asynchronous programming c#

C # asynchronous programming 2 EAP asynchronous program development, I recorded the knowledge of C # APM asynchronous programming in the previous blog. Today I will share with you the k

C # asynchronous programming 3 TPL Task asynchronous program development, . Net added the task parallel library in Framework4.0, which makes it easier for developers to use multi-core and multi-threaded CPU environments. TPL is meeting the technical requirements of our series. Because TPL involves a lot of content and

C # asynchronous programming 4 async and await asynchronous program development, With the development of C # asynchronous program series, you will find it easier to write asynchronous p

Asynchronous Programming in C # Processes and Threads The system creates a process in memory when the program is started. A process is a collection of resources required for a program to run, including virtual address space, file handles, and what other programs need to run. Inside the process, the system creates a kernel object called a thread that represents

("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 tog

C #~ Asynchronous programming continues ~ Parallel async Asynchronous Method and synchronous method, Parallel Programming awit async articles C # asynchronous

) = A 　　 { -Console.WriteLine ($"Current Progress {args}%"); - 　　 }; the 　　 //Invoke Report Method - 　　 awaitCharpt1.Charpt1.ProgressAsync (Token.token, progress); -}The main method to execute is as follows:1 Static voidMain (string[] args)2 {3 　　 progresstest ();4 　　 varKey =Console.readkey ();5 　　 //Cancel task When input character is J6 　　 if(Key. KeyChar = ='J')7 　　 {8 　　　　 Token.cancel ();9Console.WriteLine ("The task was canceled! ");Ten 　　 } One 　　 console.readline (); A}When

- /// - /// + Private Static AsyncTask Doexceptionasync () - { + Try A { at awaitTask.run (() = {Throw NewException ();}); - } - Catch(Exception) - { -Console.WriteLine ($"{nameof (Doexceptionasync)} An exception occurred! "); - } in } -}Figure 1-1The parse await expression is in the try block and handles the exception in a normal manner. However, why the status in t

. After the function in the new thread is finished, return Result will be returned by the new thread (this is not the calling thread, but the task.result that the calling thread gets from the new thread). 5. When an await Task or task.result is used in the calling thread, the calling thread waits (blocks) for the new thread to complete and obtain the result. The program output is as follows: As we described earlier, the. Net Framework4.5 post-related io,net and so on are all supported for async

( -); Console.WriteLine ("asynchronous method Execution Complete"); return awaitDownloadtask; } } }The execution order is shown as Console.WriteLine. The downloadstringwithtimeout is executed with the following code, approximately 2 seconds. var str= result. Result; The asynchronous method will wait for the async method to execute when it calls the return value.Down to remove some cod

[] args) { varTaska = Delayandrerutnasync (2); varTASKB = Delayandrerutnasync (3); varTASKC = Delayandrerutnasync (1); vartasks =New[] {Taska, TASKB, TASKC}; varProcessingtasks = tasks. Select (AsyncTask = { varresult =awaittask; Console.WriteLine (result); }); Task.whenall (Processingtasks); Console.read (); } Static Asynctaskint> Delayandrerutnasync (intval) { awaitTask.delay (Timespan.fromseconds (V

C ++ asynchronous programming library based on Fiber (I): Principle and example, fiber asynchronous Fiber and coroutine are similar concepts, such as user-level threads or light threads. Windows provides a set of APIS for users to create and use fiber courses. The libraries in this article are implemented based on this

card, sound card, video card and so on have direct memory access function. The asynchronous programming model allows us to take full advantage of the direct memory access of the hardware to release the CPU pressure. Scenarios for both: Compute-intensive work, using multithreading. IO-intensive work, using asynchronous mechanisms. 4.

C # Programming Summary (VI) Asynchronous Programming 1, what is async?Asynchronous operations are typically used to perform tasks that may take a long time to complete, such as opening large files, connecting to a remote computer, or querying a database. An

[Reading Notes] C # advanced programming Chapter 1 asynchronous programming, (1) Importance of asynchronous programming In asynchronous programming