ASP.NET Core 2: Injecting Services into Razor pages

cat2.pngInject all the things.

Injecting dependencies into Razor pages is a new feature in ASP.NET Core designed to help with testing and simplicity.

Are cat pictures funny? The article will help answer that age-old question using a service injected into a Razor page.

Step 1: Create a service and interface

public class FunnyCatManagerIFunnyCat
{
    public string AreCatsFunny => "Yes";
}
 
public interface IFunnyCat
{
    string AreCatsFunny { get;}
}

Step 2: Add the IFunnyCat interface to ASP.NET Core’s dependency injection. Edit the Startup.cs file and add this:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
         services.AddTransient(typeof(IFunnyCat), typeof(FunnyCatManager));

Step 3: Inject the IFunnyCat implementation into a Razor page

@inject IFunnyCat CatManager
Are Cats Funny? <b>@CatManager.AreCatsFunny</b>

The result looks like this:

cat.png

Cats are indeed funny

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