Question

We are working with mono droid and mvvmcross and sometimes when the app is initializing we experience a exception- Cirrious.MvvmCross.Exceptions.MvxException: Unable to Resolve IoC type.
It happens when we do a call to GetService() –

public IImageService ImageService
        {
            get
            {
                if (_imageService == null)
                {
                    _imageService = this.GetService<IImageService>();

                }
                return _imageService;
            }
        }

It seems that it cannot resolve IImageService – Do you guys have any ideas what can cause this and to avoid it?

Regards

Answer 1

The exception ‘Cirrious.MvvmCross.Exceptions.MvxException: Unable to Resolve IoC type.’ suggests that the IImageService implementation cannot be found in the IoC container.

This normally suggests that an implementation for the interface hasn’t been registered with the IoC framework before the call to GetService<>.

Some questions that might help work out why this is happening:

• How are you registering IImageService as with the IoC? Is it definitely always registered before the GetService<> call is made?
• If this occurs ‘sometimes’, then is there any pattern to when those times occur? I’d normally expect this sort of code to either always work or always fail – for it to fail ‘sometimes’ suggests maybe some sort of async timing issue?