Difference between const and readonly in C #

C # introduces the readonly modifier to represent the read-only domain, and const to represent constant. As the name implies, the read-only domain cannot be written, and constant cannot be modified. What is the difference between the two? A

C # Easy conversion between binary, octal, decimal, and hexadecimal...

In. NET Framework, the System. Convert class provides comprehensive conversion functions between various types and values. Two of these methods can be used to easily convert various hexadecimal values: Convert. ToInt32 (string value, int fromBase ):

C # To move text from left to right in the form

Procedure: (1) create a project named 27_01 and set the Text attribute of the default form to "scroll Text ". (2) Add a Label control and a Timer control on the form, and set the Interval attribute of the Timer control to 200. (3) The program

Use C # programming to communicate with Siemens PLC through OPC-synchronous communication

1. OPC service IntroductionThe latest Software provided by Siemens: Simatic Net PC-Software CD 2005 provides a unified platform for the development of various configuration Software. Its PC station is not only used for some configuration Software,

C # Replace the content in the Word text box (do not use Bookmark)

For more information, see StoryRanges, NextStoryRange, WdStoryType, and Range. Replace text in Word textbox objects using VSTO and C # 01 /// 02 /// Search for and replace the text 03 /// 04 /// 05 /// 06 /// 07 public void

C # hexadecimal conversion

// Convert decimal to binary Console. WriteLine (Convert. ToString (69, 2 )); // Convert decimal to octal Console. WriteLine (Convert. ToString (69, 8 )); // Convert decimal to hexadecimal Console. WriteLine (Convert. ToString (69, 16 )); // Convert

Out and Ref parameters in C #

OutAndRefParameters are often used to get values by passing parameters through methods. When your method does not have more than one return value, these two parameters play a role. Ref is the address for passing parameters, and out is the return

Recursive Implementation of Infinitely hierarchical Repeater: Read the database once and use LINQ2SQL technology to support sorting & amp; hide

Preview:   Database Structure: Id (int) classname (string) parentid (int) sort (int for display and sorting) 1 home 0 1 2 appliances 0 2 3 sofa 1 1 4... 3 1 ... 10... Red 4 1   Note: Parentid parent node ID Sort is used to hide, display, and sort

C # How to exit the application (to be tested)

This. close (); // method to close the current window.Application. Exit (); // method to Exit the entire Application. (Unable to exit the independently enabled thread) Application. ExitThread (); // release all threads Environment. Exit (0) // you

C # package the folder in zip format (including all files in folders and subfolders)

I didn't like to play with a blog. I also registered this blog in the blog Park this time.But there is no content, so I want to add anything. Most of the gadgets recently developed by Microsoft are related to file operations/I/O. Therefore, I am

C # cpu usage Detection

Using System;Using System. Collections. Generic;Using System. Linq;Using System. Text;// Reference 2 namespaceUsing System. Diagnostics;Using System. Threading;Namespace ConsoleApplication1{Class Program{Static void Main (string [] args){Process []

C # File Processing Mechanism Overview

1. What is a stream? : A stream is used to transmit data between a carrier and a carrier. [The carrier is the carrier of data. For example, if the data is stored on the hard disk, the hard disk is the carrier, and the U disk is the carrier, and so

C # basic knowledge Indexer

Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Class SampleCollection {Private T [] arr = new T [100];Public T this [int I]{Get{Return arr [I];}Set{Arr [I] = value;}}}// This class shows how

C # tips for simulating Post and Get Data Transmission

When reading webpage information through an application, you usually need to capture webpage data. However, there is a problem that many webpages need to log on before obtaining page data. Therefore, you need to save the current cookie, in. NET, you

C #. NET lock screen program (with blocking Task Manager)

Step 1: Set FormBorderStyle to none and WindowState to Maximized. Occupies the entire screen. Step 2: use hooks to monitor global Keyboard Events. This shields most system hotkeys. However, blocking ctrl + alt + del Task Manager is complicated. This

C # efficient programming topic set 1

Recently, I have discussed a number of topics in group C #'s fast-growing team. I would like to share my summary with you.Of course, the focus of the so-called topic is to discuss whether it is the best practice or not. If there are any mistakes in

C # implement Abstract Factory with reflection

Abstract Factory, one of the well-known design patterns, I just made an example to record it, first class diagram Code NamespaceAbstractFactoryTest{ ClassProgram{ Static VoidMain (String[] Args){ //The specific factory type

Suggestions for improving C # program 4: Implementation of the standard Dispose mode in C #

You need to clarify the resources in the C # Program (or. NET. Simply put, every type in C # represents a resource, and resources are divided into two categories: Managed resources: Resources allocated and released by CLR management, that is, new

C # example (2)-use delegate to pass values

Using System;Using System. Collections. Generic;Using System. Text;Namespace DelegateTest2{Public delegate void tranDelegate (string test );Class Program{// Value transfer between classes, which can be used to return a value to the parent form by a

Pattern-engineering implementation and expansion Visitor pattern Visitor-self-test reference answer

Below we will further complicate the HR system example in the text of this chapter: 1. The personnel types of system management include three categories and four sub-categories: A. Employees: including General employees and managers) B. Temporary

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