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c#asp.net-mvcasp.net-core.net-core
lacoder
lacoder

Reputation: 1323

How to get Request.Scheme property outside of the controller . .(Net Core 2.2)

Whilst attempting to generate urls from outside of my controller , I'm unable to get at Request.Scheme. In the controller i can do this to generate a url without problems:

   //get UserManager bits
    var callBackUrl = Url.CallBackExtensionLink(user.Id, token, Request.Scheme);

CallBackExtensionLink() is an IUrlHelper extension method that i created. However,Request.Scheme throws a null reference exception.
How can I get the value outside of the controller ?

Upvotes: 0

Views: 737

Answers (1)

lacoder
lacoder

Reputation: 1323

So after some more investigating I was able to mitigate this problem by injecting IUrlHelper into the DI in .net core which is done differently to how others are done.

add this to the DI :

services.AddSingleton<IActionContextAccessor, ActionContextAccessor>();
            services.AddScoped<IUrlHelper>(x => {
                var actionContext = x.GetRequiredService<IActionContextAccessor>().ActionContext;
                var factory = x.GetRequiredService<IUrlHelperFactory>();
                return factory.GetUrlHelper(actionContext);
            });

And then pass IUrlHelper into the implementing class constructor.

private readonly IUrlHelper helper;

    YourConstructor(IUrlHelper helper){
    
    this.helper = helper;
    }

Upvotes: 1

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