在包含相同区域的多个视图之间共享棱镜视图

Question

I am trying to achieve the following pattern where the ContentRegion can have either ModuleShellView or Module2ShellView loaded/Active at any moment in time.

Module2ShellView has no reference to View1 but cause View1 has been registered to Region1 it is loaded into the Module2ShellView when that view is loaded into the ContentRegion but I want both ModuleShellViews to share the same instance of View1.

I want to be able to switch between both ModuleShellViews

MainShell
--ContentRegion
----ModuleShellView
------Region1
--------View1
----Module2ShellView
------Region1
--------View1

Answer 1

Based on my understanding, you would want View1 instance to be available for both ModuleShellViews . One way to do this is to register View1 as Singleton in the Container so each time View1 is loaded, the container will return always the same instance.

You can find more related information of View Registration on the following Prism guide chapter:

• Managing Dependencies between Components

Another alternative to accomplish this scenario would be by decoupling View1 from the ContentRegion where Navigation is performed. Below is a possible View Tree design which keeps View1 away from unloading and loading:

MainShell:
* Region1
  - View1
* ContentRegion
  - ModuleShellView
  - Module2ShellView

I hope this helps.