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
). ToLower (); string filepath = "/images/"; if (Directory.Exists (Server.MapPath (filepath)) = = false)//if it does not exist, create the file folder {DIRECTORY.CR Eatedirectory (Server.MapPath (filepath)); } String hash = Createpasswordhash (pic_upload. FiLename, 4); String Virpath = filepath + hash + fileextension;//This is the virtual path that is stored on the server string MapPath = Server.MapPath (Virpath); /Convert to physical path Pic_upload
Use iframe and js in C # To Implement Asynchronous Image Upload
Place the page for uploading images in iframe, use iframe to jump to another page, and submit the images to the server on this page without refreshing the homepage, after the submission is successful, use a script (callback function) to display the uploaded image on the home page.
Image selection page Add. aspx
Image Upload processing p
. NET (C #) Call webService to obtain the region of the Client IP address (non-asynchronous)Function Description: This interface is used to obtain the region (country, city, etc.) of the IP address accessed by the client ). Enter an IP address to query country, city, owner, and other information. If the country is not specified, enter the China parameter: IP address (automatically replaced ". "Is ". "), ret
The project has a large file transfer requirements, the user in the Web page to fill out a shared directory under a certain IP, the service side through the fill path to detect files in the shared directory for users to select the files to be transferred,After the user has checked the corresponding file and clicked Submit, the server began to carry out the file transfer. All the logical processes are in the same background code, the code that passes the file and the other business code are all i
What does asynchronous and synchronous mean? At the beginning, I was puzzled by some questions. Later I summarized the information and figured out how to share it with you:
Asynchronous:After a request is initiated, do other things first without waiting for the response of the request to be initiated to return any response. Of course, do you wait until the response is returned? The key is to check whether the result is actually returned. If the r
The Swoole-1.8.0 version has been released, and this version is a milestone version, with new features, multiple core feature optimizations, and bug fixes and invalid removal features. The update reads as follows:
Client
Add native asynchronous MySQL Client
Increased native asynchronous Redis client, based on the Hiredis library that is officially provided by Redis
Adding native
First of all, the main difference between synchronous and asynchronous operations. In a synchronous I/O operation, the method remains in the waiting state until the I/O operation completes. In asynchronous I/O operations, when I/O is started, the program's methods can be transferred to perform other operations, greatly increasing the efficiency of program execution.
Because Windows is a multitasking operat
The 1.system.threading.timer timer provides a way to repeatedly invoke an asynchronous thread. There are multiple timer classes in the. Net BCL. such as the System.Windows.Forms.Timer class for Windows applications, such as the System.Timers.Timer class that can run on a user interface thread or on a worker thread. They are very different, and the System.Threading.Timer class here is a class that calls an asynchro
1.Thread "Threads"Constant creation of Thread consumes large cups resulting in slower asynchronous efficiency2.delegate "Delegate Async"Because of the need to instantiate the delegate class continuously, it consumes CPU and memory3.Task "Combined with async"This is the lower Cup and memory loss in three of the best performanceHere is an example:#region delegate asynchronous and ASYCN
-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
When an event is triggered, the method for subscribing to the event is executed in the thread that triggers the event. That is to say, the method for subscribing to this event is synchronously executed in the thread that triggers the event. Therefore, there is a problem: if the method to subscribe to an event takes a long time to execute, the thread that triggers the event is blocked, and the method execution is completed for a long time. In this way, not only the execution of subsequent subscri
Callback C # And JS synchronous and asynchronous implementation,
The code is very simple and I will not explain it much. If you have any questions or suggestions, please leave a message and reply immediately.
C # code first
Class Program {static void Main (string [] args) {MyCallback mc = new MyCallback (); mc. callback (new Action (success), new Action (failed);
functions. (ii) Design performance
Project
Indicator description
Indicator values
Note
Supported Connection types
Depending on the type of support for QT
SSL and Plain
Both classes are supported at runtime.
Agreement
Ipv4 TCP, IPV6 TCP
Design the number of single-process connections
Computed under 4\8 transport thread configuration
1024\2048
Depends on the actual machine performance a
Data | Using C # Asynchronously to invoke the traditional 32-bit API for serial operation, the entire structure is particularly simple. Receiving data requires only defining data-receiving events.
Upload source code I will not, need the source code please contact me (dyj057@gmail.com). You can also teach me how to upload the source code.
Using System;
Using System.Runtime.InteropServices;
(C) 2003-2005
. 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-oriented API interface that is required in our pro
An easy way to create a thread is to define a delegate and invoke it asynchronously. A delegate is a type-safe reference to a method.Delegate also supports calling methods asynchronously. The delegate class in the background creates a thread that executes the task.To illustrate the asynchronous nature of a delegate, start with a method that takes a certain amount of time to execute. The Takesawhile method requires at least the number of milliseconds p
There are many ways to execute a function in another thread. Here we discuss the use of the BeginInvoke method of delegate. The advantage of this method is that the function is called in another thread, and there is no need to spend too much.
The following is an example of the asynchronous execution method using delegate:
Class Program{Static void Main (string [] args){Object syncObject = new object ();Test test = new Test ();Int index = 0;AutoResetEv
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, the server may regard these two requests as o
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