I'm a bit new to MVVM, but here's my dilemma:
- I have a model (or models, but let's keep it simple)
- I want to show that model data on multiple different views.
- Ok, so ViewModel for each view gets created
- UserControls get created (my views)
- each Usercontrol gets a ViewModel
Here's my question: What/where/how do I handle propagating this model to each viewmodel?
This is desktop dev, not web dev, so I'm getting stuck on the idea of making sure that the model is in each viewmodel. Normally I handle this by having a controller/parent class propagate down the information to each ViewModel, but I'm starting to get into a more complex application where it's not one model that I need to propagate, but multiple models and viewmodels that might need to call services that would need that info as well, and I'm getting a bit confused as to how exactly the best practice is to proceed.
Just to be thorough, here's a quick example:
View1, View2, View3, and View4 all exist.
View1 and View2 need models M1, M2, and M3 View3 needs models M1, M3, and M4 View4 needs models M2, M3, M4, and M5
Each view now has it's own corresponding ViewModel, VM1-4.
How do I create and propagate M1-5 to the corresponding VMs?