将图片保存到ORACEL数据库和读取数据显示到页面

一.读取客户端文件，返回Byte[]




        /**//// <summary>


        /// 读取客户端图片文件


        /// </summary>


        /// <param name="input">HtmlInputFile控件</param>


        /// <returns>返回文件的Byte值</returns>


        private byte[] UpLoadFile(HtmlInputFile input,TextBox txtPhotoPath)




        ...{


            byte[] btImage = null;




            if(input.Value != String.Empty && input.Value == txtPhotoPath.Text)




            ...{


                try




                ...{


                    System.IO.Stream streamImage = input.PostedFile.InputStream ;


                    btImage = new byte[streamImage.Length];


                    streamImage.Read(btImage,0,(int)streamImage.Length);


                }


                catch(Exception e)




                ...{


                    throw new Exception(e.Message,e);


                }


            }




            return btImage; 


        }

 

二.添加到ORACLE数据




        /**//// <summary>


        /// 添加图片至数据库


        /// </summary>


        /// <param name="btImge">图片二进制数据</param>


        /// <returns></returns>


        public string GetUpdateSQL(Byte[] btImge)




        ...{


            string UpdateSql = null;


            Database db = DatabaseFactory.CreateDatabase();




            using (IDbConnection conn = db.GetConnection())




            ...{            


                    


                DBCommandWrapper dbCmd = db.GetStoredProcCommandWrapper(sqlMag.GetSQL("getupdatesql"));




                                                dbCmd.AddParameter("Image",OracleType.LongRaw,btImage.Length,ParameterDirection.Input,


                                                    true,0,0,"FileText",DataRowVersion.Default,btImge);        


                                                                                    db.ExecuteNonQuery(dbCmd);


            }


        }

 

三.在页面上显示

    /// <summary>
  /// 取得用户照片信息
  /// </summary>
  private void GetStaffPhoto()
  {
   //从数据库中取得数据
   DBDycnamicCreateControls dyc = new DBDycnamicCreateControls(_sourceId,1);
   DataSet ds = dyc.QuerySingleRecordData(_recordId);

   try
   {
    //存为内存流
    Stream streamImg = new MemoryStream((byte[])ds.Tables[0].Rows[0][_fieldName]);
    //保存到图片中
    System.Drawing.Bitmap imgPhoto = new System.Drawing.Bitmap(streamImg,true);
    //保存到位图中，并输出到页面
    imgPhoto.Save(Response.OutputStream,System.Drawing.Imaging.ImageFormat.Jpeg);
   }
   catch(Exception ee)
   {
    throw new Exception(ee.Message,ee);
   }
  }