[英]InvalidOperationException in Asp.Net MVC while using In-Memory Cache
I need to apply In-Memory Cache
on my website with .NetFramework 4.5.2
but I get this exception: 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: 'Resolution of the dependency failed, type = 'Tranship.UI.Areas.Portal.Controllers.SearchResultController', name = '(none)'.
Unity.Exceptions.ResolutionFailedException:'解决依赖关系失败,类型='Tranship.UI.Areas.Portal.Controllers.SearchResultController',名称='(无)'。 Exception occurred while: while resolving.
发生以下异常:正在解决。 Exception is: InvalidOperationException - The current type, Microsoft.Extensions.Caching.Memory.IMemoryCache, is an interface and cannot be constructed.
异常是:InvalidOperationException-当前类型Microsoft.Extensions.Caching.Memory.IMemoryCache是一个接口,无法构造。 Are you missing a type mapping?
您是否缺少类型映射?
I am using Asp.net MVC (not Core) and using Microsoft.Extensions.Caching.Memory version 1.1.2
This is my cs file: 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;
}
}
}
You need to register IMemoryCache
to Unity
container 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);
To be able to use existing cache implementation based on .net 4.5.2 in .net core I've ported it to use System.Runtime caching instead of System Web. 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。 Works like a charm.
奇迹般有效。
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