c# - Open new View when new ViewModel is available? -


i relatively new wpf/mvvm. our current wpf project still prototype application, means haven't come designing of main layout. have designed reports (by reports, mean quite complicated usercontrol each of has configuration controls such comobboxor textbox, , datagrid, graph controls data want present) viewand viewmodel. still prototype, need open new window displays of these usercontrol. in future, might change locate different usercontrol in different regions inside main window, layout of visual studio. main point is, our application include hundred of such usercontrol or call reports. different previous working projects had static layout/mainview.

i still haven't figured out architecture it. our classic usage scenario let user select in menu report open, , have command (either in mainviewmodel, or in viewmodel of report) objects open new report. command generating new viewmodel (viewmodel first case) , corresponding view should generated (by whom?), , new window should opened including newly-generated usercontrol.

i guess need 2 services:

  1. a service subscribes new-viewmodel-generated event, , resolve usercontrol when such event happens.

  2. (for our current prototype application) window manager, subscribes new-usercontrol-generated event published 1) service, , opens new window display it.

and in future our actual application, can change 2) service , put them different regions. second, simple , temporary, can have 1 object in code-behind of mainview, subscribes event using eventaggregator, , generate new window. correct ?

can tell me how should achieve this?

data binding can handle you. in container want display reports add contentcontrol , bind property holds vm report want display currently.

<window>   <contentcontrol content="{binding path=currentreport}" /> </window>

to display different reports wrap each of usercontrols in own datatemplate can injected contentcontrol. resolve view have few choices. can create datatemplateselector map them or specify vm types on templates. in either case, make sure templates in scope @ contentcontrol (in resources in same file or parent, or merged standalone resourcedictionary).

<datatemplate datatype="{x:type viewmodels:firstreportviewmodel}">   <views:firstreportviewcontrol/> </datatemplate>

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