AutoMapper自动创建createMap

问题描述

我有一个正在调用另一个服务的服务.两种服务都使用相同的类".这些类的名称相同且具有相同的属性，但具有不同的命名空间，因此我需要使用AutoMapper将一种类型映射到另一种类型.

I have a services that is calling another services. Both of the services are using "the same classes". The classes are named same and have the same properties but has different namespace so I need to use AutoMapper to map from one of the type to the other type.

不，这很简单，因为我要做的只是CreateMap<>，但是问题是我们大约需要数百个类来手动编写CreateMap<>，并且可以将其连接到我身上.没有任何自动CreateMap功能.因此，如果我说CreateMap()，则AutoMapper通过Organization工作并找到所有类，并对这些类及其子类等自动执行CreateMap

No it's pretty simple since all I have to do is the CreateMap<>, but the problem is that we have around hundreds of classes that I manually needs to write the CreateMap<> from, and it's works wired to me. Isn't there any Auto CreateMap function. So if I say CreateMap() then AutoMapper workes thru Organisation and finds all classes and automatically does the CreateMap for these Classes and it's subclasses etc etc…

希望有一个简单的解决方案，或者我想可以通过一些反射来解决它...

Hope for a simple solution, or I guess some reflection can fix it...

推荐答案

只需在选项中将CreateMissingTypeMaps设置为true:

Just set CreateMissingTypeMaps to true in the options:

var dto = Mapper.Map<FooDTO>
     (foo, opts => opts.CreateMissingTypeMaps = true);

如果您需要经常使用它，请将lambda存储在委托字段中:

If you need to use it often, store the lambda in a delegate field:

static readonly Action<IMappingOperationOptions> _mapperOptions =
    opts => opts.CreateMissingTypeMaps = true;

...

var dto = Mapper.Map<FooDTO>(foo, _mapperOptions);

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更新:

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UPDATE:

上述方法在AutoMapper的最新版本中不再适用.

The approach described above no longer works in recent versions of AutoMapper.

相反，您应该将CreateMissingTypeMaps设置为true来创建一个映射器配置，并从该配置创建一个映射器实例:

Instead, you should create a mapper configuration with CreateMissingTypeMaps set to true and create a mapper instance from this configuration:

var config = new MapperConfiguration(cfg =>
{
    cfg.CreateMissingTypeMaps = true;
    // other configurations
});
var mapper = config.CreateMapper();

如果您想继续使用旧的静态API(不再推荐)，也可以执行以下操作:

If you want to keep using the old static API (no longer recommended), you can also do this:

Mapper.Initialize(cfg =>
{
    cfg.CreateMissingTypeMaps = true;
    // other configurations
});

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