asynchronous programming c#

The async/await of. NET 4.5 is really a magic thing. It's so clever that I can't help but wonder about its implementation, but it's hard to get a glimpse of its path. Unexpectedly, I read this article Asynchronous Programming in C # using Iterators, which is like a crash. Meiyu did not dare to exclusive, so I wrote this article to share some of my thoughts with t

The problem still exists.Previously written related articles asynchronous programming articles, this article is mainly a little supplement, before the IIS often send w3wp process no hanging, but has not been able to find the real reason, and find relevant information, find some related articles, such as await and async caused by thread deadlock , have also been analyzed, but the situation with our project i

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 ~)。 C

delegates, and the other two accept an argument of type object.TaskFactory in MSDN. StartNew's note information is as follows:They can either call the Wait method to block the current thread, or they can get the return value through Task.result, which, of course, blocks the current thread.Then say the usual continuewith, this is a continuation of the execution of a task, similar to callbackvar task = task.factory.startnewintreturn1;}); Console.WriteLine (Task. Result); var result = task. contin

. Using the Joinmulticastgroup method, you can subscribe udpclient to multicast packets. You can also use the Dropmulticastgroup method to cancel a udpclient from a multicast-grouped subscription.This section describes using UdpClient to implement an asynchronous high-performance UDP serverUdpClient Asynchronous UDP ServerUsing system;using system.collections.generic;using system.linq;using system.text;usin

C # There are four asynchronous programming methods. refer to the following Article Msdn-asynchronous programming Overview [C #] In addition, the msdn help documentation also provides relevant introductions. Msdn: MS-help: // Ms

Synchronization: If you call a method in your code, you must wait until all of the code in the method has finished executing before you can return to the original place to execute the next line of code.Async: Executes the next line of code if you do not wait for the calling method to finish executing.1.0 Synchronization Examples:1 class Program2 {3 Private Static intCalculate (intAintb)4 {5Console.WriteLine ("1. Start counting! ");6 7System.Threading.Thread.Sleep ( +*3);//If

-performance asynchronous UDP server, in fact, UDP is not divided between the client and the server, but we sometimes communicate with the server is using UDP to do.Socket Asynchronous UDP ServerUsing system;using system.collections.generic;using system.linq;using system.text;using System.Net;using System.net.sockets;namespace netframe.net.udp.sock.asynchronous{//Session Encapsulation ClassUsing system;usin

. Net frameworks5.0 is mainly engaged in asynchronous programming APM. It is not a new thing in fact, but a Microsoft encapsulation of concepts such as the previous thread, proposing keywords such as await and async, the Task class is referenced, which greatly simplifies the development of APM. Next we will introduce the application of APM through a specific example.Instance description There is a WEB-orien

. // - 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. return urlContents.Length; } void DoIndependentWork()

value type of the method Public Statictaskstring> Getsha1async (stringfileName) { //Creating thread pool threads using Task.run (Action) returnTask.run (() = { stringSha1str =""; if(File.exists (fileName)) {FileStream File=NewFileStream (FileName, FileMode.Open); byte[] SHA1 = SHA1. Create (). ComputeHash (file);//calculating the SHA1 of a filefile. Close (); //use Bitconverter to convert the SHA1 byte array to a 16-bina

In this article, we will take a big step forward by programming the server in asynchronous mode to make it a real server: Multiple client requests can be processed. But before we start, we need to solve a problem left over from the previous section.Message sending Problems This problem is: when the client writes data (such as a string) to the stream twice, we regard the two writes as two requests; however,

I created a WinForm test project: The interface is as follows:Set up:Here's the code:usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Threading;usingSystem.Threading.Tasks;usingSystem.Windows.Forms;namespaceasynccallbackdemo{ Public Partial classForm1:form { PublicForm1 () {InitializeComponent (); Objmycal=ExecuteTask; } //define a delegate Public Delegate intMycalculator (intN

: task. Start (); 6: For (int i = 0; i 7: { 8: Console.WriteLine ("Running in Main thread."); 9: Thread.Sleep (500); Ten: } 11: : Console.read (); 13:} If you are passing a parameter to a thread, the overload provided by the task constructor can pass in an argument of type object: "Hello World"); 2:task. Start (); Here is the threading method with the parameter: void Taskmethodwithparameter (object param)

. Both of these methods will block. If you want to avoid blocking, you can first use the Pending method to determine whether a connection request is available in the queue.Although the TcpListener has been packaged relatively good, we use it in the construction of a relatively good asynchronous TCP server, here is still the same as the first two chapters, give the server code, the code is very detailed comments, I will also give the relevant encapsula

A task can also constitute a hierarchy. When a task starts a new task, a hierarchy is started. The following code snippet creates a task in the parent task. The code for creating a subtask is the same as that for creating a parent task. The only difference is that a subtask is created from another task: 1: static void Main(string[] args) 2: { 3: Task parentTask = new Task(ParentTask); 4: parentTask.Start(); 5: 6: Console.Read(); 7: } 8: 9: static void Par

); }); consumer_seq_number++; }); - WuyiConsumer_seq_number =0; the - for(inti =0; i ) Wu { - Fib_producer.resume (); About $ while(Product_count >0) - { - Consumer_array[consumer_seq_number].resume (); -Consumer_seq_number = (Consumer_seq_number +1) %Consumer_count; A } + } the -Is_end_time =true; $ the //wait for fiber to end the Fiber::await_all (consumer_array); theFiber::await (Fib_producer);At the end of the program, await and await_all two new

lower level, in theory, as long as there are as many processors as possible, there will be no blocked threads. Attention To get an overview of what you can achieve with these methods, take a look at Amanda Laucher's speech in Lang.net in 2009, explaining how to use F # workflows to parallelize C # programs. and achieved some impressive results: www.langnetsymposium.com/2009/speakers.aspx. In this section, we will learn how to use the. NET Framework

What are your reasons for Using Async asynchronous programming in Chapter 02nd of the asynchronous programming series? Chapter 02nd: asyncPreface At the school of Asynchronization, a garden friend recommended async in C #5.0, and did not find the Chinese version. I also happ

[. NET object-oriented programming advanced] (19) asynchronous (asynchronous) uses asynchronous creation of fast response and scalability applicationsThis section is guided by:This section focuses on the advantages and disadvantages of using asynchronous