Question

I have the weirdest problem - just started using MemoryCache and thought it would be pretty straightforward... turns out it isn't. This is a completely empty ASP.NET MVC5 application, hosted on my local IIS 7.5

On the first request the value should have been added to the cache - so if I refresh the page, the cache should hold the value.

When I debug the application, the breakpoint (on my commented line) gets hit twice: on first request, on second request. After that the cached value can be used.

Why does the cache not return the value on the first reload as expected?

public class Temp
{
    public int Age { get; set; }
}

public class HomeController : Controller
{
    public ActionResult Index()
    {
        var temp = (Temp)MemoryCache.Default.Get("MyVal");

        if (temp == null)
        {
            // THIS GETS HIT ON THE FIRST TWO REQUESTS, AFTER THAT THE CACHE RETURNS THE VALUE
            temp = new Temp { Age = -127 };
            MemoryCache.Default.Add("MyVal", temp, DateTime.UtcNow.AddMinutes(10));
        }


        return View();
    }
}

Answer 1

我认为你不需要在MVC应用程序中使用MemoryCache。它需要一些自定义实现才能使其正常工作。为什么不使用 HttpContext.Cache 呢？它使用起来非常简单，可以根据自己的喜好进行配置 - 网上有很多教程。（我刚刚做了一个小教程，如果你开始有困难，可以check it out）

MemoryCache.Default invalidated after first Request

1 个答案: