C#

1: Install the Epplus nuget packageImplementing the Source code:1 usingOfficeopenxml;2 usingSystem;3 usingSystem.Collections.Generic;4 usingSystem.IO;5 usingSystem.Linq;6 7 namespaceBigBeer.Core.Excel8 {9 Public classExcelTen { One /

Rational use of thread pool ThreadPool. QueueUserWorkItem (), 1 // ==> self-built Thread 2 new Thread () => 3 {4 // Thread Task 5 Console. writeLine (Thread. currentThread. managedThreadId); 6 }). start (); 7 8 9 // ==> thread pool management

Review C # Methods Math. Max and Math. Min, Learn Math. Max and Min today. For both methods, two parameters are required. The maximum and minimum values of the two parameters are returned.  Class Ac {public void LeanMathFunction () {int min = Math.

Secondary Development of CAD and Secondary Development of cad The Secondary Development of CAD can be implemented by writing extended DLL. The DLL function can be called by CAD. However, you must use the netload command to load the dll to CAD before

C # Winform automatically updates program instances, Step 1: Check for updates Checking for updates is nothing more than comparing the version of the update package and the local software version. If the update is high, the update is not updated.

Reconstruction Method-Simplified function call [5], reconstruction method-Simplified Function Total returned directory Directory of this section Hide Method (hidden function) Replace Constructor with Factory Method (Replace constructors with

C # dynamic concatenation of GroupBy, Public class Person {public string FirstName {set; get;} public string LastName {set; get;} public Person () {} public Person (string firstName, string lastName) {FirstName = firstName; LastName = lastName

A deep understanding of blocking queues and a deep understanding of queues BlockingQueue is a queue that supports two additional operations. The two additional operations are as follows: when the queue is empty, the thread that obtains the element

C # common error Solutions,1. Can I provide the Visual Studio development kit? Solution: Visual Studio 2017 development environment: Https://www.visualstudio.com/zh-hans/downloads/   Visual Studio 2015 and earlier development

The role of INotifyPropertyChanged, I recently learned about the data-driven UI, learned how to use the INotifyPropertyChanged interface, read many online articles, and I made a summary myself. INotifyPropertyChanged is actually very simple. There

Simple queue application and simple queue Application Using Newtonsoft. json; using System. collections. concurrent; using System. diagnostics; using System. IO; using System. threading; using System. web; namespace TestQuenu {// // simple file

C # Start the SQL Server service, 1 // Add System first. serviceProcess. dll Reference 2 ServiceController SC = new ServiceController ("MSSQLSERVER"); 3 4 // determine whether the service has been disabled 5 if (SC. status = ServiceControllerStatus.

Install, start, and uninstall Windows Service. Win + R Enter cmd and run cmd as the administrator; Installation: Cd C: \ Windows \ Microsoft. NET \ Framework \ v4.0.30319(installutil.exe, the version number of InstallUtil.exe must be the same as

Reconstruction Method-Simplified conditional expression [4], reconstruction expression Total returned directory7 Introduce Null Object (introducing Null Object) Summary You need to check whether an object is null again and again. Replace null with a

AutoResetEvent and ManualResetEvent, autoresetevent Original http://www.360doc.com/content/13/0829/14/4513754_310723961.shtml I. Role AutoResetEvenT andManualResetEventIt can be used to control the thread pause or continue. There are three important

Reconstruction Method-Simplified conditional expression [3], reconstruction expression Total returned directory Directory of this section Replace Nested Conditional with Guard clores (Replace Nested Conditional expressions with Guard statements)

Reconstruction Method-Simplified conditional expression [2], reconstruction expression Total returned directory Directory of this section Merge lidate Duplicate Conditional Fragments (merge Duplicate condition Fragments) Remove Control Flag) 3.

C # intermediate-read the Windows Service Program Execution path through the registry, I. Preface Assume that our C # solution contains multiple program applications, such as Web applications, console programs, WPF program applications, and Windows

Differences in interface-oriented, object-oriented, and object-oriented 1. Interface-oriented: Some methods and attributes of objects are constrained by interfaces, which are part of object-oriented objects. The better way is to

C # image brightness adjustment and pseudo-Color Image Processing, The left is the effect, the right is the principle, the right X axis represents the gray level of an image pixel, and the Y axis represents the pseudo-color of RGB three colors. The