When using CSLA.net with MvvmCross, the separation of business logic is achieved by leveraging the strengths of both frameworks. CSLA.net is designed to encapsulate business logic within business objects, ensuring that validation rules, authorization checks, and data access logic are clearly separated from the presentation layer[2][3]. MvvmCross, on the other hand, provides a robust MVVM framework for managing the UI and application-level logic across multiple platforms[1].
Business Logic with CSLA.net
CSLA.net promotes a clear division of responsibilities by emphasizing the use of business objects that contain all business logic. These objects are designed using authentic object-oriented design concepts, focusing on behavior rather than just data containers[3]. This approach ensures that business rules are enforced uniformly throughout the application, making it easier to maintain and scale the application[2].
Integration with MvvmCross
MvvmCross is primarily concerned with the application and UI level, leaving the choice of business services and models open to the developer[1]. When integrating CSLA.net with MvvmCross, you can leverage CSLA's business objects as the model layer in the MVVM pattern. The ViewModel in MvvmCross can then consume these business objects to drive the UI state and handle user events.
Best Practices for Separation
1. Use CSLA Business Objects as Models: CSLA's business objects should be used as the model layer in the MVVM pattern. This ensures that business logic remains encapsulated within these objects.
2. Thin ViewModels: Keep ViewModels thin by focusing on UI-specific logic and state management. Avoid placing complex business logic within ViewModels, as this can lead to code duplication and inconsistencies[4][8].
3. ViewModelBase Inheritance: If necessary, inherit from CSLA's `ViewModelBase` to integrate CSLA's business objects with MvvmCross's ViewModel requirements. However, this should be done judiciously to maintain a clear separation of concerns[1][7].
4. Data Access Layer: Ensure that data access logic is separated from business logic. CSLA supports abstracting data access logic, which can be beneficial when integrating with MvvmCross[2][6].
By following these practices, you can effectively separate business logic from UI logic when using CSLA.net with MvvmCross, ensuring a maintainable and scalable cross-platform application architecture.
Citations:[1] https://stackoverflow.com/questions/17373587/how-well-would-mvvmcross-and-csla-net-work-together-in-a-multi-platform-strategy
[2] https://ironpdf.com/blog/net-help/csla-net/
[3] https://github.com/MarimerLLC/csla/blob/main/docs/What-is-CSLA-.NET.md
[4] https://www.reddit.com/r/androiddev/comments/13djgfv/business_logic_in_viewmodel_mvvm/
[5] https://blog.lhotka.net/2019/09/04/Uno-Platform-And-WebAssembly-With-Csla-v5
[6] https://marcduerst.com/2017/07/07/layer-architecture-separation-of-view-business-logic-and-physical-data-access/
[7] https://cslanet.com/old-forum/8575.html
[8] https://github.com/MarimerLLC/csla/discussions/1987