c# async method

17675681/Async and await are introduced in C # 5.0. These two keywords can make it easier for you to write asynchronous code.Look at an example:[CSharp]View PlainCopy Public class MyClass { Public MyClass () { Displayvalue (); //There is no blocking System.Diagnostics.Debug.WriteLine ("MyClass () End."); } Public taskdouble> getvalueasync (double num1, double num2) { return Task.ru

Async and await are introduced in C # 5.0. These two keywords can make it easier for you to write asynchronous code.Look at an example: Public class MyClass { Public MyClass () { Displayvalue (); //There is no blocking System.Diagnostics.Debug.WriteLine ("MyClass () End."); } Public taskdouble> getvalueasync (double num1, double num2) { return Task.run (() = { For (int i = 0; i

In the process of programming, we encounter many scenarios that require asynchronous operations. For example, to download a file, if the download is done synchronously, then the UI action will be stuck, it is best to be able to download it asynchronously. In C #, it was early to support asynchronous operations, but earlier methods were a bit cumbersome to write. By the time C # 5.0, two keywords were added

C # 5.0 introduces two keywords async and await, and these two keywords help us to a great extent simplify the implementation code for asynchronous programming, and the task in TPL is very much related to async and await. Private async void Button1_Click (object sender, EventArgs e) {var length = Accesswebasync ();

C # synchronous and asynchronous understanding, including await and async in 5.0 (learning notes ), Previously, I used a synchronization thread, that is, the load event first written into the image, and then processed the database call in it. Later I met some old code in the company's software. When I first added functionality to the old code, I wanted to use the database data to assign some values to the i

also true in network I/O, except that the driver has become a network driver. See the following code: Public static async Task During compilation, DosomeAsync will be compiled into a state machine method. Do not worry about what the state machine is. You can treat it as a black box. When GetAsync is encountered, a Task object is returned in DoSomeAsync, and await passes the

Today, let's take a look at the implementation of the same functionality under ASP. NET MVC 4, which is based on async support under the. NET Framework 4.5, to make our code simpler, see the following fragment code called Index's action method: Public async task { var cnblogstask = Getstringasync ("http://www.cnblogs.com"); var

In Synchronous Programming, once an error occurs, an exception is thrown. We can use try... Catch is used to catch exceptions, but uncaptured exceptions are continuously passed up to form a simple and unified error handling mechanism. However, for asynchronous programming, exception handling has always been troublesome, which is also one of the advantages of async, await, Jscex, and other asynchronous programming models in

Async and Await in C # 5.0"Bo Master" anti-bone Aberdeen "This article" http://www.cnblogs.com/liqingwen/p/6069062.htmlAlong with the. NET 4.5 and Visual Studio 2012 C # 5.0, we can use the new async pattern, which involves the async and await keywords. There are many differ

This article mainly describes the C # of Async and await the specific use of small series feel very good, and now share to everyone, but also for everyone to do a reference. Let's take a look at it with a little knitting. Async and await are introduced in C # 5.0. These two keywords can make it easier for you to write

Recently in the development of Android, the use of multi-threading more frequent, Java Multi-threaded interface is very convenient. Thread, Aysnctask, Handler These interfaces are much more convenient than a series of interfaces provided by POSIX Pthread_create (), think c++11 also support convenient multithreaded programming, the recent Java Asynctask used more, So I learned the async task in

+= String.Format("\r\nLength of the downloaded string: {0}.\r\n", contentLength); } // Three things to note in the signature: // - The method has an async modifier. // - The return type is Task or Task // Here, it is Task // - The method name ends in "

stringtaskOperation Result:Through task. Result can be taken to the return value, if the value of the time, the background thread has not finished, it will wait for the completion of its execution!Simply mention:Task tasks can be canceled by the CancellationTokenSource class, the feeling is not used much, the usage is relatively simple, interesting words can be searched!3. async/awaitAsync/await is introduced in