Question

我尝试在新版本的AutoMapper中实现IValueResolver接口。我已经实现了ResourceTypeResolver类，如下所示..

public interface IValueResolver<in TSource, in TDestination, TDestMember>
{
    TDestMember Resolve(TSource source, TDestination destination, TDestMember destMember, ResolutionContext context);
}

public class ResourceTypeResolver : IValueResolver<PMEasy.Model.Entity.Resource, PMEasy.Web.Models.Gantt.GanttResource, string>
{
    private ILookupService LookupService;
    public ResourceTypeResolver(ILookupService lookupService)
    {
        LookupService = lookupService;
    }
    public string Resolve(PMEasy.Model.Entity.Resource source, PMEasy.Web.Models.Gantt.GanttResource destination, string member, ResolutionContext context)
    {
        if (source.Type.HasValue && source.Type != Guid.Empty)
        {
            var resourceType = LookupService.GetLookupListByName("ResourceType").Where(con => con.GUID == source.Type.Value).FirstOrDefault();
            return resourceType != null ? resourceType.Value : string.Empty;
        }
        else return "Work";
    }
}

在Mapper配置中使用此ResourceTypeResolver后

var config = new MapperConfiguration(cfg =>
        {
        cfg.CreateMap<Resource, GanttResource>()
               .ForMember(dst => dst.TypeName, opt => opt.ResolveUsing<ResourceTypeResolver>()));
        }

这里我在ResolveUsing上下文中遇到错误，

错误19类型＆＃39; PMEasy.Web.AutoMapper.ResourceTypeResolver＆＃39;不能用作类型参数＆＃39; TValueResolver＆＃39;在泛型类型或方法中＆＃39; AutoMapper.IMemberConfigurationExpression.ResolveUsing（）＆＃39;。来自＆＃39; PMEasy.Web.AutoMapper.ResourceTypeResolver＆＃39;没有隐式参考转换。到AutoMapper.IValueResolver＆＃39;。 D：\ PMEasy \ Development \ PMEasyDev \ PMEasy.Web \ App_Start \ AutoMapperConfig.cs 58 59 PMEasy.Web

任何想法我们如何解决这个问题？

Answer 1

看起来，您创建了自己的界面IValueResolver<in TSource, in TDestination, TDestMember>，使用了自动播放器的界面。 Soo，删除你的界面定义。

AutoMapper IValueResolver抛出错误该类型不能用作类型参数＆＃39; TValueResolver＆＃39;在泛型类型或方法中

1 个答案: