ASP.NET中映射中的数据本地化零 [英] Data localization in mapping in ASP.NET Zero
本文介绍了ASP.NET中映射中的数据本地化零的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想知道是否有一种方法可以基于DTO映射中的数据使用本地化,例如:
I'd like to know if there is a way to use localization based on data in the mapping of DTOs, something like:
public class EntityX : FullAuditedEntity, IMustHaveTenant
{
public virtual int TenantId { get; set; }
public virtual ICollection<EntityXTranslation> Translations { get; set; }
}
public class EntityXTranslation
{
public virtual int EntityXId { get; set; }
public int LanguageId { get; set; }
public string Name { get; set; }
}
public class EntityXDto : FullAuditedEntityDto
{
public string Name { get; set; }
}
configuration.CreateMap<EntityX, EntityXDto>()
.ForMember(dto => dto.Name, options =>
{
var languageId = 1; //TODO: get current language
options.MapFrom(uom => uom.Translations.FirstOrDefault(t => t.LanguageId == languageId).Name);
});
推荐答案
好吧,经过几个小时的调查,我找到了一种不错的方法:
Okay, after a couple of hours investigation I got a nice way to do it:
configuration.CreateMap<UnitOfMeasure, UnitOfMeasureListItem>()
.ForMember(dto => dto.Name, options =>
MapFromTranslated<EntityX,
EntityXTranslation,
EntityXDto,
string>(options, t => t.Name));
void MapFromTranslated<TSource, TTranslation, TDestination, TMember>
(IMemberConfigurationExpression<TSource, TDestination, TMember> options,
Expression<Func<TTranslation, TMember>> member)
where TSource : IHaveTranslations<TTranslation>
where TTranslation : TranslationEntity
{
options.MapFrom(uom => MapTranslation(uom, member));
options.MapAtRuntime();
}
TMember MapTranslation<TSource, TTranslation, TMember>
(TSource entity, Expression<Func<TTranslation, TMember>> member)
where TSource : IHaveTranslations<TTranslation>
where TTranslation : TranslationEntity
{
var languageName = CultureInfo.CurrentUICulture.Name.Split('-').FirstOrDefault();
var translation = entity.Translations.FirstOrDefault(t => t.Language.Name.Contains(languageName)) ?? entity.Translations.FirstOrDefault(t => t.LanguageId == 1);
var translationParameter = Expression.Parameter(typeof(TTranslation), "t");
var targetProperty = Expression.Property(translationParameter, ((MemberExpression)member.Body).Member.Name);
var action = Expression.Lambda<Func<TTranslation, TMember>>(targetProperty, translationParameter);
return action.Compile().Invoke(translation);
}
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