黑马程序员之C#学习笔记: 使用Stream.Write方法向流中写字节数组

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在使用Write方法时，需要先使用Stream的CanWrite方法判断流是否可写，如下示例定义了一个MemoryStream对象，然后向内存流中写入一个字节数组

        using System;
　　using System.Collections.Generic;
　　using System.Linq;
　　using System.Text;
　　using System.IO;
　　namespace UseStreamWrite
　　{
　         　class Program
　         　{
　                    　static void Main(string[] args)
　                    　{
　　                              using (var ms = new MemoryStream())
　                             　{
　                                        　int count = 20;
　                                        　var buffer = new byte[count];
                                        　　for (int i = 0; i < count; i++)
　                                       　{
　                                                     　buffer[i] = (byte)i;
　                                       　}
　　                                      //将流当前位置设置到流的起点
　                                      　ms.Seek(0, SeekOrigin.Begin);
　                                      　Console.WriteLine("ms position is " + ms.Position);
　                                    　//注意在调用Stream的Write方法之前要用CanWrite判断Stream是否可写
　                                     　if (ms.CanWrite)
　                                      　{
　                                                  　ms.Write(buffer, 0, count);
　　                                       }
　　                                      //正确写入的话，流的位置会移动到写入开始位置加上写入的字节数
　                                        　Console.WriteLine("ms position is " + ms.Position);
　                                　}
　                                　Console.Read();
                       　　}
             　}

}

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