c# - MVVM passing control handle to the model -

in model using external .dll file needs handle ui control in order display images on it. guess .dll related logic belongs model - not ui.

i have view. inside view i've got:

    <windowsformshost x:name="winformshost" horizontalalignment="stretch" verticalalignment="stretch" margin="5,0,5,0"/> 

now, in model need handle control placed in windowsfromshost. doing passing reference windows formshost viewmodel:

    //view     public mainwindow()     {         initializecomponent();         datacontext = new mainwindowviewmodel(this.winformshost);     } 

then in viewmodel, passing model:

    public mainwindowviewmodel (windowsformshost containerforrenderpanel)     {         model = new model (containerforrenderpanel);     }   

finally in model, creating new control , have access handle within model:

public class model : bindablebase {     private windowsformshost renderpanelcontainer;      public windowsformshost renderpanelcontainer     {         { return renderpanelcontainer; }         set { setproperty(ref renderpanelcontainer, value); }     }      public model(windowsformshost container)     {         renderpanelcontainer = container;         renderpanelcontainer.child = new system.windows.forms.panel();        } } 

i know approach violates mvvm pattern. how can pass handle view's control model?

create observable collection of object type panel. bind collection yours windowsformshost child element.