C # API: Generate and read Excel files

We want to provide users with some data. We think that Excel files are better for readability of users (persons rather than machines. Compared with csv, xml, and other files, Excel supports automatic filtering, window locking, background color,

Insert a namespace into the xml file

Yesterday, we needed to operate on the csproj file using code to implement switching between different vs versions. After XElement is used to read the csproj file, the desired object cannot be obtained. The content of the csproj file is as follows:

C # winform path selection and file read/write

// Read the private void readBtn_Click (object sender, EventArgs e) {try {if (pathTxt. text = "") {MessageBox. show ("Enter the file address"); return;} readTxt. text = File. readAllText (pathTxt. text, Encoding. default); // do not need to escape "\

C # software development instance. Customize your own screenshot capture tool (8) to add keyboard operation screenshots

Previous Article: C # software development instance. customized screen tool (7) add magnifiers Although a magnifier is added, it is not easy to locate the pixel level. It is still difficult to change the location of one or two pixels when you use

5. How to call the base class constructor in C #

// Base class using System; using System. collections. generic; using System. linq; using System. text; using System. threading. tasks; namespace MVATwentyQuestions {class Test {public string _ name = ""; public Test (string name) {_ name = name;}

C # Problems and Solutions for Recursive database query using Linq

The User table is usually used when we write the "XX management system" project. In some cases, the classification of personnel belongs to the tree structure, except for the highest and lowest layers, the middle layer has relative Parent and Child.

C # custom Attribute

Attribute Class is called a feature. It is a Modifier that can be freely defined by users and can be used to modify various objects to be modified. Class, interface, attribute, method, etc. unlike annotations, annotations are discarded by the

App. config

App. ConfigThe application configuration file is a standard XML file, and the XML tag and attribute are case sensitive. It can be changed as needed. developers can use the configuration file to change the settings without re-compiling the

C # log4net Output Error row number

An error is always reported when others call the interface I wrote, but this test is okay. I just want to use log4net to trace it. After tracking, it is found that there is indeed an error log on the interface, but there is no specific error. By

Multithreading series (4) security issues related to multithreading

When multithreading is used, there is usually a certain amount of public data. To prevent multiple threads from simultaneously operating the same data, we need to lock the thread. Locking Principle: Each referenced object has a Synchronous Index

Multi-thread series (2) thread pool ThreadPool

In the previous article, we summarized the most basic Thread knowledge point of multithreading and learned how to start a new asynchronous Thread to do something. But when we want to enable multithreading, if we still use the Thread, we need to

Obtains the location information of the Code.

To obtain the location information of the Code, the class System. Diagnostics. StackFrame is the key. The source code is as follows: 1 Using System; 2 Using System. Collections. Generic; 3 Using System.

C #-SqlServer connection

C # connecting to a database is not applicable to java in terms of classes. Different databases have different class libraries. Only the connection class of SqlServer is used here. Public class DbLink {private string config = ConfigurationManager.

[Unity3D tips] Use event/delegate in Unity to communicate with each other (2): Introduce NotificationCenter in the middle layer

Author: Wang Xuan Yi, source: http://www.cnblogs.com/neverdie/Reprinted, Please keep this statement. If you like this article, click [recommendation ]. Thank you! Using UnityEngine; using System. collections; using System. collections. generic; //

C # TCP Socket communication Basics

Socket communication is essential for network communication programs. Therefore, we need a set of established and simple communication procedures. As follows: public class PublicSocket {public const string DOWNLOAD_STATUS_WAIT = "1"; public const

06. Configure the email account for NopCommerce

If the NopCommerce configuration allows users to register as registered via email and activate the email address after registration, we need to configure the NopCommerce email account for sending emails. Of course, emails have many other purposes,

C # form freezing caused by a simple stopwatch

A stopwatch program is also a heart disease for me, because I always want to write such a thing, but I always want to go over the GUI, so it is quite awkward, it may be due to the issue of learning MFC at school, but when I want to write such a

C # development of the personnel management system (1)

Original article taken from personal website: JueYingCoder After learning C # basic syntax and windows form programming, we can design the course. Now we take the personnel management system as an example:Technical Implementation: C #4.0 + SQL

C # Thread Synchronization

1. In a single thread, we can only do one thing at a time. In multithreading, the most essential thing is that only one thing can be done at a time, but after the time slice specified by the CPU is completed, switch to another thread, and then after

C # examples of delegation and events

Today, I saw the use of delegation and events in a project, so I reorganized a simple and easy-to-understand example for reference only. Namespace DelegateAndEvent {public delegate void delegateTest (int a); // defines a delegate public delegate

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