我需要使用.NetFramework 4.5.2在我的网站上应用Microsoft.Extensions.Caching.Memory version 1.1.2，但出现此异常：
Unity.Exceptions.ResolutionFailedException：'解决 依赖项失败，类型= 'Tranship.UI.Areas.Portal.Controllers.SearchResultController'，名称= '（没有）'。发生以下异常：正在解决。例外是： InvalidOperationException-当前类型， Microsoft.Extensions.Caching.Memory.IMemoryCache是一个接口， 无法构建。您是否缺少类型映射？
我正在使用Asp.net MVC（不是Core）并使用using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tranship.Business.Core;
using Tranship.Business.Interface;
using Tranship.DataAccess.UnitOfWork;
using Tranship.Domain.Context;
using Tranship.Domain.Model;
using Tranship.DomainService.Interface;
using Tranship.ViewModel.Model;
using Tranship.ViewModel.Mapper;
using Tranship.ViewModel.Parameter;
using Microsoft.Extensions.Caching.Memory;
namespace Tranship.DomainService.Core
{
public class ScheduleDomainService : IScheduleDomainService
{
private readonly IMemoryCache MemoryCache;
private readonly string key = "TranshipMemoryCache";
public BoundedContextUnitOfWork Context { get; set; }
public IScheduleBiz ScheduleBiz { get; set; }
public ScheduleDomainService(IMemoryCache memoryCache)
{
Context = new BoundedContextUnitOfWork(new BoundedContext());
ScheduleBiz = new ScheduleBiz(Context);
MemoryCache = memoryCache;
}
public List<ScheduleViewModel> GetScheduleBySearchParameter(SearchTripParameters parameters)
{
DateTime from;
DateTime to;
List<ScheduleViewModel> cacheObject = new List<ScheduleViewModel>();
if (!MemoryCache.TryGetValue(key, out cacheObject))
{
// Cache is empty or timespan has been terminated
cacheObject = ScheduleBiz.GetAll();
MemoryCache.Set(key, cacheObject, new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromHours(1)));
}
else
{
// Cache is full
cacheObject = MemoryCache.Get(key) as List<ScheduleViewModel>;
}
return cacheObject;
}
}
}
这是我的CS文件：
v-model答案 0 :(得分：6)
您需要将IMemoryCache注册到Unity容器
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Options;
UnityContainer container = new UnityContainer(); // your unity container
MemoryCacheOptions memoryCacheOptions = new MemoryCacheOptions
{
//config your cache here
};
MemoryCache memoryCache = new MemoryCache(Options.Create<MemoryCacheOptions>(memoryCacheOptions));
container.RegisterInstance<IMemoryCache>(memoryCache);
答案 1 :(得分：-1)
为了能够在.net核心中使用基于.net 4.5.2的现有缓存实现，我已将其移植为使用 System.Runtime缓存而不是System Web。就像魅力一样。