c# async await example

The addition of threads in C++11 allows us to create threads very conveniently, and its basic usage is this:void f (int n); Std::thread t (f, n + 1); T.join ();But the thread is a relatively low-level thing, sometimes use some inconvenience, such as I want to get the results of the thread function, I can not directly through the Thread.Join () to get results, then you have to define a variable, the thread function to assign a value to the variable, an

("Step2 current ThreadID" + Thread.CurrentThread.ManagedThreadId); }We can see that Step2 is very simple, there is no delay, is to output a paragraph on the screen, and Step1 is more complicated, it is an asynchronous method, and use Task.run to open two new threads, and the firstThe running time of a thread is 3 seconds, very long, haha, the second one is to output a paragraph on the screen! Now what happens when we write Step1 and Step2 together?var New threadtest (); test. Step1 ();

New features in C ++ 11: std: ure and std: async Let's start with an episode. Baidu Translation:Std: future Imagine that you want a thread to do something and then return you a result. At the same time, if you are doing some other work, it may not take you some time. You want to get the results of that thread at a specific time.In win32, you canUse CreateThread to start a threadIn the thread, start the task

){PrintCurrThreadInfo("Main()");for(inti = 0; i {PostAsync();} Console.ReadLine();} staticvoidFooCallBack(IAsyncResult ar){PrintCurrThreadInfo("FooCallBack()");AsyncFoo caller = (AsyncFoo)ar.AsyncState; caller.EndInvoke(ar);}}} The output of the example code for asynchronous and multithreaded differences is as follows:Thread Id of Main () is:1,The current thread is the not thread pool thread.Thread Id of Foo () Is:3,The current thread is the t

){PrintCurrThreadInfo("Main()");for(inti = 0; i {PostAsync();} Console.ReadLine();}staticvoid FooCallBack(IAsyncResult ar){PrintCurrThreadInfo("FooCallBack()");AsyncFoo caller = (AsyncFoo)ar.AsyncState; caller.EndInvoke(ar);}}} The output of the example code for asynchronous and multithreaded differences is as follows:Thread Id of Main () is:1,The current thread is the not thread pool thread.Thread Id of Foo () Is:3,The current thread is the t

[] args) {Printcurrthreadinfo ("Main ()"); for(inti =0; I -; i++) {Postasync (); } console.readline (); } Static voidfoocallback (IAsyncResult ar) {printcurrthreadinfo ("Foocallback ()"); Asyncfoo Caller=(Asyncfoo) ar. asyncstate; Caller. EndInvoke (AR); } }}The output of the example code for asynchronous and multithreaded differences is as follows:Thread Id of Main () is:1,The current thread is the not thread p

is required A thread-safe collection (for example, concurrentdictionary) is completely different. Unlike immutable collections, a thread-safe collection can be modified. The thread-safe collection itself contains all the synchronization capabilities There are four important guidelines for the use of locks Limit the scope of a lock (for example, to set the object used by the lock stat

example: "218.108.242.108" strarea_ip[1] IP address region information String No for example: "Hangzhou, Zhejiang" The following is the IP parameter that is passed in to obtain the region to which it belongs: According to the third party website (WebService provider), to obtain the IP address of the client by crawling the Internet IP address of the computer on this website.Of course, if that day this sit

an array that contains IP information String [] Whether For example: count=2, which indicates an array length of 2 (0,1) STRAREA_IP[0] IP address requested by the client String Whether For example: "218.108.242.108" STRAREA_IP[1] IP Address Region information String Whether For example