Prism: Inject service in a parameterless constructor-CodePudding

I have three classes:

MyModel (pure POCO object)
MyModelWrapper (inherits from BindableBase)
MyViewModel (it also inherits from Bindable class)

The problem I have is that I need a paremeterless constructor in MyModelWrapper because I bind an object in MyViewModel which is an ObservableCollection<MyModelWrapper> to a Datagrid Itemssource, and if it has not a parameterless constructor, you are not able to insert new rows in it (it does not appear a blank line at the end of the Datagrid).

So, if I want the user can insert new rows I need a parameterless constructor (and I do want).

And here I have my problem: I need to inject a service in MyModelWrapper.

I can inject the service in the constructor:

IMyModelWrapperService Service;
public MyModelWrapper(IMyModelWrapperService Service)
{
    Service = service;
}

But this way the Datagrid does not let the user to insert new rows.

If I could get a reference to the container, I could do container.Resolve<IMyModelWrapper>(), but I think that I would need to inject the container via constructor too, so it is not a valid solution.

So, I would need something like:

[Inject]
IMyModelWrapperService Service;

But I think property injection does not work in Prism (at least I am not able to use it).

Which is the right approach to inject a service in a class that needs to be parameterless in Prism?

Thank you

CodePudding user response：

If you absolutely have to, you can access the container through Prism.Ioc.ContainerLocator.Container to get what you need.

Yes, this is evil and ugly, but if you need a dependency in a class whose construction you can't control, then this is your only option.

This is nearly a duplicate of this closed question.