Question

我的应用程序中有两个ListView。这是我的Model类

  public class SurveyDetailViewModel : INotifyPropertyChanged
{
    private int _RoomTypeId;
    private string _RoomType;

    public int RoomTypeId
    {
        get { return _RoomTypeId; }

        set
        {
            _RoomTypeId = value;
            NotifyPropertyChanged("RoomTypeId");
        }
    }

    public string RoomType
    {
        get { return _RoomType; }

        set
        {
            _RoomType = value;
            NotifyPropertyChanged("RoomType");
        }
    }

    public ObservableCollection<SurveyProductDetails> SurveyProductDetails { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;
    private void NotifyPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    } 
}


 public class SurveyProductDetails : INotifyPropertyChanged
{
    private Guid _RoomId;
    private int _ProductTypeId;
    private string _Title;
    private string _Color;
    private int _Quantity;
    private int _QuantityInstalled;
    private string _RoomDescription;
    private string _ProductDescription;
    private string _ProductSpecification;
    public Guid RoomId
    {
        get { return _RoomId; }

        set
        {
            _RoomId = value;
            NotifyPropertyChanged("RoomId");
        }
    }
    public int ProductTypeId
    {
        get { return _ProductTypeId; }
        set
        {
            _ProductTypeId = value;
            NotifyPropertyChanged("ProductTypeId");
        }
    }
    public string Title
    {
        get { return _Title; }
        set
        {
            _Title = value;
            NotifyPropertyChanged("Title");
        }
    }
    public string Color
    {
        get { return _Color; }
        set
        {
            _Color = value;
            NotifyPropertyChanged("Color");
        }
    }
    public string ProductSpecification
    {
        get { return _ProductSpecification; }

        set
        {
            _ProductSpecification = value;
            NotifyPropertyChanged("ProductSpecification");
        }
    }
    public string ProductDescription
    {
        get { return _ProductDescription; }

        set
        {
            _ProductDescription = value;
            NotifyPropertyChanged("ProductDescription");
        }
    }
    public int Quantity
    {
        get { return _Quantity; }

        set
        {
            _Quantity = value;
            NotifyPropertyChanged("Quantity");
        }
    }
    public int QuantityInstalled
    {
        get { return _QuantityInstalled; }

        set
        {
            _QuantityInstalled = value;
            NotifyPropertyChanged("QuantityInstalled");
        }
    }
    public string RoomDescription
    {
        get { return _RoomDescription; }

        set
        {
            _RoomDescription = value;
            NotifyPropertyChanged("RoomDescription");
        }
    }
   public event PropertyChangedEventHandler PropertyChanged;
    private void NotifyPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    } 
}

我有一个Observable Collection对象

 ObservableCollection<SurveyDetailViewModel> surveyDetail = new ObservableCollection<SurveyDetailViewModel>();

获取数据。我试图将外部ListView的ItemSource设置为surveyDetail

ItemsSource="{Binding surveyDetail}"

和内在的这样

ItemsSource="{Binding surveyDetail.SurveyProductDetails}"

我也试过这个内心的

ItemsSource="{Binding RelativeSource={RelativeSource TemplatedParent},Path=SurveyProductDetails}"

ItemsSource="{Binding RelativeSource={RelativeSource TemplatedParent},Path=surveyDetail.SurveyProductDetails}"

外部ListView工作正常，但内部ListView根本没有绑定。需要帮助我做错了。

Answer 1

假设页面绑定到viewmodel，您可以使用此绑定

ItemsSource="{Binding SurveyProductDetails}"

我会使SurveyProductDetails成为一个只读属性，确保在调用get时后备字段不为null。

Answer 2

当您创建一个绑定到ObservableCollection的ListBox时，该列表中的每个项都会被赋予一个datacontext，它是集合中的相应对象。在这种情况下，每个顶级ListBoxItem都绑定到SurveyDetailViewModel类型的对象。

因此，您的ItemsSource只需要：

surveyDetail可以省略。

如何在WinRT Metro应用程序中将ListView绑定到ListView中

2 个答案: