我知道这个问题已经被问过一次了这里,但没有必要在自定义类型转换器中调用 Automapper.Map() 方法。那么如果我有这种类型的结构呢:
class MyType
{
public double ValueToBeComputed1 { get; set; }
public double ValueToBeComputed2 { get; set; }
}
class ComplexType
{
public double ValueToBeComputed { get; set; }
public MyType MyProperty { get; set; }
}
对于要计算的所有值,我需要进行不同的演算,因此我将为复杂类型提供一个自定义类型转换器,例如 OtherType。我的问题是我是否能够在该自定义转换器中为属性 MyProperty 调用 Mapper.Map()?
在我面对过时的文档 Automapper 自定义类型转换器之后,其中 ITypeConverter 接口已更改,我在这里找到了答案:ITypeConverter 接口在 AutoMapper 2.0 中已更改,我能够制作一个工作原型,该原型生成转换后的类型如下:
public class ComplexTypeConverter : ITypeConverter<ComplexSourceType, ComplexDestinationType>
{
public ComplexDestinationType Convert(ResolutionContext context)
{
var source = (ComplexSourceType)context.SourceValue;
return new ComplexDestinationType
{
MyProperty = Mapper.Map<SourceType, DestinationType>(source.MyProperty),
ValueComputed = source.ValueToBeComputed + 10
};
}
}
public class TypeConverter : ITypeConverter<SourceType, DestinationType>
{
public DestinationType Convert(ResolutionContext context)
{
var source= (SourceType)context.SourceValue;
return new DestinationType
{
ValueComputed1 = source.ValueToBeComputed1 + 10,
ValueComputed2 = source.ValueToBeComputed2 + 10
};
}
}
class Program
{
static void Main(string[] args)
{
Mapper.Initialize(cfg => {
cfg.CreateMap<ComplexSourceType, ComplexDestinationType>().ConvertUsing(new ComplexTypeConverter());
cfg.CreateMap<SourceType, DestinationType>().ConvertUsing(new TypeConverter());
});
Mapper.AssertConfigurationIsValid();
ComplexSourceType source = new ComplexSourceType
{
MyProperty = new SourceType
{
ValueToBeComputed1 = 1,
ValueToBeComputed2 = 1
},
ValueToBeComputed = 1
};
var dest = Mapper.Map<ComplexSourceType, ComplexDestinationType>(source);
}
}
dest 对象保存修改后的数据,每个属性上有 11