無法使用來自azure的數據填充列表框

Question

我從azure移動服務提取數據，但是當我將數據填充到longlistselector時，它會拋出nullreference異常。

private MobileServiceCollection<users, users> items; 
private IMobileServiceTable<users> user = 
     App.MobileService.GetTable<users>(); 
items = await user 
      .Where(users => users.age == 20).ToCollectionAsync(); 
foreach (users usr in items.Cast<users>()) 
     { 
      listui.ItemsSource.Add(usr.age); 
     } 
listui.ItemsSource.Add(items.Cast<users>()); 

我甚至想直接填充傳遞項目，而不投對象longlistselector，但它只是給「users.age」的項目。但是項目的數量是正確的。

listui.ItemsSource = items 

XAML

<phone:LongListSelector x:Name="listui" HorizontalAlignment="Left" Height="151" VerticalAlignment="Top" Width="363" Margin="52,386,0,0" Background="#FF787878"/> 

幫助！

Answer 1

您需要設置的DataTemplate和綁定，試試這個，

<phone:LongListSelector Name="listui" HorizontalAlignment="Left" VerticalAlignment="Top" LayoutMode="List" IsGroupingEnabled="False" Width="446"> 
<phone:LongListSelector.ItemTemplate> 
<DataTemplate> 
<StackPanel> 
<TextBlock Text="{Binding age}" /> 
</StackPanel> 
</DataTemplate> 
</phone:LongListSelector.ItemTemplate> 
</phone:LongListSelector>