c# - Prism 6: Multiple Views get data from one ViewModel -

so im working week prism , it´s great :) question now: can data 1 viewmodel multiple views (in cases 2 views). work viewmodellocator brian lagunas in webinar -> https://www.youtube.com/watch?v=zfby2nfykqy

the example webinar: have views named viewa + viewb , viewmodels named viewaviewmodel + viewbviewmodel. want locator take viewaviewmodel both viewa , viewb.

code viewa:

<usercontrol x:class="mvvm_prism_mein_einfaches_beispiel.views.viewa"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"               xmlns:local="clr-namespace:mvvm_prism_mein_einfaches_beispiel.views"              xmlns:prism="http://prismlibrary.com/"              prism:viewmodellocator.autowireviewmodel="true"              mc:ignorable="d"               d:designheight="300" d:designwidth="300">     <grid>         <label x:name="lbl_firstname" content="firstname:" horizontalalignment="left" margin="61,38,0,0" verticalalignment="top"/>         <textbox x:name="tb_firstname" horizontalalignment="left" height="23" margin="129,38,0,0" textwrapping="wrap" text="{binding firstname, updatesourcetrigger=propertychanged}" verticalalignment="top" width="120"/>         <label x:name="lbl_lastname" content="lastname:" horizontalalignment="left" margin="61,70,0,0" verticalalignment="top"/>         <textbox x:name="tb_lastname" horizontalalignment="left" height="23" margin="129,70,0,0" textwrapping="wrap" text="{binding lastname, updatesourcetrigger=propertychanged}" verticalalignment="top" width="120"/>         <label x:name="lbl_updated" content="updated:" horizontalalignment="left" margin="61,102,0,0" verticalalignment="top"/>         <textblock x:name="txb_update" horizontalalignment="left" margin="129,107,0,0" textwrapping="wrap" text="{binding lastupdated}" verticalalignment="top"/>         <button x:name="btn_update" content="update" horizontalalignment="left" margin="129,141,0,0" verticalalignment="top" width="75" command="{binding updatecommand}"/>         <button x:name="btn_upview" content="update + view" horizontalalignment="left" margin="129,171,0,0" verticalalignment="top" width="75" command="{binding navigatecommand}" commandparameter="viewtablet"/>     </grid> </usercontrol> 

viewaviewmodel:

using mvvm_prism_mein_einfaches_beispiel.events; using prism.commands; using prism.events; using prism.mvvm; using prism.regions; using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks; using system.windows.input;  namespace mvvm_prism_mein_einfaches_beispiel.viewmodels {     public class viewaviewmodel : bindablebase     {         private string _firstname = "brian";         public string firstname         {             { return _firstname; }             set { setproperty(ref _firstname, value); }         }          private string _lastname;         public string lastname         {             { return _lastname; }             set { setproperty(ref _lastname, value); }         }          private datetime? _testupdate;         public datetime? testupdate         {             { return _testupdate; }             set { setproperty(ref _testupdate, value); }         }          public icommand updatecommand { get; set; }         private ieventaggregator _eventaggregator;          public viewaviewmodel(ieventaggregator eventaggregator, iregionmanager regionmanager)         {             _eventaggregator = eventaggregator;             updatecommand = new delegatecommand(execute, canexecute).observesproperty(() => firstname).observesproperty(() => lastname);              _regionmanager = regionmanager;             navigatecommand = new delegatecommand<string>(navigate);         }          private iregionmanager _regionmanager;          public delegatecommand<string> navigatecommand { get; set; }          private void navigate(string view)         {             _regionmanager.requestnavigate("contentregion", view);         }          private bool canexecute()         {             return !string.isnullorwhitespace(firstname) && !string.isnullorwhitespace(lastname);         }          private void execute()         {             lastupdated = datetime.now;              _eventaggregator.getevent<updateevent>().publish(lastupdated.tostring());         }     } } 

viewb should viewa.

thx help. best regards shazzar

as long you're not talking same instance, can done. have register viewmodel view in viewmodellocationprovider.

viewmodellocationprovider.register<viewb, viewaviewmodel>(); 

*note, specific method new feature in latest preview. otherwise, have provide factory instead.