1 //图片的"读"操作 2 //①参数是图片路径:返回Byte[]类型: 3 //参数是图片的路径 4 public byte[] GetPictureData(string imagePath){ 5 FileStream fs=new FileStream(imagePath,FileMode.Open); 6 byte[] byteData=http://www.mamicode.com/new byte[fs.Length]; 7 fs.Read(byteData,0,byteData.Length); 8 fs.Close(); 9 return byteData();10 }11 //②参数类型是Image对象，返回Byte[]类型12 //将Image转换成流数据，并保存为byte[] 13 public byte[] PhotoImageInsert(System.Drawing.Image imgPhoto)14 {15  MemoryStream mstream = new MemoryStream();16  imgPhoto.Save(mstream, System.Drawing.Imaging.ImageFormat.Bmp);17  byte[] byData = http://www.mamicode.com/new Byte[mstream.Length];18  mstream.Position = 0;19  mstream.Read(byData, 0, byData.Length); mstream.Close();20  return byData;21 }22 //图片的“写”操作23 //①参数是Byte[]类型，返回值是Image对象24 public System.Drawing.Image ReturnPhoto(byte[] streamByte)  25 {  26  System.IO.MemoryStream ms = new System.IO.MemoryStream(streamByte);  27  System.Drawing.Image img = System.Drawing.Image.FromStream(ms);  28  return img;  29 }  30 //②参数是Byte[] 类型，没有返回值（ASP.NET输出图片）31 public void WritePhoto(byte[] streamByte)  32 {  33  // Response.ContentType 的默认值为默认值为“text/html”  34  Response.ContentType = "image/GIF";  35  //图片输出的类型有: image/GIF     image/JPEG  36  Response.BinaryWrite(streamByte);  37 }