数据库读取二进制图片显示到PictureBox中

1、已知路径，加载本地图片到Image中

　　Image img = Image.FromFile("路径"); 

2、数据库中读取二进制图片

　　string strSql = "Select Top 1 ImageContent From TT_ImageFileSave)";

　　Byte[] byteImage = new Byte[0];

　　byteImage = (Byte[])(DbHelperSQL.GetSingle(strSql));

　　MemoryStream stmBLOBData = new MemoryStream(byteImage);

　　picCarInfo.Image = Image.FromStream(stmBLOBData);

3、将已知路径图片转换为二进制

　　string strImagePath = AppDomain.CurrentDomain.BaseDirectory + "//Tickets//Ticket.jpg";

　　FileStream fileStream = new FileStream(strImagePath, FileMode.Open, FileAccess.Read);

　　BinaryReader binaryReader = new BinaryReader(fileStream);

　　byte[] byteImage = binaryReader.ReadBytes((int)fileStream.Length);

　　binaryReader.Close(); fileStream.Close(); File.Delete(strImagePath);

　　return byteImage;

4、将现有Image图片转化为二进制 

 　  MemoryStream mStream = new MemoryStream();
　　byte[] bytImagedata = null; 
　　pictureBox1.Image.Save(Ms,System.Drawing.Imaging.ImageFormat.Bmp);　　

　　bytImagedata = mStream.GetBuffer();     return bytImagedata;

http://www.cnblogs.com/zhangpengshou/archive/2011/04/24/1749391.html