c# async await example

C #~ Asynchronous programming continued ~. Net4.5 main await async applications, I have written two articles about asynchronous programming before. For details, go to C #~ Asynchronous programming and C #~ Use of asynchronous programming in projects . Each version of net ha

Let's look at the example:1 void Pagepaint () 2 {3 Console.WriteLine ("Paint Start"), 4 paint (), 5 Console.WriteLine ("Paint End"), 6} 7Suppose there is a method for this page layout that renders the head, the body, and the bottom in turn, the header and the bottom are fixed content, and the body needs additional requests.Here with sleep Analog network delay, rendering method is actually the simple encapsulation of Console.WriteLine ...Af

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 progr

. // - Control resumes here when getStringTask is complete. // - The await operator then retrieves the string result from getStringTask. string urlContents = await getStringTask; // The return statement specifies an integer result. // Any methods that are awaiting AccessTheWebAsync retrieve the length value. ret

Async and await are introduced in C # 5.0. These two keywords can make it easier for you to write asynchronous code. Public classmyclass{ PublicMyClass () {displayvalue ();//There's no blocking .System.Diagnostics.Debug.WriteLine ("MyClass () End."); } PublictaskDouble> Getvalueasync (DoubleNUM1,Doublenum2) { returnTask.run (() = { f

The Async method has three possible return types: task, taskconverting from synchronous to asynchronous code, any method that returns a type T becomes an async method that returns taskThe following code snippet shows a synchronous method that returns void and its equivalent async method: void MyMethod () { //Do synchronous work. Thread.Sleep

"); }　　Thread ID Output 3 is the same reason (http://www.cnblogs.com/mushroom/p/4575417.html):There is talk that Async does not have to use the thread, there is a need to say, from a single aspect are right, also is wrong. The above source code is simple analysis, the specific async internal will involve thread context switch, thread reuse, scheduling and so on. Want to deepen the classmate can study

Source: http://blog.csdn.net/tianmuxia/article/details/17675681Async and await are introduced in C # 5.0. These two keywords can make it easier for you to write asynchronous code. Public classmyclass{ PublicMyClass () {displayvalue ();//There's no blocking .System.Diagnostics.Debug.WriteLine ("MyClass () End."); } PublictaskDouble> Getvalueasync (DoubleNUM1,Doublenum2) { returnTask.run (() =

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

Async and await are introduced in C # 5.0. These two keywords will make it easier for you to write asynchronous code. Look at an example: public class MyClass {public MyClass () { displayvalue ();//There's no blocking here. System.Diagnostics.Debug.WriteLine ("MyClass () end."); } Public task An asynchronous

C # Async and Await usage, 1 using System; 2 using System. collections. generic; 3 using System. linq; 4 using System. text; 5 using System. threading; 6 using System. threading. tasks; 7 8 namespace CloudLearning. UI 9 {10 class Program11 {12 static void Main (string [] args) 13 {14 AsyncPrintHelloWorld (); 15 Console. readLine (); 16} 17 18 public

= HotelBusiness.Instance.QueryHotelList (parameter); //Blocking IIS Threadsreturn result;}2. Add only a few keywords, it becomes asynchronous processing[HttpGet]Public Async taskhotellistresponse> List (...{...Return await Task.Factory.StartNew (() = HotelBusiness.Instance.QueryHotelList (parameter)); Operation of resource consumption, moved to asynchronous}3. After the modified code runs, the current IIS

I have written two articles on asynchronous programming, which can be entered into c#~ asynchronous programming and c#~ asynchronous programming in project useEach version of. NET has its own master-push technology, like a delegate in. NET1.1, a generic in. NET2.0 in. NET3.0, and Dynimac in the linq,.net4.0 in. The main thing in NET4.5 is asynchronous programming, and the simplest way to implement asynchron

Learn.. First, let's write an example: public class MyClass{Public MyClass (){Calling this method does not blockShowvalue ();Console.WriteLine ("MyClass () end.");}Public task{Return Task.run (() =>{for (var i = 0; i {Number1 = Number1 + number2;}return number1;});}Public async void Showvalue (){A new thread is opened here to handle the Getvalueasync task, and then the method returns immediatelyDouble resu

public class MyClass{Public MyClass (){Displayvalue (); There's no blocking.System.Diagnostics.Debug.WriteLine ("MyClass () End.");}Public task{Return Task.run (() ={for (int i = 0; i {NUM1 = num1/num2;}return NUM1;});}Public async void Displayvalue (){Double result = await Getvalueasync (1234.5, 1.01);//This will open a new thread to process the Getvalueasync task, then return the method immediatelyAll cod

Once, we may have used thread. When the main thread is running. A new thread is opened to run the new method.Today to see someone sent me a piece of code to find a not know the await, but also feel very familiar with the look, feel is the thread that the thing, check the next, found a simple way to realize multi-threaded asynchronous programming.(Ps:framework at 4.5 or more talent enough oh ~)。 Console.WriteLine ("Exit

I have written two articles on asynchronous programming, which can be entered into c#~ asynchronous programming and c#~ asynchronous programming in project useEach version of. NET has its own master-push technology, like a delegate in. NET1.1, a generic in. NET2.0 in. NET3.0, and Dynimac in the linq,.net4.0 in. The main thing in NET4.5 is asynchronous programming, and the simplest way to implement asynchron