问题描述
我首先使用 Entity Framework 5 代码
.我的表有一个名为 Active
的列,它的数据类型是 int
类型.存储在 Active 中的值是 0
、1
和 null
.
I am using Entity Framework 5 code first
. My table has a column called Active
and its datatype is of type int
. The values that are stored in Active are 0
, 1
and null
.
我有一个类需要映射到该表.
I have a class that I need to map to this table.
public class CommandExecutionServer : IEntity
{
public int Id { get; set; }
public bool? IsActive { get; set; }
}
这是我的配置文件.我正在尝试将我的类中的布尔属性映射到数据库中的整数字段.
Here is my configuration file. I am trying to map my boolean property in my class to the integer field in the database.
class CommandExecutionServerConfiguration : EntityTypeConfiguration<CommandExecutionServer>
{
internal CommandExecutionServerConfiguration()
{
this.ToTable("tblCommandExecutionServers");
this.Property(x => x.IsActive).HasColumnName("Active").HasColumnType("bit");
}
}
这不是很好.我得到的错误是:
This is not working well. The error that I am getting is:
The 'IsActive' property on 'CommandExecutionServer' could not be set to a 'Int32' value. You must set this property to a non-null value of type 'Boolean'
我尝试添加 .HasColumnType("bit")
并认为它可能会解决我的问题.我该怎么做呢?理想情况下,我希望 0 为假,1 为真,null 为空,任何其他数字为假.
I tried adding .HasColumnType("bit")
and thought that it might take of my problem. How do I do this? Ideally I would like 0 to be false, 1 to true, null to be null, and any other number to false.
更新
如果我将以上内容更改为:
If I change the above to:
this.Property(x => x.IsActive).HasColumnName("Active").HasColumnType("int");
...然后我收到以下错误:
...then I get the following error:
Member Mapping specified is not valid. The type 'Edm.Boolean[Nullable=True,DefaultValue=]' of member 'IsActive' in type 'MyProject.Infrastructure.EntityFramework.CommandExecutionServer' is not compatible with 'SqlServer.int[Nullable=True,DefaultValue=]' of member 'Active' in type 'CodeFirstDatabaseSchema.CommandExecutionServer'.
推荐答案
我尝试了以下,因为我不知道 Entity Framework 是否可以为我处理转换.
I tried the following because I do not know if Entity Framework can handle the conversion for me.
我删除了这一行:
this.Property(x => x.IsActive).HasColumnName("Active").HasColumnType("int");
然后我向我的 CommandExecutionServer 类
添加了一个属性:
I then added a property to my CommandExecutionServer class
:
public class CommandExecutionServer : IEntity
{
public int Id { get; set; }
public int? Active { get; set; }
public bool IsActive
{
get
{
return (Active == 1) ? true : false;
}
}
}
可能有更好的方法,但目前这对我有用.如果有人可以做得更好,请继续:)
There might be a better way but this works for me for now. If any one can better this then please go ahead :)