在C#中从SQL Server检索图像

using (SqlConnection conn = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Documents and Settings\\meekun.poon\\My Documents\\Visual Studio 2008\\Projects\\TrackLocation\\TrackLocation\\barcodePrinter.mdf;Integrated Security=True;User Instance=True"))
                    {
                        conn.Open();
                        using (SqlCommand cmd = new SqlCommand("SELECT ImageName FROM Image WHERE ImageID='PL001'", conn))
                        {
                            SqlDataAdapter adpt = new SqlDataAdapter(cmd);
                            DataSet dataSet = new DataSet();
                            adpt.Fill(dataSet, "Image"); 
                            DataRow Row;
                            Row = dataSet.Tables["Image"].Rows[0];
                            byte[] MyImg = (byte[])Row[0];
                            MemoryStream ms = new MemoryStream(MyImg);
                            ms.Position = 0;
                                
                            Image img = Image.FromStream(ms); //error 
                            
                         pictureBox1.Image = img;
                            
                        }
                        conn.Close();
                    }

如何解决这个问题呢??? imagename是图像数据类型！错误消息->参数无效.紧急！！！感谢

how to solve this problem??? imagename is image data type!! error message->parameter is not valid. URGENT!!! thanks