InvalidOperationException in Asp.Net MVC while using In-Memory Cache

Question

I need to apply In-Memory Cache on my website with.NetFramework 4.5.2 but I get this exception:

Unity.Exceptions.ResolutionFailedException: 'Resolution of the dependency failed, type = 'Tranship.UI.Areas.Portal.Controllers.SearchResultController', name = '(none)'. Exception occurred while: while resolving. Exception is: InvalidOperationException - The current type, Microsoft.Extensions.Caching.Memory.IMemoryCache, is an interface and cannot be constructed. Are you missing a type mapping?

I am using Asp.net MVC (not Core) and using Microsoft.Extensions.Caching.Memory version 1.1.2 This is my cs file:

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;
        }
    }
}

Only a guess: Unity cannot resolve IMemoryCache. Maybe the registration for the implementation of ÌMemoryCache` is missing. — H.G. Sandhagen
– H.G. Sandhagen, Commented Dec 15, 2018 at 13:01
are you sure you added AddMemoryCache() on ConfigureServices at startup check this learn.microsoft.com/en-us/aspnet/core/performance/caching/… — Ahmed Ghoniem
– Ahmed Ghoniem, Commented Dec 15, 2018 at 13:13
@Ahmed Ghoniem AddMemoryCache() belongs to the .net Core. I am using Asp.Net MVC. — Sasan
– Sasan, Commented Dec 17, 2018 at 6:14
if I add container.RegisterType<IMemoryCache, MemoryCache>(); registration it says that MemoryCacheOptions registration is missing — mk_yo
– mk_yo, Commented Sep 24, 2019 at 10:17

Kahbazi · Accepted Answer · 2019-09-24 13:01:34Z

9

+50

You need to register IMemoryCache to Unity container

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);

answered Sep 24, 2019 at 13:01

Kahbazi

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mk_yo · Accepted Answer · 2019-09-24 12:19:52Z

-1

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. Works like a charm.

Here's official documentation

answered Sep 24, 2019 at 12:19

mk_yo

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