[英]Automapper use destination properties and map single property
I want to use automapper to map between 2 lists. 我想使用自动映射器在2个列表之间进行映射。 One list contains a code and a string, the other contains the code and other fields.
一个列表包含一个代码和一个字符串,另一个包含代码和其他字段。 I want to use all the existing values/properties on the destination object, except for one.
我想使用目标对象上所有现有的值/属性,除了一个。 Is this possible with automapper?
automapper有可能吗? I don't want to specify all the properties with a UseDestinationValue().
我不想使用UseDestinationValue()指定所有属性。 Tried the following but instead of returning my destination list with the one property updated, it returns a new list with only matching items (in both lists) and all the fields are null:
尝试了以下操作,但是它没有返回更新了一个属性的目标列表,而是返回了一个仅包含匹配项的新列表(在两个列表中),并且所有字段均为空:
public static IMappingExpression<TSource, TDest> UseAllDestinationValues<TSource, TDest>(this IMappingExpression<TSource, TDest> expression)
{
expression.ForAllMembers(opt => opt.UseDestinationValue());
return expression;
}
Mapper.CreateMap<Perm, PermViewModel>()
.UseAllDestinationValues()
.ForMember(dest => dest.CanEdit, opt => opt.MapFrom(s => s.editable));
var items = Mapper.Map<List<Perm>, List<PermViewModel>>(list, model.Items.Items);
I had to do something sort of similar using nullable doubles from one application to another. 我必须使用从一个应用程序到另一个应用程序的可为空的double来做类似的事情。 You could set up a type converter.
您可以设置一个类型转换器。 Without your specific classes I can't speak to exactly how to do this, but here is my example.
没有您的特定班级,我无法确切地说出该如何做,但这是我的示例。
Mapper.CreateMap<double?, double>().ConvertUsing<NullableDoubleConverter>();
private class NullableDoubleConverter : TypeConverter<double?, double>
{
protected override double ConvertCore(double? source)
{
if (source == null)
return Constants.NullDouble;
else
return (double)source;
}
}
You could obviously adapt this using something like. 您显然可以使用类似的方法对此进行调整。
Mapper.CreateMap<Perm, PermViewModel>().ConvertUsing<PermConverter>();
private class PermConverter : TypeConverter<Perm, PermViewModel>
{
protected override PermViewModel ConvertCore(Perm source)
{
return new PermViewModel()
{
//Set your parameters here.
};
}
}
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