c# - AutoMapper 展平扩展方法

Question

我正在寻找使用源对象的扩展方法来展平源对象的最简单/最优雅的方法。

来源:

class Source
{
    public int Value1 { get; set; }
    public int Value2 { get; set; }
}

我想优雅映射的扩展方法:

static class SourceExtensions
{
    public static int GetTotal(this Source source)
    {
        return source.Value1 + source.Value2;
    }
}

目的地:

class Destination
{
    public int Value1 { get; set; }
    public int Value2 { get; set; }
    public int Total { get; set; }
}

有没有比这更好的方法(我不必调用每个扩展方法的方法)？

using NamespaceContainingMyExtensionMethods;
...
Mapper.CreateMap<Source, Destination>()
    .ForMember(destination => destination.Total,
        opt => opt.ResolveUsing(source => source.GetTotal()));

类似于:

Mapper.CreateMap<Source, Destination>()
    .ResolveUsingExtensionsInNamespace("NamespaceContainingMyExtensionMethods");

我知道我可以在源对象上使用继承层次结构，但在我的情况下，这并不理想。

我研究过: Does AutoMapper's convention based mappings work with LINQ extension methods?和 https://github.com/AutoMapper/AutoMapper/issues/34

Answer 1

将提交添加到我的分支并为此发出拉取请求。就像一个魅力!

提交:https://github.com/claycephus/AutoMapper/commit/e1aaf9421c63fb15daca02607d0fc3dff871fbd1

拉取请求:https://github.com/AutoMapper/AutoMapper/pull/221

通过指定要搜索的程序集来配置它:

Assembly[] extensionMethodSearch = new Assembly[] { Assembly.Load("Your.Assembly") };
Mapper.Initialize(config => config.SourceExtensionMethodSearch = extensionMethodSearch);
Mapper.CreateMap<Source, Destination>();