Saving values in memory using ASP.NET Core v2 [duplicate]

Question

Using Razorpage I have a 5 Select Boxes populated onPageLoad from SQL queries using C# Lists containing Key and Value

When saving the form I need to get hold of the key and values in these lists again

So to prevent more queries to SQL I would like to store the list (key, value pair) in memory on load so I can access it later using C#

how can I do that?

I am using ASP.NET Core v2 and C#

Thanks

Thomas

Are those values session based or the same for everyone? If they are the same for everyone you could save them in a MemoryCache cache item. — Raphael
– Raphael, Commented Dec 19, 2017 at 14:17

Raphael · Accepted Answer · 2017-12-19 14:34:15Z

2

You can use IMemoryCache

In your Startup.cs

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMemoryCache();
    }
}

In your controller

public class HomeController : Controller
{
    private IMemoryCache _cache;

    public HomeController(IMemoryCache memoryCache)
    {
        _cache = memoryCache;
    }
}

And then fetch it

 var cacheEntry = _cache.GetOrCreate("your-cache-key", entry =>
 {
    entry.SlidingExpiration = TimeSpan.FromMinutes(10);

    // return your key/value list;
    return new Dictionary<string,string>();
 }

See for more information In-memory caching in ASP.NET Core

answered Dec 19, 2017 at 14:34

Raphael

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