转:NHibernate和SqlImage

 

开发中遇到一个问题SqlServer的Image类型影射为byte[]时截断了数据，变成8k，查了下NH文档，

Table 5.5. Large Object Mapping Types

NHibernate Type	.NET Type	Database Type	Remarks
StringClob	System.String	DbType.String	type="StringClob" must be specified. Entire field is read into memory.
BinaryBlob	System.Byte[]	DbType.Binary	type="BinaryBlob" must be specified. Entire field is read into memory.
Serializable	Any System.Object that is marked with SerializableAttribute.	DbType.Binary	type="Serializable" should be specified. This is the fallback type if no NHibernate Type can be found for the Property.

解决如下

原hbm.xml

         <property   name="NH_FileContent" type="byte[]">
             <column name="FileContent" length="2147483647" sql-type="image" not-null="false"/>
         </property>

改为

         <property   name="NH_FileContent" type="BinaryBlob">
             <column name="FileContent" length="2147483647" sql-type="image" not-null="false"/>
         </property>

.net中的类型不用改

 

此内容来自http://hi.baidu.com/zhanglin34/blog/item/03ac5e9558f6514cd0135e39.html