c# - Ninject:获取服务在我的业务层不起作用

Question

我搜索了很多来解决这个问题，但没有解决方案，我是 DI 和 Ninject 的新手。

我的问题是我可以在 WebUi 层获得我的服务，但我无法在业务层获得我的服务。

此代码在我的 WebUi 中有效，但在我的业务层中无效:

public IValidator<T> GetValidator<T>(T entity)
{
    var d = kernel.Get<IValidator<T>>();
    return d;
}

我在业务层遇到这个错误:

Error activating IValidator{Type} No matching bindings are available, and the type is not self-bindable. Activation path: 1) Request for IValidator{Type}

Suggestions: 1) Ensure that you have defined a binding for IValidator{Type}. 2) If the binding was defined in a module, ensure that the module has been loaded into the kernel. 3) Ensure you have not accidentally created more than one kernel. 4) If you are using constructor arguments, ensure that the parameter name matches the constructors parameter name. 5) If you are using automatic module loading, ensure the search path and filters are correct.

这是我的代码:

我的界面:

public interface IValidationService
{
    ValidationState Validate<T>(T model);
}

我的具体类:

public class ValidationService : IValidationService
{
    private readonly IKernel kernel;
    public ValidationService(IKernel kernel)
    {
        this.kernel = kernel;
    }

    public ValidationState Validate<T>(T model)
    {
        var validator = kernel.Get<IValidator<T>>();
        if (validator == null) // or just return null?
            throw new Exception(string.Format("No validator found for type                 ({0})", model.GetType()));

        return validator.Validate(model);
    }

}

和我的绑定(bind):

kernel.Bind<IValidationService>().To<ValidationService>();

Answer 1

检查了很久，发现问题了。

我已经这样做了，我的问题消失了:

kernel.Bind<IValidationService>().To<ValidationService>()
            .WithConstructorArgument(typeof(IKernel));