Ninject - binding constructors with arguments / Entity Framework connection string

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天涯浪人
天涯浪人 2021-02-18 16:28

Please forgive my ignorance, but I am very new to IOC and NinJect. I have searched for high and low for easily understandable solutions but so far they have eluded me.

S

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  •  陌清茗
    陌清茗 (楼主)
    2021-02-18 17:13

    Newer versions of Ninject allow to get rid of magic strings in the binding definition. Something like this:

    public class StandardModule : NinjectModule
    {
        public override void Load()
        {
            string connectionString = "...";
            Bind new MyEntityFrameWorkRepository(connectionString);
        }
    }
    

    For bindings involving generic types (e.g. bind ISomeService to SomeService and binding should be performed for all possible types at once), ToConstructor cannot be used (a new expression is required), so WithConstructorArgument remains the simplest approach. E.g.:

    Bind(typeof(ISomeService<>))
        .To(typeof(SomeService<>))
        .WithConstructorArgument("someParam", "someValue");
    

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