C#

1. Use FileStream to read and write files File Header:Using System;Using System. Collections. Generic;Using System. Text;Using System. IO;Core code for reading files:Byte [] byData = new byte [100];Char [] charData = new char [1000];Try{FileStream

Introduction:Recently, I made a big screen securities trading software with a B/S architecture for the customer, which is used to plot the trend of the securities index and the transaction volume, because the customer requires that the image be

String is a reference type, but it also has some value type features. String indicates whether to pass the value or reference. The string declaration of c # Is a String class. Of course, it is to pass the reference. However, most of these questions

  Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->// Use the Extension MethodPublic static string [] SplitExt (this string sourceString, string splitString){List arrayList = new List ();String s =

1. Classes and interfaces In C #, interfaces are responsible for defining functions. In projects, interfaces are used to define classes, while classes are specific functions of negative tables. A class can inherit a base class, that is, the parent

The three methods are as follows:String a = "";1. if (a = "")2. if (a = String. Empty)3. if (a. Length = 0) The three methods are equivalent,Which method has the highest performance? I will illustrate the problem with an experiment. Create three

Bitmap bmp = new Bitmap (100,100 );Graphics g = Graphics. FromImage (bmp );Font f = new Font ("arial", 11f );Brush B = Brushes. Blue;String txt = "Rotate text animation! ";SizeF sz = g. MeasureString (txt, f );G. Clear (Color. WhiteSmoke );G.

Summary: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->/// /// Create an XML document /// /// root node name /// attribute value of a root node /// /// Moss call method: If you want to save

It took two nights to finish reading New features in CSharp 4.0.docx. One of the biggest concerns is the great changes in the upstream of Dynamic Language Programming and COM's interoperability. The former will be C # With python and ruby language

It is very easy to make the MDI form in VB. This is not easy in C #, but it is very convenient. First, add a form in C #, name it MdiMain, and set IsMdiContainer to true, so that the MDI main form is created. Then add a new form named MdiChild. Run

Cause: Unknown EncodingSolution:StreamReader sr = new StreamReader (filename, System. Text. Encoding. Default)// Add the red part to indicate that the encoding method is the same as that of the system (Chinese), and filename indicates the file

/// /// Generate a thumbnail/// /// source image byte [] /// width of the generated thumbnail /// height of the generated thumbnail /// Private byte [] GenerateThumbImg (byte [] imgBuffer, int width, int height){MemoryStream imgStream =

Using System;Using System. ComponentModel;Using System. Text;Using System. Net;Using System. Net. Mail;Namespace Smtp{Public class SmtpMail{Private string toAddress = "";Private string mailUser = "";Private string userPassword = "";Private string

// Generate 0 ~ A random number of 100 (including 100)Int max = 100;Int rnd = int. MinValue;Decimal _ base = (decimal) long. MaxValue;Byte [] rndSeries = new byte [8];System. Security. Cryptography. RNGCryptoServiceProvider rng= New System. Security.

If the directory is available: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->DirectoryInfo TheFolder = new DirectoryInfo (PathName ); If (TheFolder. Exists) { //............. }   If the file is

C # proxy is actually similar to the function pointer in C ++. This article describes how to implement a C # proxy in three steps.   The C # proxy is actually similar to the function pointer in C ++. Because C # does not have a pointer, you

I recently learned about EDM and found that LinqPad is a good thing. It can run the Linq To SQL and Entity SQL Language scripts, but does not use the ESql query function. It always reports an error and cannot find the portal for half a day, in anger,

In addition to music information, an MP3 song also contains information such as the song name and singer. Next we will automatically read the song information through c # programming. Using System; Using System. Collections. Generic; Using System.

# Region ftp upload function /// /// Ftp upload function/// /// /// /// /// Public static void Upload (string ftpServerIP, string filename, string ftpUserID, string ftpPassword){FileInfo fileInf = new FileInfo (filename );String uri = "ftp: //" +

For the professional explanation of polymorphism, I can find the answers to some questions in this article "recognizing the differences between abstract classes and interfaces. 1. What is polymorphism? Another important concept in Object-Oriented