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