有谁知道为什么我的ListView与以下代码不起作用? 我用Snoop检查了它,并且ItemsSource看起来很好(当我启动Snoop时,ListView会显示MyViewModel.MyCollection,但是在使用Visual Studio进行调试时它没有显示任何内容吗?)
谢谢!
PS:MainWindow.xaml.cs具有DataContext = MainViewModel
<ListView Grid.Row="1" Margin="38,50,0,168" HorizontalAlignment="Left" Name="listViewSelectDate" Width="105"
ItemsSource="{Binding Path=MyViewModel.MyCollection}"
SelectedItem="{Binding SelectedDate}" IsSynchronizedWithCurrentItem="True">
<ListView.View>
<GridView>
<GridViewColumn Header="Date" DisplayMemberBinding="{Binding Path=CalcDate}"/>
</GridView>
</ListView.View>
</ListView>
ViewModel如下所示:
class MainViewModel : ViewModelBase
{
public SummaryViewModel MyViewModel
{
get { return _myViewModel; }
set { _myViewModel = value; RaisePropertyChanged("MyViewModel"); }
}
public MyDate SelectedDate
{
get { return _selectedDate; }
set { _selectedDate = value; RaisePropertyChanged("SelectedDate"); }
}
}
和
public class SummaryViewModel : ViewModelBase
{
public ObservableCollection<MyDate> MyCollection { get; set; }
}
和
public class MyDate
{
public DateTime CalcDate { get; set; }
}
答案 0 :(得分:1)
谁设置了MyCollection
?它不提供更改通知,因此绑定不知道它已被更改。改为:
private ObservableCollection<MyDate> _myCollection;
public ObservableCollection<MyDate> MyCollection
{
get { return _myCollection; }
set
{
_myCollection = value;
OnPropertyChanged("MyCollection");
}
}
或者,更好的是,将其设为只读:
private readonly ICollection<MyDate> _myCollection = new ObservableCollection<MyDate>();
public ICollection<MyDate> MyCollection
{
get { return _myCollection; }
}
答案 1 :(得分:0)
在Visual Studio输出窗口中查看,它将显示您可能获得的任何DataBinding错误,这可能有助于您解决问题。