c# - source binding not working windows phone 7 -

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am showing list of movie panorama windows phone 7 app. on click on each movie showing movie details,cast. movie details , cast showing pivot control. movie details works fine when got show cast , doesnt work. have list of cast objects. , binding source listbox in cast pivot control , doesnt show data. please me. below classes have used. thank you

mainviewmodel.cs

public class mainviewmodel {     public observablecollection<itemviewmodel> movieitems { get; set; }   }

itemviewmodel.cs 

 public class itemviewmodel : inotifypropertychanged {       private string _title;      public string _title       {         { return _title; }          set         {             if (value != _title)             {                 _title = value;                 notifypropertychanged("title");             }         }     }         private observablecollection<cast> _cast;      public observablecollection<cast> _cast     {         { return _cast; }          set         {             if (value != _cast)             {                 _cast = value;                 notifypropertychanged("cast");             }         }     }   ..........  }

cast.cs

public class cast  {       public string name { get; set; }       public string imagesource { get; set; }         public cast(string _name, string _imagesource)       {         this.imagesource = _imagesource;         this.name = _name;       }  } each movie have list of cast objects

moviemodel.cs

                  app.model.movieitems.add(                    new itemviewmodel()                    {                        _title = data["title"].tostring(),                        _cast=casobs,                       ........                    }                    );

moviedetails.xaml

               <listbox name="listbox" margin="0,0,-12,0" itemssource="{binding _cast}">                 <listbox.itemtemplate>                     <datatemplate>                         <stackpanel margin="0,0,0,17" width="432" height="78">                             <canvas>                                 <textblock horizontalalignment="center"   verticalalignment="bottom" margin="120,5,60,3" text="{binding name}" textwrapping="wrap" fontsize="32" style="{staticresource phonetextnormalstyle}"/>                                 <image height="90" horizontalalignment="left" margin="12,10,0,0" name="image1" stretch="fill" verticalalignment="top" width="90" source="{binding imagesource}" />                             </canvas>                         </stackpanel>                     </datatemplate>                 </listbox.itemtemplate>             </listbox>

replace

notifypropertychanged("title");

to 

notifypropertychanged("_title");

and 

notifypropertychanged("cast");

to 

notifypropertychanged("_cast");

hope it's help.


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