Automapper空字符串空 [英] Automapper null string to empty

问题描述

当我尝试映射具有空字符串属性的对象，目标也为空。是否有一个全球性的设置，我可以把上说，所有的空字符串应该被映射到空的？

When I try to map an object that has a null string property, the destination is also null. Is there a global settings I can turn on that says all null string should be mapped to empty?

推荐答案

这样的事情应该工作：

public class NullStringConverter : ITypeConverter<string, string>
  {
    public string Convert(string source)
    {
      return source ?? string.Empty;
    }
  }

而在你的配置类：

And in your configuration class:

public class AutoMapperConfiguration
{
    public static void Configure()
    {
        Mapper.CreateMap<string, string>().ConvertUsing<NullStringConverter>();

        Mapper.AddProfile(new SomeViewModelMapper());
        Mapper.AddProfile(new SomeOtherViewModelMapper());
        ...
    }
}

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