连贯的NHibernate BinaryBlobType [英] Fluent NHibernate BinaryBlobType

问题描述

今天我正在研究一个MySQL数据库，我不知道如何映射一个字节[]到一个BLOB列...

我的表这样看来：

  CREATE TABLE`images`（
`Id` INT NOT NULL AUTO_INCREMENT，
 `imgText` VARCHAR（45）NULL，
`image` BLOB NULL，
 PRIMARY KEY（`Id`））; 
  

映射：

  public class imagesMap：ClassMap< images> {
 public imagesMap（）{
 Id（x => x.Id）; 
 Map（x => x.imgText）; 
 Map（x => x.image）.CustomType< BinaryBlobType>（）; 
 
 
 
 
 $ b 
 Buisnessobject：
 
 
  public class images {
 
 public virtual int Id {get; set;} 
 public virtual string imgText {get; set; } 
 public virtual Byte [] image {get; set;} 
} 
  
如果我开始我的应用程序，我立即得到一个例外：
 
 
 NHibernate.MappingException：无法实例化类型BinaryBlobType：System.MissingMethodException 
他说这个IType是没有构造函数定义
 
 
我不能unterstand为什么它不工作，大家告诉我，我只需要映射CustomType（）
 
 
 
我很感激每一个帮助！
 
 
 Greetz，Benni  
 
解决方案10分钟后，我自己找到了解决问题的办法。
 
 
 
对于那些也陷入这个问题的人们来说：
 > 
 
 
映射a 
 
 
 公共虚拟字节[]阵列; 
  
对于BLOB，您不需要定义自定义类型，FNH甚至可以自动 
 
 
字节数组的映射应该是这样的：
 
 $ p $ 地图（X => x.array）; 
  




today i'm working on a MySQL Database, and i don't know how to Map a Byte[] to a BLOB Column...

My Table looks this way:

CREATE  TABLE `images` (
`Id` INT NOT NULL AUTO_INCREMENT ,
`imgText` VARCHAR(45) NULL ,
`image` BLOB NULL ,
 PRIMARY KEY (`Id`) );

Mapping:

public class imagesMap : ClassMap<images> {
    public imagesMap() {
        Id(x => x.Id);
        Map(x => x.imgText);
        Map(x => x.image).CustomType<BinaryBlobType>();
    }
}

Buisnessobject:

public class images {

    public virtual int Id{get;set;}
    public virtual string imgText{get;set;}
    public virtual Byte[] image{get;set;}
}

If i Start my Application i got instantly a Exception:

NHibernate.MappingException: Could not instantiate IType BinaryBlobType: System.MissingMethodException He says for this IType is "No Constructor defined"

I can't unterstand why it is not working, everybody told me i only has to map the CustomType()

I would appreciate each help!

Greetz, Benni

解决方案

Ok, 10 Minutes later i found the Solution for my Problem by myself.

For everybody who also get stuck with this Problem:

For Mapping a

public virtual byte[] array;

To a BLOB you don't need to Define a custom Type, FNH does even this "automagically".

The Mapping for the Byte-Array should work so:

Map(x=>x.array);

这篇关于连贯的NHibernate BinaryBlobType的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！