filestream

An existing object (objectA) needs to be serialized into a binary file using BinaryFormatter: FileStream fileStream = new FileStream (path, FileMode. Create ); BinaryFormatter formatter = new BinaryFormatter (); Formatter. Serialize (fileStream, objectA ); The object objectA is defined as follows: [Serializable ()]Publ

the program command as Lena.jpg.The sample code is as follows: Public Static voidMain (string[] args) { //Read EXIF using(FileStream input = File.openread ("lena.jpg") {image Image=NewImage (input); varEXIF =image. Exifprofile.values; foreach(varIteminchEXIF) {Console.WriteLine (item. Tag+":"+item. Value); } } //Zoom using(

this attribute is not added, a serializationexception will be thrown ). Mark the book as serializable. of course, there is another way to make the class Book serializable, that is, implementing the iserializable interface. note that the serializable attribute cannot be inherited !!! If you don't want to serialize a variable, what should you do? It's easy to add the attribute [nonserialized] before it. For example, I don't want to serialize it. String author; Then I only need [Nonseria

This paper introduces in detail the method of converting C # between stream and byte[in the form of instance, and shares it for everyone's reference. Here's how:One or two conversion into picturesMemoryStream ms = new MemoryStream (bytes); Ms. Position = 0;image img = image.fromstream (ms); Ms. Close (); this.pictureBox1.ImageConversion code of byte[] and string in C #1.System.Text.UnicodeEncoding converter = new System.Text.UnicodeEncoding (); byte[] Inputbytes =converter. GetBytes (inputstring

Key knowledge points: 1. filestream file_read = new filestream ("1.txt", filemode. Open, fileaccess. Read); // only the read permission is allowed to open the 1.txt file. Parameter 1: "1.txt": file path, usually represented by string variables or string constants, for example," d: \ 1.txt "; Parameter 2: Filemode. Open: open mode. If this mode exists, it is opened; otherwise, an exception is thrown.

1. Use filestream to read and write files File Header: Using system;Using system. Collections. Generic;Using system. text;Using system. IO; Read File CoreCode: Byte [] bydata = new byte [100];Char [] chardata = new char [1000]; try{Filestream sfile = new filestream ("file path", filemode. Open );Sfile. Seek (55, seekorigin. Begin );Sfile. read (bydata, 0,100); /

File Processing must first import the namespace: using System.IO; // Implementation Background: a text box, a button, and VS2005 Method 1: Use FileStream // Instantiate a save file dialog boxSaveFileDialog sf = new SaveFileDialog ();// Set the file storage typeSf. Filter = "txt file | *. txt | all files | *.*";// If the user does not enter the extension, the suffix is automatically appended.Sf. AddExtension = true;// Set the titleSf. Title ="Write fil

This article mainly provides a class for reading the actual value of an Excel file using NPOI. The NPOI version used in this article is 1.2.5. NPOI. dll can be downloaded from the NPOI official website http://npoi.codeplex.com. If something is not properly written, I hope you can get an axe. View Code using System; Using System. Collections. Generic; Using System. Text; Using System. Data;Using System. IO;Using NPOI. HSSF. UserModel;Using NPOI. SS. UserModel; Namespace Common. Excel{Public stat

, 0xEF };Byte [] inputByteArray = new Byte [this. inputString. Length];Try{ByKey = System. Text. Encoding. UTF8.GetBytes (decryptKey. Substring (0, 8 ));DESCryptoServiceProvider des = new DESCryptoServiceProvider ();InputByteArray = Convert. FromBase64String (this. inputString );MemoryStream MS = new MemoryStream ();CryptoStream cs = new CryptoStream (MS, des. CreateDecryptor (byKey, IV), CryptoStreamMode. Write );Cs. Write (inputByteArray, 0, inputByteArray. Length );Cs. FlushFinalBlock ();Syst

: using (FileStream fout = new FileStream(src, FileMode.Open, FileAccess.Read)) 12: { 13: //only read 10 bytes 14: byte[] bout = new byte[10]; 15: fout.Read(bout, 0, 10); 16: 17: using (FileStream fin = new

Due to the openness of the Internet, any file may be tampered during transmission, and the uncertainty of the transmission process leads to a lack of effective methods to ensure the security of the file to be transmitted. To avoid the above situation, the most common practice is to provide a verification code with the file being transmitted. After receiving the file, the user recalculates the file verification code and compares it with the original verification code, if they do not match, the fi

The so-called Object serialization refers to saving the object to the stream steam (generally the disk file data stream, which can make the object "permanent "), you can re-read the data from the stream and recreate the object (called deserialization ). (1) define the serialized class, that is, add the [serializable] attribute. For example [Serializableattribute]Public class student{String name; Public string name{Get {return name ;}Set {name = value ;}}Public void sayhi (){Console. writeline ("

C #Write files C #File Processing must first import the namespace: using system.Io; // Implementation Background: a text box, a button, and vs2005 Method 1: Use filestream // Instantiate a save file dialog boxSavefiledialog Sf = new savefiledialog ();// Set the file storage typeSF. Filter = "TXT file | *. txt | all files | *.*";// If the user does not enter the extension, the suffix is automatically appended.SF. addextension = true;// Set the titleSF.

); Expensedata. readxml (xmlreader ); } Finally { If (sd1! = NULL) { Sd1.close (); } } Code 7-4 String name = @ "C: \ Documents \ wordapplication3.doc "; System. Io. filestream = NULL; Byte [] bytes = NULL; Try { Filestream = new system. Io. filestream ( Name, system. Io. filemode. Open, system. Io. fileaccess. Read ); Bytes = new byte [(INT)

As a chsarp developer, you must have learned the socket, and you know that the data transfor by network shoshould be rely on byte or XML. There I will give the usually type converter in socket transfor 1: String byte [] (use to fransfor message in socket) (1): String convert to byte [] String STR = "Wulong "; Byte [] bytearray = system. Text. encoding. Default. getbytes (STR ); // You also cocould select your own encode Accoding to the requirement of Project (2) byte [] convert to string Byte

Air File System Overview Adobe AIR provides a variety of classes to support access, create and manage files and their directories. These classes are included in the Flash. filesystem package, as follows: File A file object represents the path of a file or directory. Filemode The filemode class defines some string constants used as the open () and openasync () method parameters of the filestream class. These parameters determine the file operati

]) ;}} Return Sbresult. tostring ();} Public String Getmd5fromfile ( String Filename ){ Return Getmd5fromfile (filename, False );} Public String Getmd5fromfile ( String Filename, Bool Returnlowercase ){ Using (System. Io. Filestream Filestream = New System. Io. Filestream (Filename, system. Io. Filemode . Open, system. Io. Fileaccess . Read )){ MD5 MD5 = MD5 . Cr

encoding = new system. Text. utf8encoding ();This. outstring = encoding. getstring (Ms. toarray ());}Catch (system. Exception error){This. notemessage = Error. message;}}# Endregion# Region DES encrypted file/// /// DES encrypted file/// /// /// /// Public void filedesencrypt (){Byte [] bykey = NULL;Byte [] IV = {0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef };Try{Bykey = system. Text. encoding. utf8.getbytes (this. encryptkey. substring (0, 8 ));Filestrea