Question

如果先前已经提出这个问题，我很抱歉，但我还没有找到解决方案。

使用标准的Northwind DataService，我有一个显示CustomerID的Combobox，从中我有一个成功链接到Listview，它显示与该CustomerID相关联的订单。但是我有第二个Listview，我想在Orders Listview中显示与SelectedItem相关联的Order_Details，这个ListView保持空白，这是一个错误，因为它应该包含所选订单的详细信息。我需要在'Loaded'上发生这些人群。

突出表详情如下：客户（CustomerID），订单（CustomerID，OrderID），Order_Details（OrderID）。

这是我的xaml代码：

<StackPanel>
    <Label Content="Customer ID" />        
    <ComboBox Name="customerIDComboBox" 
              DisplayMemberPath="CustomerID" 
              ItemsSource="{Binding}" 
              IsSynchronizedWithCurrentItem="True" 
              SelectedIndex="0" />        

    <ListView Name="ordersListView" 
              ItemsSource="{Binding Path=Orders}"  
              DisplayMemberPath="OrderID" 
              IsSynchronizedWithCurrentItem="True" 
              SelectedItem="0" >
        <ListView.View>
            <GridView>
                <GridViewColumn DisplayMemberBinding="{Binding Path=OrderID, Mode=OneWay}" 
                    Header="Order ID" Width="75"/>
                <GridViewColumn DisplayMemberBinding="{Binding Path=OrderDate, Mode=TwoWay}" 
                    Header="Order Date" Width="150"/>
                <GridViewColumn DisplayMemberBinding="{Binding Path=Freight, Mode=TwoWay}" 
                    Header="Freight Cost" Width="75"/>
            </GridView>
        </ListView.View>
    </ListView>

    <ListView Name="detailsListView" 
              ItemsSource="{Binding Path=Order_Details}"  
              DisplayMemberPath="OrderID" 
              IsSynchronizedWithCurrentItem="True" 
              SelectedItem="0" >
        <ListView.View>
            <GridView>
                <GridViewColumn DisplayMemberBinding="{Binding Path=OrderID, Mode=OneWay}" 
                    Header="Order ID" Width="75"/>
                <GridViewColumn DisplayMemberBinding="{Binding Path=ProductID, Mode=TwoWay}"
                    Header="Product ID" Width="75"/>
            </GridView>
        </ListView.View>
    </ListView>
</StackPanel>

有一些按钮，但它们与我的问题无关。

这是我的代码隐藏：

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    try
    {
        context = new NorthwindEntities(new Uri(svcUri));

        var customerQuery = from cust in context.Customers.Expand("Orders/Order_Details")
                            select cust;

        trackedCustomers = new DataServiceCollection<Customer>(customerQuery, 
                                                             TrackingMode.AutoChangeTracking,
                                                              "Customers",
                                                               OnPropertyChanged,
                                                               OnCollectionChanged);
        this.LayoutRoot.DataContext = trackedCustomers;
    }
    catch (DataServiceQueryException ex)
    {
        MessageBox.Show("The query could not be completed:\n" + ex.ToString());
    }
    catch (InvalidOperationException ex)
    {
        MessageBox.Show("The following error occurred:\n" + ex.ToString());
    }
}

Answer 1

回答我自己的问题我知道，但它关闭了它。

<ListView Name="detailsListView" 
          ItemsSource="{Binding Path=Order_Details}"  
          DisplayMemberPath="OrderID" 
          IsSynchronizedWithCurrentItem="True" 
          SelectedItem="0" >

应替换为：

<ListView Name="detailsListView" 
          ItemsSource="{Binding Path=Orders/Order_Details}"  
          DisplayMemberPath="OrderID" 
          IsSynchronizedWithCurrentItem="True" 
          SelectedItem="0" >

这导致组合框/列表框/列表框的正确填充。

WPF Combobox / Listview / Listview使用WCF DataService进行链接

1 个答案: