fix lst view bug

ClientListShared/ClientListShared/Db.cs

@@ -28,7 +28,7 @@ namespace ClientList
         MobileServiceClient client;
        
         IMobileServiceSyncTable<Client> todoTable;
-        public static string ClientUrl {get{throw new NotImplementedException();}}
+        public static string ClientUrl {get{ throw new NotImplementedException(); }}
         public static ObservableCollection<Client> Clients { get; set; } = new ObservableCollection<Client>() { };
         private Db()
         {

ClientListShared/ClientListShared/MainPage.xaml

@@ -4,5 +4,4 @@
              xmlns:local="clr-namespace:ClientList"
              x:Class="ClientList.MainPage">
 	<ListView x:Name="lstView"></ListView>
-	
 </ContentPage>

ClientListShared/ClientListShared/MainPage.xaml.cs

@@ -46,10 +46,15 @@ namespace ClientList
             this.lstView.ItemSelected += (item, d) =>
             {
                 var idt = (ListView)item;
+                if(idt.SelectedItem == null) return;
                 this.Navigation.PushAsync(new NewClient((Client)idt.SelectedItem));
             };
-            Db.DefaultManager.GetClientsAsync(true);
+        Db.DefaultManager.GetClientsAsync(true);
         }
-        
+        protected override void OnAppearing()
+        {
+            this.lstView.SelectedItem = null;
+        }
+
     }
 }