Stream(流)的基本操作

//把流转化为文件 
 public static void StreamToFile(Stream stream, string filepath)    {      byte[] bytes = StreamToBytes(stream);      FileStream fileStream = new FileStream(filepath, FileMode.Create);      fileStream.Write(bytes, 0, bytes.Length);      fileStream.Flush();      fileStream.Close();    }
//把流转化为字节数组    public static byte[] StreamToBytes(Stream stream)    {      MemoryStream memoryStream = new MemoryStream();      stream.CopyTo(memoryStream);      return memoryStream.ToArray();    }
//把流转化为Base64字符串
    public static string StreamToString(Stream stream)    {      byte[] buffer = new byte[stream.Length];      stream.Read(buffer, 0, (int)stream.Length);      string base64string = Convert.ToBase64String(buffer);      return base64string;    }

//把Base64字符串转化为流

   　pubblic static Stream StringToStream(string str)
　　　　{
　　　　　　　byte[] bt = Convert.FromBase64String(str);
            System.IO.MemoryStream stream = new System.IO.MemoryStream(bt);
　　　　}

求补充。。。。。。。。。。。。。。

原标题：Stream(流)的基本操作

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