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访问项模板中的ListView

binding wpf-controls wpf

Frinavale · 技术社区 · 14 年前

我有一个itemsControl绑定到对象列表。我为itemscontrol设置了itemstemplate…在itemtemplate中,我有一个listview,我想将它绑定到另一个对象列表。

如何访问itemsControl.itemTemplate中的ListView,以便将其DataContext设置为第二个对象列表?

以下是我的一个例子:

                <ItemsControl x:Name="DealerShips" ItemsSource="{Binding}">
                    <ItemsControl.ItemTemplate>
                        <DataTemplate>
                            <Expander Header="{Binding Name}" Foreground="White">
                                <ListView x:Name="CarTypes" ItemsSource="{Binding}">
                                    <ListView.ItemTemplate>
                                        <CheckBox Content="{Binding Path=Name}" IsChecked="{Binding Path=InStock}"></CheckBox>
                                    </ListView.ItemTemplate>
                                </ListView>
                            </Expander>
                        </DataTemplate>
                    </ItemsControl.ItemTemplate>
                </ItemsControl>

在我的vb.net代码中,我可以引用我的“经销商”项控件,将DataContext设置为一个(经销商)对象列表。我不知道如何访问“cartypes”listview以便设置它的dataContext。

Public Class CarsWindow
    Private _listOfDealerShips As ObservableCollection(Of DealerShip)
    Private _listOfInventory As ObservableCollection(Of Car)

  Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded
        _listOfDealerShips = New ObservableCollection(Of DealerShip)
        listOfDealerShips.Add(New DealerShip("A"))
        listOfDealerShips.Add(New DealerShip("B"))
        listOfDealerShips.Add(New DealerShip("C"))

        _listOfInventory = New ObservableCollection(Of Cars)
        listOfDealerShips.Add(New Car("TypeX",True))
        listOfDealerShips.Add(New Car("TypeY",False))
        listOfDealerShips.Add(New Car("TypeZ",True))

        DealerShips.DataContext = _listOfDealerShips

        ' I cannot access CarTypes....
        'CarTypes.DataContext = listOfInventory 
  End Sub

  Private Class DealerShip
    Public Property Name As String
    Public Sub New
    End Sub
    Public Sub New(ByVal name As String)
      Me.Name = name
    End Sub
  End Class

  Private Class Car
    Public Property Name As String
    Public Property InStock As Boolean
    Public Sub New
    End Sub
    Public Sub New(ByVal name As String, ByVal isInStock As Boolean)
      Me.Name = name
      Me.InStock = isInStock 
    End Sub
  End Class
End Class

谢谢你的帮助!

-弗里尼

2 回复 | 直到 14 年前

ihatemash 14 年前

可以设置包含列表的ViewModel并将其公开,将Cars窗口的DataContext设置为ViewModel的实例(可能通过DI),然后在XAML中更改ListView,使其如下所示:

<ListView x:Name="CarTypes" ItemsSource="{Binding DataContext.ListOfInventory, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}">

Frinavale 14 年前

我最终创建了一个包含两个列表的类。这样地:

Public Class DealershipDetails
  Public Property ListOfDealerShips As ObservableCollection(Of DealerShip)
  Public Property ListOfInventory As ObservableCollection(Of Car)

  Public Sub New()
     ListOfDealerShips = New ObservableCollection(Of DealerShip)
     ListOfDealerShips.Add(New DealerShip("A"))
     ListOfDealerShips.Add(New DealerShip("B"))
     ListOfDealerShips.Add(New DealerShip("C"))

     ListOfInventory  = New ObservableCollection(Of Cars)
     ListOfInventory.Add(New Car("TypeX",True))
     ListOfInventory.Add(New Car("TypeY",False))
     ListOfInventory.Add(New Car("TypeZ",True))
  End Sub

End Class

这样,我可以将itemsControl绑定到经销商详细信息类的实例,并有选择地将itemsControl中的控件绑定到适当的列表。

虽然这种方法有效,但我最初的问题仍未得到解答。我不知道如何访问儿童控件。

-弗里尼