Automapper：忽略的条件 [英] Automapper: Ignore on condition of

问题描述

是否有可能忽略映射取决于源属性的值一员？

Is it possible to ignore mapping a member depending on the value of a source property?

例如，如果我们有：

public class Car
{
 public int Id { get; set; }
 public string Code { get; set; }
}

public class CarViewModel
{
 public int Id { get; set; }
 public string Code { get; set; }
}

我正在寻找类似

Mapper.CreateMap<CarViewModel, Car>()
 .ForMember(dest => dest.Code, opt => opt.Ignore().If(source => source.Id == 0))

到目前为止，我有过使用两个不同的视图模型，并为每一个创建不同的映射的唯一解决方案。

So far the only solution I have is too use two different view models and create different mappings for each one.

推荐答案

忽略（）的特点是严格的会员你永远映射，因为这些成员也在配置验证跳过。我查了几个选项，但它看起来并不像之类的自定义值解析器会做的伎俩。相反，我将着眼于增加一个条件跳过配置选项，如：

The Ignore() feature is strictly for members you never map, as these members are also skipped in configuration validation. I checked a couple of options, but it doesn't look like things like a custom value resolver will do the trick. Instead, I'll look at adding a conditional Skip configuration option, like:

Mapper.CreateMap<CarViewModel, Car>()
 .ForMember(dest => dest.Code, opt => opt.Condition(source => source.Id == 0))

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