wpf - How to access ShowMessageAsync method of MetroWindow from ViewModel -


i using mahapps.metro wpf library mvvm. have viewmodel need display dialog. metrowindow has showmessageasync. proper way access viewmodel? understand need view instance passing viewmodel doesn't seem approach.

use following approach:

  1. take action<t> showmessageasync in viewmodel binding window.

  2. now create behaviour window , use following code in behaviour

    protected override void onattached() {     base.onattached();     this.associatedobject.loaded += associatedobject_loaded; }  void associatedobject_loaded(object sender, routedeventargs e) {     if (this.associatedobject.datacontext windowviewmodel)     {         windowviewmodel vm = this.associatedobject.datacontext windowviewmodel;          vm.showmessageasync = onshowmessageasync;     } }  private void onshowmessageasync(t param) {           //write logic call showmessageasync method. }

now in way, viewmodel of mainwindow have ability open child window.


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