asynchronous c#

VS. NET (C #) Database Interface: SqlCommand object asynchronous execution case code, vs.net When executing the Command object Command, you must wait until the Command is complete before other operations can be executed. For example, if you execute the ExcuteNonQuery () method, the application will remain blocked until the data operation is completed successfully, or the connection is terminated abnormally

Ten //resumes the flow of execution contexts between asynchronous threads One Executioncontext.restoreflow (); A //...Execution Result:Name:mikeName:Three-Collaborative cancellation1 //delegate invoked when registering to cancel Cancelationtoken2 varCTS =NewCancellationTokenSource ();3Cts. Token.register (() = Console.WriteLine ("The operation would be cancelled.--1"));4Cts. Token.register (() = Console.WriteLine ("The operation would be cancelled.--

Directory A lightweight and efficient multithreaded C++stream style asynchronous log (ii) Objective LogFile Class Asynclogging class Asynclogging implementation Add Alternate Cache Conclusion A lightweight and efficient multithreaded C++stream style asynchronous log (II.)

When we handle some long line calls, often causes the interface to stop responding or the IIS thread takes up too many issues, this time we need more asynchronous programming to fix these problems, but usually it is easier said than done, it is true that asynchronous programming is a completely different programming idea than synchronous programming. , for the developers accustomed to synchronous programmin

The event-based asynchronous Pattern is a more advanced asynchronous programming model than the IAsyncResult pattern, and is also used in more contexts. For relatively simple applications that can be conveniently implemented directly with the new BackgroundWorker component of. Net 2.0, For more complex asynchronous applications, you need to implement a class that

This article mainly introduces the related knowledge of delegate, event and asynchronous in C #. Has a good reference value. Let's take a look at the little series. It has been almost a year since I first approached C # programming. In the course of learning, there are many places that are always specious, until recently to understand. This article will first in

A few days ago in the Bo asked to see a C # Socket problem, think of the author 2004 do a provincial traffic flow receiving server project, the basic request is as follows: Receive automatic observation equipment traffic packets reported through the wireless network card, Internet and socket the automatic observation equipment that runs all year round 365*24 report the observation data 5 minutes, each record approximately 2K size There will be 100 or

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 is somewhat different, because in our project

callback function is specified when the BeginInvoke is executedDelegate{if (_m2 _m3)//through the flag bit to determine whether 2 3 has been completed{Lock (obj){_M3 = false;if (_m2)StartProcess (); Perform 4}}}This function is called after the Step2 and Step3 threads have finished executing. Here, again, I used the flag to determine if Step2 and step3 have been completed, and to prevent a special situation: "The time that Step2 and step3 execute are almost equal, they will be judged by if (_M

thread.Reference: http://blog.csdn.net/stxyc/article/details/16945581Beginner C #, understanding is not very thorough, step by step, gradually.Here is a small program for the progress bar:UsingSystem;UsingSystem.Collections.Generic;UsingSystem.ComponentModel;UsingSystem.Data;UsingSystem.Drawing;UsingSystem.Linq;UsingSystem.Text;UsingSystem.Windows.Forms;Namespaceprogressbar{PublicPartialClassForm1:form {DelegatevoidShowProgressDelegate ();Delegatevoi

Handlestheclientrequest.socketlistener = (Socket) ar. asyncstate;//endtheoperationand displaythereceiveddataontheconsole. byte[]Buffer;intbytesTransferred; try{ sockethandler=listener. Endaccept (Outbuffer,outbytestransferred,ar); }Nbsp;catch (Exception 1e) {... return; }catch (Exception 2e) { ... return;} Delivery received again, the implementation has been receiving socket operation listener. BeginAccept (Null,receiveddatasize,newasynccallback (acceptreceivedatacallback), listener ); }The pro

); Webclient.downloadstringasync (NewUri (URL)); } Private Static voidclient_DownloadStringCompleted (Objectsender, DownloadStringCompletedEventArgs e) { //Console.WriteLine (e.cancelled);Console.WriteLine (E.error! =NULL?"WebClient an asynchronous get error occurred! ": E.result); } #endregion #regionWebClient's OpenReadAsync test Public Static voidTestgetwebresponseasync (stringURL) { varWebClient =NewWebClient (); Webclient.openr

View Original Each delegate has three methods: invoke, begininvoke, and endinvoke. The first method is to delegate synchronous calls to a specified function, and the other two are asynchronous calls. The begininvoke method is returned immediately after the call and does not wait for the call result. The endinvoke method is used to retrieve the call results. After begininvoke is called, you can call the endinvoke method at any time. If the

C # multi-thread, asynchronous, lock, comprehensive resolution (1): first, say hello to the thread, Welcome to the world of multithreading. Here we have a boss called CPU. That's right, CPU manages all the threads. Every thread is waiting to be flattered by the CPU in the harem. It should be the most valuable time in a thread's life. Well, before learning multithreading, it is necessary to master the use a

Hredis provides asynchronous interfaces, and can be used in conjunction with Libevent, Libev and other message frameworks; Sample code (combined with libevent use, libevent Reference): Test_asyn.c #include Makefile ALL:TEST_ASYN.C gcc-o Test_asyn test_asyn.c-i/mydir/local/include -i/mydir/include-l/mydir/local/lib- Lhiredis -l/mydir/lib-levent Implementation results (need to add/mydir/local/lib and/mydir/lib to Ld_library_path): $/test_asyn

indicates that "the type of the variable is determined at runtime ". Therefore, dynamic and VAR have different meanings. VaR allows you to enter less words when initializing a variable. The compiler will deduce the type of the Variable Based on the right value. Dynamic is even more powerful. It tells the compiler that it doesn't matter what type it is, and it is no longer necessary to deduce it during runtime. VaR can only be used for the definition of local variables. You cannot define the

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 them, and I will give them some valuable insig

C # asynchronous Socket (BeginXXXX) server code, Preface: 1. A recent maintenance company's old project is Socket communication, which is mainly used to receive captured images sent by IPC (client). During this period, communication should be maintained, data packets should be monitored and processed. However, I personally think the code I wrote was not very suitable for myself, so I wrote it again. However

This article mainly describes the C # WinForm implementation of multi-threaded asynchronous update UI (progress and status information), 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. Introduction In the WinForm program development needs to carry out a large number of data read and write operations, often will

C # asynchronous tool class and a little refactoring experience, The first article of the new year in 2015, wishing you a little late, but your sincerity is still at: Happy New Year. Today I want to share an asynchronous tool class. In the C/S architecture, I first perform asynchro