How to pass Events from Model to ViewModel in WPF/C#? -

in class registered event external dll, raised when there changes on variables external code.

public class model {    ....    public void connect    {     ....     client.onnotification += (s, e) =>     {        this.onnotification(s,e);     }    } } 

and have viewmodel in want notified when event raised in class model.

public class viewmodel {   ...   // call method when event in class model raised   public void dosomething()   {   } } 

any ideas clean , easy way that?

thank you.

solution 1: pass in client viewmodel's constructor , let viewmodel subscribe onnotification() (pass in interface if available)

solution 2: make model implement inotifypropertychanged if you're using mvvm; pass in interface viewmodel's constructor , subscribe propertychanged.

if you're not using mvvm, can use same methodology adding custom clientnotification event model, pass in entire model viewmodels constructor, , subscribe event.

solution 3: use messaging system (aka message bus) such prism's event aggregator class or mvvm light's messenger class, or write own.

edit: here's example using mvvm light: (note: coding memory, not tested)

add using reference galasoft.mvvmlight.messaging;

create small message class containing properties need. can inherit mvvm light's messagebase class if want not necessary.

public class clientnotificationmessage : messagebase {     public string someproperty { get; set;}     public int anotherproperty { get; set;} } 

in model's event handler, send message by:

client.onnotification += (s, e) => {    var msg = new clientnotificationmessage() { ... };    messenger.default.send<clientnotificationmessage>(msg); } 

in viewmodel constructor, register receive messages by:

messenger.default.register<clientnotificationmessage>(this, msg =>  {     // handle incoming clientnotificationmessage     // if (msg.someproperty != ) ... });  

i'm sure there other additional solutions other ppl can add.