cs 代码

/// <summary>
    /// 添加一个图片
    /// </summary>
    public void AddImageToOracle()
    {
        AdvertisementManager am = new AdvertisementManager();
        Advertisement a = new Advertisement();
        string file_name = "C:\\szs.jpg";
        FileStream fs = new FileStream(file_name, FileMode.OpenOrCreate, FileAccess.Read);
        byte[] MyData = new byte[fs.Length];
        fs.Read(MyData, 0, System.Convert.ToInt32(fs.Length));
        fs.Close();
        a.AdImage = MyData;
        am.AddAdvertisement(a);

    }
    /// <summary>
    /// 读取一个图片
    /// </summary>
    public void ShowImageFromOracle()
    {
        AdvertisementManager am = new AdvertisementManager();
        Advertisement a = new Advertisement();
        a = am.GetAdvertisementById(41);
        byte[] bytes = a.AdImage;
        Response.AppendHeader("Content-Length", bytes.Length.ToString());
        Response.BinaryWrite(bytes);
    }

配置

普通的配置就可以

<insert id="Advertisement.Insert" parameterClass="Advertisement">
            INSERT INTO AD_ADVERTISEMENT (ID,AD_NAME,AD_TYPE,AD_STATE,AD_WIDTH,AD_HEIGHT,AD_IMAGE,AD_CODE)
             VALUES (#Id#,#AdName#,#AdType#,#AdState#,#AdWidth#,#AdHeight#,#AdImage#,#AdCode#)
            <selectKey resultClass="int" type="pre" property="Id" >
                SELECT seq_AD_ADVERTISEMENT.NEXTVAL AS VALUE FROM DUAL
            </selectKey> 
        </insert>

Po 对于大字段的对应属性，用byte[]就可以了

/// <summary>
        /// 图片
        /// </summary>
        private byte[] adimage;
        /// <summary>
        /// 图片
        /// </summary>
        public byte[] AdImage
        {
            get{return adimage;}
            set{adimage = value;}
        }