c# multithreading

invoke the start () method of the Task class Sample code //using task factory TaskFactory tf = new TaskFactory(); Task t1 = tf.StartNew(TaskMethod); //using the task factory via a task Task t2 = Task.Factory.StartNew(TaskMethod); //using Task constructor Task t3 = new Task(TaskMethod); t3.Start(); Task t4 = new Task(TaskMethod, TaskCreationOptions.PreferFairness); t4.S

asynchronous thread is initiated, the newly initiated asynchronous thread does not affect the previously initiated thread, and all the originating threads continue to execute, as in the following example, until all threads of the user close the program end running. ）；The state can be null or a reference to the object to pass in each time the asynchronous thread is invoked;Callback is a method that passes a parameter of type object, the return value is a delegate type of void, and is customized

can be not an object type receive return parameter Task taskstring > Task = Task.factory.startnewstring > (() = downloadstring ( Http://www.linqpad.net string result = task. Result; // use The result, block the main thread until the task finished Call ThreadPool.QueueUserWorkItemWhen used. NET is 4.0 versions, we can only use ThreadPool.QueueUserWorkItem and asynchronous delegates two ways. Asynchronous delegate (asynchronous delegates)The difference from ThreadPool.Qu

C # MultithreadingOne, the reason for using threads1. You can use threads to isolate code from other code to improve application reliability.2. You can use threads to simplify coding.3. Threads can be used to implement concurrent execution.II. Basic Knowledge1, process and thread: The process acts as the basic unit of the Operating system execution program, owns the resources of the application, the process contains the threads, the resources of the p

. 2, if there are multiple threads accessing an object at the same time, but the data or methods they access are not the same (not cross), then this situation does not need to use thread synchronization. For example, in the example of the company where there are T and Q two people, but their salary is a and B in charge, then the processing of this wage does not need to synchronize the thread. 3. If an object is accessed by multiple other threads at the same time, it is generally only necessary t

scenario: This scheme is more violent and eliminates deadlocks. But if a thread needs a lot of resources, it's a waste of time. and is easy to appear, because some one or two resources required cannot be met without allocating resources. 4th, 5 scenarios: This scheme destroys the necessary conditions for the creation of deadlocks--request and hold condition. But it's not always possible to do so. 6th scenario: This is the deadlock detection, when the deadlock is de

Using System;Using System.Configuration;Using System.IO;Using System.Threading;Namespace Fqdservice.utils{Write Log classpublic class FileLogger{#region Fieldpublic static readonly Object _lock = new Object ();#endregion#region Write filesWrite a filepublic static void WriteFile (string log, String path){Thread thread = new Thread (new Parameterizedthreadstart (Delegate (object obj){Lock (_lock){if (! File.exists (PATH)){using (FileStream fs = new FileStream (path, FileMode.Create)) {}}using (Fi

Http://www.cnblogs.com/lvdongjie/p/5416883.html3. Method Three: Using lambda expressionsFor those unfamiliar with lambda expressions, you can view the documentation on Microsoft MSDN. You are assumed to be familiar here. Because most of the time we use delegates, we can usually use lambda expressions.View Codeusing System; using system.threading; namespace threadwithparameters {class program {static void Main (string[] args) {string Hello = "hello world"; //new thread (() = = Threadmainwithpa

Because of the need for multithreaded C + + crawler before the multithreading did not use mutex, and then there are some problems is, repeatedly downloaded the Web page ... I found this code on the Internet, so I wrote a blog to share it with the people I needed. The compilation environment vs2013+win8.1 or codeblocks +win8.1 The following code is codeblocks, the change can be put on the VS see comments Cod

In C # Software design, if there are multiple threads that frequently manipulate the same control of the UI main thread at the same time, such as display status, the error of "not setting an object reference to an instance of an object" is often encountered. Sometimes even if you use Try...catch ... To catch bugs is still useless, such as a recent small development application. 5 threads need to write the state to the RichTextBox control frequently, w

In many cases, you can [always] or [need] use multiple threads. This will bring a better user experience, so that you will not suddenly get stuck when you are operating a function. In the case of. net winform, you can consider using the [asynchronous/auxiliary thread] when the control operations are not involved and the data volume is large 〕. The asynchronous/multithreading method generally considers the creation of the delegate, and then BeginInvoke

processes and Threads:a process has at least one thread, and multiple threads in the same process can execute concurrently. The so-called concurrency just keep switching, but the computer switch too fast, people our brains feel is in parallel execution. A thread is an execution flow in a program, each with its own proprietary register (stack pointers, program counters, and so on), but the code area is shared, meaning that different threads can execute the same function.

3.1 Using ThreadStart delegatesHere is an example of the benefits of multithreading, first in the message class to establish a method ShowMessage (), which shows the current running thread ID, and use the Thread.Sleep (int) method to simulate part of the work. The ShowMessage () method of the Message object is bound by the ThreadStart delegate in Main (), and then the Async method is executed through Thread.Start (). 1 public class Message 2 {3 public

Today, most CPUs have multiple cores, in order to maximize the performance of multi-core processor, improve the concurrency of the server, to ensure that the system for multi-threaded support is very necessary. Our previous design is based on single-threaded, in this article we will improve the system to further improve the performance of the system while ensuring that the system for multi-threaded support.First of all, we have selected the reactor mode based on I/O multiplexing, so how do we ha

1 Why multithreading is usedTime-consuming operations use threads to improve application responsiveness (especially important for graphical interface programs, multithreading ensures that the interface is not stuck and can still respond to the mouse)Parallel operations use threads, such as servers, to respond to client requests.Multi-CPU or multi-core system, multithrea