Custom RouteContraint with IOptions

Question

Is there a way to pass IOptions into a custom IRouteConstraint? I'm trying to check an appsetting to see if I need to have a certain route or not.

score 1 · Accepted Answer · answered Oct 13 '16 at 00:35

1

Can't find any references in the moment, but

either it works when you pass it in the constructor (I assume you tried it and it didn't work)
get it from the HttpContext, which is passed to the Match method

Example:

public class MyConstraint : IRouteConstraint
{
    public bool Match(HttpContext httpContext, IRouter route, string routeKey, RouteValueDictionary values, RouteDirection routeDirection)
    {
        var options = httpContext.RequestServices.GetService<IOptions<MySettings>>();

        return ...;
    }
}

answered Oct 13 '16 at 00:35

Tseng

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I did try it in the constructor. I'll try grabbing it from the httpContext. Thanks! – Jason N. Gaylord Oct 13 '16 at 00:35
Doesn't seem to be working. I can't specify the type. Still looking. – Jason N. Gaylord Oct 13 '16 at 00:43
Got it. Here's what I did: `... var options = httpContext.RequestServices.GetService(typeof(IOptions)); ...` – Jason N. Gaylord Oct 13 '16 at 00:45
I prefer the generic versions where possible. For it you need to add a `using Microsoft.Extensions.DependencyInjection;` to make the generic extension methods available – Tseng Oct 13 '16 at 10:05

Custom RouteContraint with IOptions

1 Answers1