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 /

Window operating system, everywhere is the formAdvantages: Simple, powerful, convenient and flexibleStep: Create a new Project project type Visual C # project Template window applicationSeparate the code for the same form into two files with partial:

Remove unnecessary spaces in the string and retain one (C #), In the C # string, there are many spaces. It is required to remove unnecessary spaces and retain one. The principle is to use the Split () method for segmentation. One option is

Audio Source components and related APIs, sourceapi Audio Source:Sound components. It must be used with the Audio Listener. The Main Camera will have the Audio Lisetener by default. Audio Clip:Sound fragment. Specifies the audio file to be

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)

Constructor and object initializer Constructor:Used to instantiate an object. Generally, a default no-argument constructor exists in the class or struct. If we manually write a constructor with parameters in the class, the constructor without

Data type conversion (packing and unpacking) and constants, Data Type Packing Constants Implicit conversion [automatic type conversion]:The two types must be compatible. The original value range must be smaller than the target value range, which can

Passing parameter to an event handler [stackoverflow], Q: I want to pass myListAs parameter using my event public event EventHandler _newFileEventHandler; List _filesList = new List();public void startListener(string directoryPath){

C # (string method summary ), 1. character array and String Conversion (1) ToCharArray () converts a string into a character array String s = 'blog I like '; Char [] chs = s. ToCharArray (); (2) obtain the string from the character array new string (

View ftp Server PDF files online, ftp Server PDF files   URL format: // Http: // localhost: 2692/javasviewer/web/viewer.html? File = http: // localhost: 2692/TOV/DASystem/GetStreaem? Path % 3 Dftp: // ftp account: ftp password @ IP Address/0001/E_

C # Read txt files in fixed text format, C # Read txt files in fixed text format   A simple C # program for reading txt documents, which stores instance data in a fixed format. // Determine whether the keyword has var isTr = File in the

C # create, deploy, and call WebService,       Webservice can be used for interaction between distributed applications and between different programs. There are not many conceptual things. The following is an example of creating a simple webservice.

Abclearning entry series (5) (display to add, delete, modify, and query) The general effect is as follows: 1. Add Controller (the X. PagedList used is noted that nuget is added) Using System. web. mvc; using Abp. application. services. dto; using

Bad taste of code [2] Total returned directory 4. Long Parameter List (too Long Parameter column) Too long parameter columns are hard to understand. Too many parameters may cause inconsistency and are not easy to use. 1. Generally, if there are

In C #, struct is defined and converted into byte arrays, Recently, the structure and byte array conversion were used in socket communication packet parsing. Because the client adopts C ++ development, the server adopts C # development, therefore,

C # large List memory allocation,  Previously, when I used the List only in development, I used it almost just by taking it over. I never considered the List memory allocation problem, imagine how the memory of a 0.1 million yuan List changes when

C # obtain the system time and time format conversion, -- DateTime numeric typeSystem. DateTime currentTime = new System. DateTime ();Returns the current year, month, day, hour, minute, second, currentTime = System. DateTime. Now;Int Year =

C # Response download, // Download TransmitFile      protected  void  Button1_Click( object  sender, EventArgs e)       {           /*           Microsoft provides a new TransmitFile method for the Response object to solve the problem of using

C # string fuzzy match recursion, Using split and Recursion Private int search (string strValue, char [] searchchar, int index) {var temp = strValue. split (searchchar [index]); var countt = temp. count (); if (countt> 1) {++ index; if (temp [0].

. Net-C # asynchronous program knowledge point sorting, Thread:Each Windows process has a Main Thread used to enter the entry point of the program, for example. the Main () method is used as the entry point of the program. When you call this