二进制文件操作

读文件

FileStream fs = new FileStream(Server.MapPath("test.txt"),FileMode.Open); byte[] data = new byte[fs.Length]; fs.Read(data,0,(int)fs.Length); foreach (byte b in data) { Response.Write(b.ToString()); } fs.Close();

写文件

FileStream fs = new FileStream(Server.MapPath("textfile.txt"), FileMode.Append, FileAccess.Write, FileShare.Read, FileOptions.Asynchronous); byte[] data = System.Text.Encoding.ASCII.GetBytes("这是附加信息"); fs.Write(data, 0, data.Length); fs.Flush(); fs.Close();