ContextData

ContextData is a dictionary to store data in the viewModel.

Warning

ContextData is different from Fields. Fields are used to store data that is displayed in the UI, while ContextData is used to store data that is not displayed in the UI.

Usage

You should use ContextData to store data that is not displayed in the UI. For example to store a reference to a SystemEnvironment.Window.

• You can store a reference an opened window in the ContextData.

ContextData["OpenPage"] = SystemEnvironment.Window.OpenUrl("https://documentation.neos.groupeisagri.com/", null, "width=768,height=768");

• Then you can access the opened window in the viewModel

var openPage = (SystemEnvironment.Window)ContextData["OpenPage"];
openPage.Close();