.net stream - a brief introduction to the stream type system

黄舟

Release： 2017-02-24 10:42:38

Original

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Type system of streams

##Data transmissionOperations on file streams become simpler

Basic flow

##Basic flow	Decorator flow	Wrapper class	Help class
Inherits from basic streamstream	Function added on the basicStream

It still feels quite Java-like.

Decorator flow

## Stream

The corresponding backing storage is file

Memory

Network resource

FileStream

MemoryStream

NetWorkStream

IsolatedStorgaeFileStream:

Inherits from FileStream

##System.net.security##Enhanced Caching

The Lenovo Decorator pattern is estimated to add some other functions to the basic stream, which is a bit like an extension of the functions of the basic type.

Wrapper class

Introduces streams for data transmission;

##BufferdStream	DeflateStream	GZipStream	CryptoStream	AuthenticatedStream
System.io	System.IO.Compression	System.IO.Compression	System .Security.Cryptography
Compression	Decompression	Encryption and Decryption	Security

 #region StringReader，StringWriter的使用；

//                string text = @"姓名：水田如雅；
//                                年龄：20；
//                                性别：女";
//                StringReader reader = new StringReader(text);
//                int c = reader.Read();
//                Console.WriteLine((char)c);

//                char[] buffer = new char[7];
//                reader.Read(buffer, 0, buffer.Length);
//                Console.WriteLine(string.Join("", buffer));

//                string line = reader.ReadLine();
//                Console.Write(line);

//                string rest = reader.ReadToEnd();
//                Console.WriteLine(rest);

//                reader.Dispose();
//                Console.ReadKey();

            #endregion

            #region streamreader/StreamWriter的使用

                //FileStream fs = new FileStream("AboutVac.txt", FileMode.Open, FileAccess.Read);
                //StreamReader reader=new StreamReader(fs,Encoding.GetEncoding("GB2312"));

                //do
                //{
                //    Console.WriteLine(reader.ReadLine());

                //} while (reader.Read()>0);

                //StreamWriter writer = new StreamWriter("aboutMe.txt", false, Encoding.UTF8);
                //writer.Write("hello,word");
              
                //reader.Dispose();
                //writer.Dispose();

                //Console.ReadKey();


            #endregion

            #region BinaryReader/BinaryWriter的使用

                //Product product = new Product("Product.txt") { 
            
                //        id=110,
                //        price=123.3,
                //        Name="lhc"
            
                //};
                //product.Save();
                //Product newItem =new  Product("Product.txt");
                //newItem.Load();
                //Console.WriteLine(newItem);
                //Console.ReadKey();
                


            #endregion

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public class Product {

        public int id { get; set; }
        public string Name { get; set; }
        public double price { get; set; }

        private string filePath;
        public Product(string filePath) { this.filePath = filePath; }

        public void Save() {

            FileStream fs = new FileStream(this.filePath, FileMode.Create, FileAccess.Write);
            BinaryWriter writer = new BinaryWriter(fs);
            writer.Write(this.id);
            writer.Write(this.Name);
            writer.Write(this.price);
            writer.Dispose();
        }

        public void Load() {

            FileStream fs = new FileStream(this.filePath, FileMode.Open, FileAccess.Read);
            BinaryReader reader = new BinaryReader(fs);
            this.id = reader.ReadInt32();
            this.Name = reader.ReadString();
            this.price = reader.ReadDouble();
            reader.Dispose();
        
        }

        public override string ToString()
        {
            return string.Format("ID:{0},Name:{1},Price:{2}", this.id, this.Name, this.price);

        }
    }

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Help class

Namespace:system.io

##TextWriter

TextReader(defined set of Universal way to read and write character data)

StreamReader

StreamWriter：

##1

, inherited from TextWriter

Text

Reader defines a set of common methods for reading and writing character data

2, suitable for reading and writing text characters

BinaryReader

: used to read binary data into the stream Way to write primitive types

BinaryWriter

: Used to read primitive types from streams

ringReaderStringWriter:

1, also inherited from

TextWriter

Text

Reader, used to process strings

Create;Processing path

##File

FileInfo

Path

##Directory

/DirecoryInfo

Open;

openRead;

openWrite;

Copy;

  #region 工具类示例
               // File.WriteAllText("FileTest.txt", "hello,i&#39;m using file ", Encoding.UTF8);
  #endregion

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When using it, you should first consider whether the existing high-level classes encapsulate the available methods. If not, then consider using basic classes for encapsulation.

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