CODEWITHSUNDEEP
linqasp.net-mvc-4
JuChom
JuChom

Reputation: 5989

How to exclude one object type from a Linq query

For one on my unit test I am developping a linq query that retrieves all the controllers types from a MVC project and make sure it inherits from a BaseController.

var controllers = typeof(MvcApplication).Assembly.GetTypes().Where(typeof(IController).IsAssignableFrom);

How can I remove from this list the BaseController object? I have tried several things but it always remove from the list all the controllers that do not inherits from BaseController.

Here is the unit test

[Fact]
    public void All_Controllers_Inherit_From_BaseController()
    {
        var controllers = typeof(MvcApplication).Assembly.GetTypes().Where(typeof(IController).IsAssignableFrom);

        foreach (var controller in controllers)
        {
            Assert.True(controller.BaseType == typeof(BaseController));
        }
    }

Thanks!

Upvotes: 0

Views: 170

Answers (1)

Jon Skeet
Jon Skeet

Reputation: 1502296

Well, two options spring to mind:

  • Explicitly "remove" BaseController using Except:

    var controllers = typeof(MvcApplication).Assembly
                          .GetTypes()
                          .Except(new[] { typeof(BaseController) })
                          .Where(typeof(IController).IsAssignableFrom);

  • Only consider concrete types; I assume BaseController is abstract:

    var controllers = typeof(MvcApplication).Assembly
                          .GetTypes()
                          .Where(type => !type.IsAbstract)
                          .Where(typeof(IController).IsAssignableFrom);

Upvotes: 3

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