadFileAsync (...) DownloadFileAsync is fires an asynchronous operation and returns a task that will complete when the operation ended. … WebDec 14, 2024 · Looks like WebClient.DownloadFileAsync returns 'void'. This doesn't work with await. To simplify: the 'await' operator works by taking a Task or Task and "pausing" the method until the task is complete. You should see if you can rewrite your sample using a newer API like HttpClient and GetStreamAsync. Share Improve this … rpm backgroundWebDownloadFileAsync also started in the UI context, but then stepped out of its context by calling ConfigureAwait (false). The rest of DownloadFileAsync runs in the thread pool context. However, when DownloadFileAsync completes and DownloadFileButton_Click resumes, it does resume in the UI context. rpm automotive richmond va

"" - Downloadfileasync cannot await void

Downloadfileasync cannot await void

How to stop main thread till the downloading of file completed

WebSep 12, 2024 · WebClient.DownloadFileAsync doesn't throw exceptions on HTTP request failures. You need to subscribe to the DownloadFileCompleted event to get notified of errors. However, I don't recommend messing with event handler callbacks once we have the task-based async/await feature in C#: WebClient.DownloadFileTaskAsync is much more … WebDownloadFileAsync also started in the UI context, but then stepped out of its context by calling ConfigureAwait (false). The rest of DownloadFileAsync runs in the thread pool context. However, when …

Did you know?

WebJan 6, 2024 · @dr.null It's not about awaiting an async call in an async void method, it's DownloadFileAsync that is not awaitable. It's an AsyncOperation, i.e., it's asynchronous in the old terms, driven by events, it cannot be handled as a Task, simply because it's not. – WebSorted by: 1. As others have pointed, The two methods shown are either not asynchronous or not awaitable. First, you need to make your download method awaitable: private async static Task DownloadAsync (string url, string filePath) { using (var webClient = new WebClient ()) { IWebProxy webProxy = WebRequest.DefaultWebProxy; …

WebFeb 17, 2024 · True, it's not a case of an async void delegate. The thing is that the DownloadFileAsync returns a Task, and the PLINQ knows nothing about tasks. So all the tasks created by the DownloadFileAsync method are just ignored, they are not await ed, and so they become fire-and-forget tasks. – Theodor Zoulias Feb 18, 2024 at 5:24 2 WebMay 31, 2013 · WebClient DownloadFileAsync () blocks thread. I'm trying to download a large file (500 mb) from my webserver using WPF and MVVM. Thus the following properties are all bound to some kind of controls (progressbar). The problem is, that the application still hangs, even while using DownloadFileAsync. The file is being downloaded as I can tell …

WebJun 3, 2016 · @Xami3 I'm getting exception @ await webClient.DownloadFileAsync (new Uri (strUri), strDestFilename); as Cannot await void . Wednesday, July 22, 2015 10:55 AM. text/html 7/22/2015 11:15:18 AM ... but if it is giving exception saying "Cannot await void" then it does not return a Task. plz hide loader in the completed event of the webclient. ... WebMay 22, 2015 · The "UploadAsync" method does not return any value, that's what it seems if you say "Cannot await 'void'" Try removing "LiveOperationResult operationResult =" from the line of code and just write - await this.liveClient.UploadAsync ("/me/skydrive", fileName, e.ImageStream, OverwriteOption.Overwrite); Same for the second line of code-

WebMar 11, 2024 · 2 Answers. Sorted by: 0. Look at the error, there's already a file with that name! You must either delete the directory, before you use ZipFile.ExtractToDirectory method OR use the method, that will overwrite existing directory: ZipFile.ExtractToDirectory (zipPath, extractPath, true); Share. Improve this answer. Follow.

WebJan 15, 2024 · There is a newer DownloadDataTaskAsync method that allows you to await the result. It is simpler to read and easier to wire up by far. I'd use that... var client = new WebClient (); var data = await client.DownloadDataTaskAsync (new Uri (imageUrl)); await outstream.WriteAsync (data, 0, data.Length); Share Improve this answer Follow rpm automotive river city marketplaceWebMay 17, 2016 · Normally if a function has an async variant it is the async-await version. Instead of void it returns Task and instead of TResult it returns Task . Alas WebClient already has an DownloadFileAsync. Therefore they created a DownloadFileTaskAsync. That one returns an (awaitable) Task – Harald Coppoolse … rpm bantryWebJun 3, 2015 · Create a WebClientAsync class that implements the timer in the constructor. This way you aren't copying and pasting the timer code into every implementation. public class WebClientAsync : WebClient { private int _timeoutMilliseconds; public EdmapWebClientAsync (int timeoutSeconds) { _timeoutMilliseconds = timeoutSeconds * … rpm based