c# - ListView two way compiled binding (x:Bind) -

i want display several names, , want them editable. used observablecolection, , bind listview new x:bind feature.

here's xaml:

    <listview>         <listview itemssource="{x:bind viewmodel.players}">                 <listview.itemcontainerstyle>             <style targettype="listviewitem">                 <setter property="horizontalcontentalignment" value="stretch" />             </style>         </listview.itemcontainerstyle>          <listview.itemtemplate>             <datatemplate xmlns:model="using:flechette.model"  x:datatype="model:player">                 <textbox text="{x:bind name, mode=twoway}" />             </datatemplate>         </listview.itemtemplate>     </listview> 

and code behind:

public sealed partial class gamesettingspage : page {     viewmodel.gamesettingsviewmodel viewmodel { get; set; }      public gamesettingspage()     {         initializecomponent();         datacontextchanged += (s, e) => viewmodel = datacontext viewmodel.gamesettingsviewmodel;     } } 

the problem twoway binding failed compile, error cs1061 'weakreference' not contain definition 'lostfocus' , no extension method 'lostfocus' accepting first argument of type 'weakreference' found (are missing using directive or assembly reference?)

how can fix ?

this seems problem in preview version of windows 10 sdk. given following code:

mainpage.xaml:

     <listview x:name="players">         <listview.itemcontainerstyle>             <style targettype="listviewitem">                 <setter property="horizontalcontentalignment" value="stretch" />             </style>         </listview.itemcontainerstyle>          <listview.itemtemplate>             <datatemplate x:datatype="local:player">                 <textbox text="{x:bind name, mode=twoway}" />             </datatemplate>         </listview.itemtemplate>     </listview> 

mainpage.xaml.cs:

    private observablecollection<player> players = new observablecollection<player>();     public mainpage()     {         this.initializecomponent();     }      protected override void onnavigatedto(navigationeventargs e)     {         this.players.add(new player());         this.players.add(new player());         this.players.add(new player());         this.players.add(new player());         this.players.add(new player());          this.players.itemssource = players;     } 

player.cs:

public class player : inotifypropertychanged {     private string name;      public string name     {         { return name; }         set         {             if (value == name) return;             name = value;             onpropertychanged();         }     }      public event propertychangedeventhandler propertychanged;      [notifypropertychangedinvocator]     protected virtual void onpropertychanged([callermembername] string propertyname = null)     {         propertychanged?.invoke(this, new propertychangedeventargs(propertyname));     } } 

the compilation , app works , provides expected behavior: