C#

[Csharp] /// /// Add a row number to the DataGridView /// /// DataGridView Control ID public static void AddRowIndex (this DataGridView dgv) {dgv. rowPostPaint + = delegate (object sender, DataGridViewRowPostPaintEventArgs e) {SolidBrush B = new

Async and await are introduced in C #5.0. These two keywords allow you to write asynchronous code in synchronous mode more conveniently. That is to say, more convenient asynchronous programming. The general format is as follows: var result = await

A structure is a data type defined by a programmer and is very similar to a class. Has data members and function members. But there are also differences: 1) the class is the reference type, while the structure is the value type; 2) the structure is

1. add reference System. directoryServices2.using System. directoryServices; [csharp] private static DirectoryEntry GetDirectoryObject () {DirectoryEntry entry = null; try {entry = new DirectoryEntry ("LDAP: // 192.168.10.5: 389/DC = ecera, DC = com,

Using System; using System. IO; class ListAllFilesDemo {public static void Main () {Console. write ("Enter the directory to be queried:"); string dir = Console. readLine (); try {ListFiles (new DirectoryInfo (dir);} catch (IOException e) {Console.

During SSH project development, most of the functions of Struts are implemented through the interceptor. In terms of programming, interceptor is also the implementation of AOP. Here, we use the C # code to simulate a simple interceptor. First, let's

Suppose there are server programs, ChatServer and client programs ChatClient. the client can send messages to the server. step 1. start listen on the server, 2. then the client connect.3. the client sends the message as long as the server starts

After you rename the Startup File *. exe, the application system will open normally. However, once the Crystal Report page is displayed, the system will report an error and die. It took a long time to find the cause. Failed to Load file or

This document cannot be reproduced or referenced without the permission of the author. to reference this document, contact the author by email. Contact the email address xuanzhaopeng # gmail.com.   During the development of windows desktop

1. Understanding Abstract Factory design patterns the book says: it provides an interface for creating a series of related or mutually dependent objects without having to define their specific classes. 2. view the class chartCOMMENTATOR: The picture

A good program has a public standard called high cohesion and low coupling. However, this is a matter of degree. The high cohesion cannot avoid communication and communication, and it is abstracted blindly, inheritance is unscientific. We should

Some of the knowledge points used in this recent program are hereby recorded for future use! 1. Method for Testing the code execution time [csharp] Stopwatch sw = new Stopwatch (); sw. start (); // enter the code sw to be executed here. stop ();

Start an external program: [html] using System; using System. collections. generic; using System. linq; using System. text;/* create a process and input the required parameters * or start an external program for the process, and pass in the

It is useful to check whether the current program has been operated. The simplest way is to determine whether the mouse position has changed. The same is true in winform. Code: [csharp] public class CheckUsedManager {public static event EventHandler

In ASP. NET, we often use the GridView. When performing some operations, such as deleting the selected items, we will add check boxes. If we want to delete them in batches, what should I do? First, we need to add a hidden field on the page to store

Sometimes it is often used to store an anonymous object into a session or List or another container, but it becomes an object when it is obtained, which is not convenient to use. The following is a conversion method: [csharp] class Program {static

[Csharp]AddThe following code: string thisConnectin = "server = XIAOLI-PC \ XIAOLI; Integrated Security = true; database = map "; SqlConnection con;Con = new SqlConnection (thisConnectin );If (this. CheckInfo ()){ String cmd = "insert into tb_user

[Csharp]# Region/// /// Start item/// /// Start or not /// name of the startup value /// Application. ExecutablePath Public static void RunWhenStart (bool Started, string name, string path){Microsoft. Win32.RegistryKey HKLM = Microsoft.

C #5.0 brings us three very useful compiler features CallerMemberName CallerFilePath CallerLineNumber In C and C ++, the following characters help us to debug the message's file line number. 01. # define debug_msg printf ("% s [% d]:" ,__ FILE __,__

In recent work, it is necessary to determine whether the image is black or white. Because it is processed in large batches with more than 100,000 images, it is automatically determined by the program.   Image Object: processed jpg format Bitmap