C#

1. First, let's take a look at the definition of the IEnumerable interface:Namespace System. Collections{// Summary:// Exposes the enumerator, which supports a simple iteration over a non-generic// Collection.[ComVisible (true)][Guid ("496B0ABE-CDEE-

About the mechanism of string resident, those who know it will surely think it is very simple, but I believe a lot of people will be confused about it. An interesting Sample is provided before you begin to deploy the string:Code Snip:Static void

Static Modifier   Declares that a class member belongs to a class rather than an instance of the class.  StaticModifier indicates that the member belongs to the instance of the class rather than the class. Even if multiple instances of the class

I. Interface The interface is a common tool in C #. I will not talk about the concept or anything. Here are some notes: 1. The interface can only contain declarations of functions, attributes, and events: Code highlighting produced by Actipro

Polymorphism is one of the three mechanisms of object-oriented programming. Its principle is based on the rule that sub-classes inherited from the parent class can be converted to the parent class. In other words, where the parent class can be used,

1. Regular ExpressionA. Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Using System; Using System. Text. RegularExpressions; Public bool IsNumber (String strNumber) { Regex objNotNumberPattern =

Boxing and unboxing are new concepts proposed by. NET!All types of. NET are inherited by the base class System. Object, including the most common basic types: int, byte, short, bool, etc., that is, all objects are objects. If you declare that these

Combine and arrange the element child sets in the List using recursion. The Code is as follows:Using System; using System. collections. generic; using System. linq; using System. text; using System. collections; namespace ConsoleApplication2 {class

The following is what I used in my previous project. At that time, I used custom features to include configurable features when exporting an excel report. The specific excel operation is not the focus of this article, and this article will not

If you need to enter a lot of content in your program, such as various types of documents, it will be a cool feature to automatically switch the Input Method to the appropriate State when entering each input box, compared with the dazzling interface,

The implementation code is as follows: Using System;Using System. Collections. Generic;Using System. Text;Using System. Windows. Forms;// Introduce the office excel namespaceUsing Excel = Microsoft. Office. Interop. Excel;Using System.

The cache is mainly used to speed up Data Reading. Because there is a traffic bottleneck between the server and the application client, when reading large data volumes, cache is used to serve the client directly, which can reduce the data

1 private Boolean dbUpdate ()2 {3 string strSql = "select ProductsSpecID, ProductsSpec, ProductsSpecUnit, ProductsID from tbl_product_detail_master ";4 System. Data. DataTable dtUpdate = new System. Data. DataTable ();5 dtUpdate = this. dbconn

/// /// Method for obtaining proportional scaling Images/// /// image path to be scaled /// resize the image storage path /// resize the image storage format /// width or height to be kept /// if it is true, the width is scaling; otherwise, the

A few days ago, when I write a value that is automatically read from XML and injected into object attributes, I do not want to write the original data of the int type or the string type for convenience, but when read from XML, it is of the string

In winform:// Storage Private void MemoryImage (){StringSQL= "";// String conn = "Provider = SQLNCLI; DaTa Source = 192.168.0.9, 1433; Database = WebDown; UID = sa; PWD = 111122 ;"; Stream MS;Byte [] picbyte;OpenFileDialog fdSelectPic = new

This. Page. Title = "artist search-Gallery ";//KeywordHtmlMeta keywords = new HtmlMeta ();Keywords. Name = "keywords ";Keywords. Content = "Gallery network, artist, Chinese painting, art, art, oil painting, calligraphy, contemporary art, sculpture,

// Obtain the CPU serial numberPrivate string GetCpuID (){Try{// Obtain the CPU serial number codeString cpuInfo = ""; // cpu serial numberManagementClass mc = new ManagementClass ("Win32_Processor ");ManagementObjectCollection moc = mc.

Sometimes you need to run other programs in the program and obtain output results for further processing .. NET Framework has provided corresponding classes and methods, and we can easily achieve our goal. The following example is used previously.

1. Create a C # project Create an EXE project in WinForm or command line format. Add references to System. ServiceProcess. dll and System. Configuration. Install. dll.  2. Create a service class Add a class that inherits the System. ServiceProcess.