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[英]ASP.NET Core Converting In-Memory Cache with IMemoryCache to Redis
[英]InvalidOperationException in Asp.Net MVC while using In-Memory Cache
我需要使用.NetFramework 4.5.2
在我的网站上应用In-Memory Cache
,但出现此异常:
Unity.Exceptions.ResolutionFailedException:'解决依赖关系失败,类型='Tranship.UI.Areas.Portal.Controllers.SearchResultController',名称='(无)'。 发生以下异常:正在解决。 异常是:InvalidOperationException-当前类型Microsoft.Extensions.Caching.Memory.IMemoryCache是一个接口,无法构造。 您是否缺少类型映射?
我正在使用Asp.net MVC(不是Core)并使用Microsoft.Extensions.Caching.Memory version 1.1.2
这是我的CS文件:
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;
}
}
}
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);
为了能够在.net核心中使用基于.net 4.5.2的现有缓存实现,我将其移植为使用System.Runtime缓存而不是System Web。 奇迹般有效。
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