C#

C # Data types In C #, variables are divided into the following types: Value type (types) Reference type (Reference types) Pointer type (Pointer types) Value type (types) Value type variables can be assigned directly to a value. They are derived

null and void A null value is used to indicate that the data type is not assigned any value, that it is a reference type, that void means no type, or that there is no value. The difference between null and void can be that void is not at all, and

C # By default, if the value of a constant expression exceeds the maximum value of the target type, a compilation error will result. If the target data type cannot hold data from a very few expressions, the data is truncated when it is

1. Set up list for storing multiple statements ///save Form//////protected void Save () { list list = new list (); List. ADD (String. Format ("INSERT into Picsone (model,idser,idflg,lmuser,lmdate,lmtime) VALUES (' {0} ', ' {1} ', ' {2} ', ' {3} ', {

Introduced In the previous C # implementation of the thread pool function (a), we basically implemented a program that can run, and not really called the thread pool. Because the code in the previous article has a fatal bug that is that there is no

Technical background of thread pool In object-oriented programming, creating and destroying objects is time-consuming, because creating an object to acquire memory resources or other resources means that one way to improve the efficiency of the

The stack represents a last-in-first-out collection of objects. Using system;using System.Collections; Namespace collectionsapplication{class Program {static void Main (string[] args) {Stack s t = new Stack (); St. Push ('

Dynamic link library is a way to realize the concept of shared function library. The extension is ". dll". The dynamic link library provides a way for a process to invoke a function that is not part of its executable code. The executable code for a

Using system;using system.collections.generic;using system.linq;using system.text; Namespace consoleapplication1{class Program {static void Main (string[] args) {Genericarr ay intarray = new genericarray (5);//Instantiate an array of

#region Remove the specified character at the end of the string///// Remove the specified character at the end of the string// /// String to be removed /// specified character/// removed string public static

#region The byte stream that returns the picture byte[]//////byte[]/////////// public s Tatic byte[] Getimagebyte (string imagePath, WebClient WebClient) {byte[] imgbyte = null; try {//messagebox.show ("getimagebyte");

C # Encapsulation Encapsulation is defined as "enclosing one or more items in a physical or logical package". In the object-oriented programming methodology, encapsulation is designed to prevent access to the implementation details. Abstraction and

Use Expression to filter any data field (1). expression Field Data Tables are often used in projects. Currently, BS usually uses the front-end to use a js Grid control, load data from the background through ajax, and then bind the data to the Grid.

C # compare the differences between the two arrays, String [] arrRate = dtRate. asEnumerable (). select (d => d. field ("arry ")). toArray (); // Astring [] arrTemp = dtTemp. asEnumerable (). select (d => d. field ("arry ")). toArray (); //

[Note] note that BinaryWriter writes a string to a small pitfall. The length prefix "length-prefixed" and "cbinarywriter" will be added before the string. Previously, I thought that BinaryWriter would write the string to the binary string strictly

07 menu and exercises with small icons in the lower right corner, and 07 menu icons Private void exit ToolStripMenuItem_Click (object sender, EventArgs e) // exit menu method {// this. close (); Application. exit (); // we recommend that you use

C # thread pool for multithreading article 2, In the previous article C # thread pool of multithreading Article 1, we mainly learned how to call the delegate in the thread pool and how to execute asynchronous operations in the thread pool. In this

For C # as type conversion and Assembly. LoadFrom tracking !,Background: Not long ago, I released a debugging tool: A visual debugging tool that is essential for. NET developers) The effect is as follows: Later, a small number of users reported

C # thread synchronization with multiple threads 3, In the previous C # thread synchronization 2, we mainly learned the AutoResetEvent construction, ManualResetEventSlim construction, and CountdownEvent construction. In this article, we will learn

WriteLog, writelog Function Public class WriteLog{/// /// Create a log file/// /// exception class Public static void CreateLog (Exception ex){String path = Application. StartupPath + "\ log ";If (! Directory. Exists (path )){// Create a log