C # string truncation method

/// /// String truncation method/// /// truncation character /// intercept Len when it is greater than len /// Public string Substr (string str, int len){If (! String. IsNullOrEmpty (str )){System. Text. RegularExpressions. Regex rChinese = new

. Net clr memory management (garbage collection)

1. What is Garbage? Each application has a set of root users. The root can be used to indicate the storage location. These locations point to objects in the managed heap or null objects, called the active root, and form an active root list. The JIT

4 basic skills of C #

1.If possible, use interfaces for programming The. NET Framework includes classes and interfaces. When writing a program, you may know which class of. NET is being used. However, in this case, if you program with an interface supported by. NET

Basics of LINQ to XML Programming

  1. LINQ to XML classThe System. Xml. Linq namespace contains 19 classes. The following table lists their names and descriptions: Class DescriptionXAttribute represents an XML property XCData represents a CDATA text node XComment represents an XML

C # Assembly Installation and uninstallation

The following code installs an assembly: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->/// /// Install and uninstall the Assembly/// /// assembly path /// whether to install (uninstall if False)

C # locking the keyboard and mouse

Using System;Using System. Collections. Generic;Using System. Linq;Using System. Text;Using System. Runtime. InteropServices;Using Microsoft. Win32;Using System. Diagnostics; Namespace WorkHelper{Class SysHook{[DllImport ("user32")]Public static

. Net/C # supports resumable multi-thread download

I recently learned how to use c # to implement multi-threaded download, and finally let me google some materials. The following is a copy of the Code:Namespace Microshaoft. Utils{Using System;Using System. IO;Using System. Net;Using System.

Skip List, C # implementation

Review the data structure, and implement the C # version Skip List.  Skip List Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Namespace Ln. SkipList { /// /// The values of list is ascend. ///

Detailed description of Request. UrlReferrer

Before use, make a judgment: If (Request! = Null & Request. UrlReferrer! = Null & Request. UrlReferrer. PathAndQuery! = Null){String previusurl = Request. UrlReferrer. PathAndQuery;}     Instance description: Request. UrlReferrer can obtain

C # Webservice generates proxy classes and calls them on the client

Generation: Start running CMD C: Program FilesMicrosoft Visual Studio 8SDKv2. 0Bin> wsdl/language: c #/n: XYS. MISS. Photo. PhotoAdmin/out: d: TempTestService. cs D: TempTestService. wsdl A TestService. cs file is generated under d:/Temp.  The

C # dynamically call the delegate DLL

Main Code of the called TestDll. dll file: Using System; Using System. Collections. Generic; Using System. Text; Namespace TestDll { Public class TestDll { Public string HandleStr (string str) { Return "[" + str + "]"; } } } Code for calling the

Use c # To draw images

More and more Web applications require charts for data display and analysis.For example, the voting result is displayed, and the company's production Statistical Chart is displayed and analyzed. Charts are used to display data, which is intuitive

C # observer Mode

The following code uses C # To implement the observer mode:// "Observer" InterfacePublic interface IObserver {Void Notify (object anObject );}// "Observed object" InterfacePublic interface IObservable {Void Register (IObserver anObserver );Void

C # Add a watermark to the image (transparency can be set)

/// /// Creating a Watermarked Photograph with GDI + for. NET /// /// physical path of the original image /// physical path of the watermark image /// watermark text (do not show the watermark text as a blank string) /// output

C # generate an unlimited menu

An unlimited menu is used in a recently developed project, so this code is pasted for research. The development environment is VS2008 + SQL 2000. First, the code for creating a database table is as follows:Database Table code of the infinite level

C # IEnumerable interface and IEnumerator Interface

1 public interface IEnumerable2 {3 // IEnumerable has only one method, and returns the number of enumerations that can access the set cyclically.4 IEnumerator GetEnumerator ();5}6 public interface IEnumerator7 {8 // Method9 // move to the next

C # implementation and application of a single-chain table

The implementation of the Single-linked table node class is as follows.Public class Node {Private T data; // data domainPrivate Node next; // reference the domain// ConstructorPublic Node (T val, Node p){Data = val;Next = p;}// ConstructorPublic

First, FirstOrDefault, Single, SingleOrDefault

Enumerable. First MethodReturns the first element in the sequence.Enumerable. FirstOrDefault MethodReturns the first element of the sequence. If the sequence does not contain any element, the default value is returned.Enumerable. Single

C # Remove digits from strings using regular expressions

/// /// Remove the number from the string/// /// /// Public static string RemoveNumber (string key){Return System. Text. RegularExpressions. Regex. Replace (key, @ "d ","");}   /// /// Remove non-numbers from the string/// /// /// Public

C # generate a bar code Image

On the Internet, I can see that some people write code on the bar code for a long time, and some even sell it. So I checked the information and hoped to help you.   My implementation principle is: In fact, Windows itself has a font used to

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