C#中流的使用和分类

//FileMode.Create, FileMode.Append 
//FileAccess.Write, FileAccess.ReadWrite 
//FileMode和FileAccess搭配使用，如果第二个参数FileMode.Appden写追加,第三个参数FileAccess.Read只读，会抛异常 
Stream source = new FileStream(@"1.jpg",FileMode.Open, FileAccess.Read) 
byte[] buffer = new byte[source.Length]; 
int bytesRead = source.Read(buffer, i, (int)source.Length);

Stream target = new FileStream(@"2.jpg", FileMode.Create, FileAccess.Write);
 
Stream source = new FileStream(@"1.jpg",FileMode.Open, FileAccess.Read) 
byte[] buffer = new byte[source.Length]; 
int bytesRead = source.Read(buffer, i, (int)source.Length);
 
target.Write(buffer, 0, buffer.Length); 
source.Dispose(); 
target.Dispose();

int BufferSize = 10240; // 10KB 
Stream source = new FileStream(@"D:\a.mp3", FileMode.Open, FileAccess.Read); 
Stream target = new FileStream(@"D:\b.mp3", FileMode.Create, FileAccess.Write);
 
byte[] buffer = new byte[BufferSize]; 
int byteRead; 
do{ 
    byteRead = source.Read(buffer, 0, BufferSize); 
    target.Write(buffer, 0, bytesRead); 
} while(byteRead > 0); 
target.Dispose(); 
source.Dispose();

FileStream fs = new FileStream("a.txt", FileMode.Open, FileAcess.Read); 
StreamReader reader = new StreamReader(fs, Encoding.GetEncoding("GB2312"));
 
//或者 
//StreamReader reader = new StreamReader("a.txt"); //默认采用UTF-8编码方式

string text = 
@"aa 
bb 
cc";
 
StringReader reader = new StringReader(text); 
int c = reader.Read(); 
Console.Write((char)c);
 
char[] buffer = new char[8]; 
reader.Read(buffer, 0, buffer.Length); 
Console.Write(String.Join("",buffer));
 
string line = reader.ReadLine(); 
Console.WriteLine(line);
 
string rest = reader.ReadToEnd(); 
Console.Write(); 
reader.Dispose();

namespace ConsoleApplication29 
{ 
    class Program 
    { 
        static void Main(string[] args) 
        { 
            Product p = new Product("product.bin") 
            { 
                Id = 1, 
                Name = "GOOD", 
                Price = 500F 
            }; 
            p.Save();
 
            Product newP = new Product("product.bin"); 
            newP.Load(); 
            Console.WriteLine(newP); 
            Console.ReadKey(); 
        } 
    }
 
    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); 
        } 
    } 
}