C#

I used to define a delegate to write the Commission, but recently read some foreigners write the source code is to write with action and Func, at that time feel very strange to see the Origin code also feel unfamiliar, so I took the time to learn

In the Java EE Web Development, there are filter filters, the filter can intercept the specified URL access, and execute the filter method, according to the actual application, modify the request code in the filter, judge the session information,

Before we learned the simple data type in C #----value type, followed by another data type in C #----reference type, the term "reference" here means that a variable of that type does not directly store the value it contains, but instead points to

This paper introduces the infrastructure of parallel programming in multi-threaded environment. Mainly include: Volatile __thread Memory Barrier __sync_synchronize Volatile The compiler sometimes optimizes the performance by

One, the T in the List object is the case of the value type (int type, etc.) A list of value types can be copied directly using the following methods: list oldlist = new list (); Oldlist.add (..); list NewList = new list (oldlist); Second, the T

First, be sure: Microsoft's Framework Class Library (FCL) ensures that all static methods are thread-safe. The FCL does not guarantee that the instance method is thread safe. Because if all add locks, it will cause a huge loss of performance. In

C # Implementation code that imports Excel data into a database If the data in Excel is as follows: The database is built as follows: Where ID is the self-increment field: Code: Using system;using system.collections.generic;using

Implementation of spiral motion based on spiral queue logic The inverse method of the helical queue algorithm, which controls the motion of the two-axis motor according to the helical trajectory, as. 1. Spiral Queue Algorithm Analysis is the spiral

C # Quick way to determine whether two pictures are consistent #region to determine if the picture is consistent///////// Picture one Picture two // consistent public bool Issameimg (Bitmap img , Bitmap BMP) {//Size consistent if (IMG). Width = =

An HTML page has a lot of elements such as ,. These elements form an HTML page. In Web development, permission control is used for every system. The permissions for each element of the interface also need to be controlled. such as a query user

Boxing and unpacking are the actions that are performed to convert between value types and reference types. 1. Boxing occurs when a value type is converted to a reference type 2. Unpacking occurs when a reference type is converted to a value

First, establish a data table Ipstat for storing user information The user information I store in the Ipstat table only includes the logged-on user's IP (ip_address), IP source (IP_SRC) and logon time (Ip_datetime), the information of the tables I

shared_ptr Basic Usage SHARED_PTR uses reference counting to manage the objects that are pointed to. When a new shared_ptr points to the same object (copy shared_ptr, etc.), the reference count is added to 1. The reference count is reduced by 1

First, let's start with a few APIs. _getcwd Gets the current working directory. Char *_getcwd ( char *buffer, int maxlen ); Buffer Storage location for the path. MaxLen Maximum length of the path in Characters:char for _GETCWD and

About writing a program that can fill a hard drive Let's think about the idea: First step: Get the logical drive letter Step Two: Create a file Step three: File write data Extension requirements: One: Hide window Two: File set as hidden

Thread is also crazy ----- asynchronous programming, thread ----- asynchronousPreface This section describes basic knowledge about tasks, Async, and Await in asynchronous programming.What is asynchronous? Asynchronous processing does not block the

Design Mode stenographer, design mode classification stenographer Creation ModeThe static Factory Pattern method returns an instance.Returns an instance through the Abstract Factory Pattern interface.Builder Pattern returns multiple instances each

Use C # To send custom html emails, To send an HTML-formatted email, set the IsBodyHtml attribute of the MailMessage object to true.The MailMessage class is in the namespace System. Net. Mail.Using System. Net. Mail;Emails in HTML format have been

Part 11 to 20 Basic in C # continue, Reference

C # inverse matrix,The inverse matrix is obtained using the transformation of the unit matrix determinant. The source code is shown as follows: Public static double [,] Inverse (double [,] Array) {int m = 0; int n = 0; m = Array. getLength (0); n =