You can write asynchronous code that looks very much like synchronous code, and let the compiler handle the complications of callback functions or continuation code.This walkthrough begins with a demonstration of a synchronous WPF application that finds and displays all the movies in the Netflix ...
这可确保在执行工作时UI能流畅运行。 privateDamageResultCalculateDamageDone(){// Code omitted:/// Does an expensive calculation and returns// the result of that calculation.} calculateButton.Clicked +=async(o, e) => {// This line will yield control to the UI while CalculateDamageDone()// p...
对async/await的支持已经存在了十多年。它的出现,改变了为 .NET 编写可伸缩代码的方式,你在不了解幕后的情况下也可以非常普遍地使用该功能。 从如下所示的同步方法开始(此方法是“同步的”,因为在整个操作完成并将控制权返回给调用方之前,调用方将无法执行任何其他操作): 代码语言:javascript 复制 // Synchronously...
首先,捕获(和还原)UI/ASP.NET 上下文是透明完成的: //WinForms example (it works exactly the same for WPF).privateasyncvoidDownloadFileButton_Click(objectsender, EventArgs e) {//Since we asynchronously wait, the UI thread is not blocked by the file download.awaitDownloadFileAsync(fileNameTextBox.T...
So führen Sie den Code als WPF-App aus: Fügen Sie diesen Code in die MainWindow-Klasse in „MainWindow.xaml.cs“ ein. Fügen Sie einen Verweis auf „System.Net.Http“ hinzu. Fügen Sie eine using-Anweisung für „System.Net.Http“ hinzu. So führen Sie den Code als Windows St...
Programs using HTTP requests– Depending on the request, HTTP calls can take a long time to fully process. Using async code can let you perform other work while waiting for the server to respond. HTTP GET request example Programs using UI elements– WPF apps or any apps using buttons, text...
这将把ComputeMessage的工作卸载到一个线程池线程上(以便在处理时保持UI的响应性),然后当这项工作完成时,将一个委托排队回到与button1关联的线程以更新button1的标签。这很容易。WPF也有类似的功能,只是使用了其Dispatcher类型: private void button1_Click(object sender, RoutedEventArgs e) ...
Simplify code, remove anything that isn't strictly required to reproduce the problem. The stack trace suggests an OnPaint call happened after the browser has been Disposed. Once the example has been simplified it should made this easy enough to debug. amaitlandchanged the title [-]Cef crashes...
AsyncActionCommand brings in asynchronous method support, yet also implements ICommand seamlessly, making it compatible with the built-in commanding infrastructure of UWP, WPF, Xamarin Forms, and Codon's Xamarin Android binding system.In this post you look at using the AsyncActionCommand. You see ...
To run the code as a WPF app: Paste this code into theMainWindowclass in MainWindow.xaml.cs. Add a reference to System.Net.Http. Add ausingdirective for System.Net.Http. To run the code as a Windows Store app: Paste this code into theMainPageclass in MainPage.xaml.cs. ...