ASP.NET c# 把服务器上绝对路径的图片以二进制流形式显示图片

string fileName = filename;
string savePath = ConfigurationManager.AppSettings["uploadFolder"];
savePath = Path.Combine(savePath,orderid,fileName);

FileStream fs = new FileStream(savePath, FileMode.Open, FileAccess.Read);
byte[] byData = new byte[fs.Length];
fs.Read(byData, 0, byData.Length);
fs.Close();

System.IO.MemoryStream ms = new System.IO.MemoryStream(byData);
System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
img.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
img.Dispose(); //文章来源 bbwfang