c# - How may I access the the signature pad points using MVVM pattern? -

using xamarin.forms signaturepad control within xamarin.forms project using mvvm pattern, how may bind or should bind to, allow me access signature points?

i have following:

view:

<?xml version="1.0" encoding="utf-8" ?> <contentpage xmlns="http://xamarin.com/schemas/2014/forms"              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"              xmlns:signature="clr-namespace:signaturepad.forms;assembly=signaturepad.forms"              xmlns:local="clr-namespace:app12.viewmodels;assembly=app12"              x:class="app12.views.signaturexamlview"              bindingcontext="{staticresource viewmodel}">      <contentpage.resources>         <resourcedictionary>             <local:signaturexamlviewmodel x:key="viewmodel"/>         </resourcedictionary>     </contentpage.resources>      <stacklayout>         <signature:signaturepadview x:name="padview"                                     heightrequest="135" widthrequest="600"                                     backgroundcolor="white"                                     captiontext="" captiontextcolor="black"                                     cleartext="clear signature" cleartextcolor="red"                                     prompttext="sign here" prompttextcolor="red"                                     signaturelinecolor="black" strokecolor="black" strokewidth="2"/>          <button text="get signature image"/>         <button text="save signature"                 command="{binding savesignaturecommand}"/>     </stacklayout> </contentpage> 

viewmodel:

using signaturepad.forms; using system.threading.tasks; using xamarin.forms;  namespace app12.viewmodels {     public class signaturexamlviewmodel : baseviewmodel     {         private point[] padviewpoints;         private signaturepadview signaturepadviewtemp;          public signaturexamlviewmodel()         {             signaturepadviewtemp = new signaturepadview();             savesignaturecommand = new command(async () => await savesignature());         }          async task savesignature()         {             var temp = padviewpoints;             var temparray = padviewpoints;          }          public point[] padviewpoints         {             { return padviewpoints; }             set             {                 padviewpoints = value;             }         }          public signaturepadview signaturepadviewtemp         {                         {                 return signaturepadviewtemp;             }             set             {                 signaturepadviewtemp = value;             }         }          public command savesignaturecommand { get; private set; }     } } 

the viewmodel code isn't being used. it's trial , error code i've been trying work.

wiki