WPF XAML-將datagrid列綁定到外鍵（數據集）

Question

我正在開發一個與Access 2000數據庫對話的簡單WPF應用程序。 我過去使用過實體框架，但似乎我對Access數據庫有一定的限制。 我設法生成一個DataSet xsd文件，其中包含每個表的映射以及表之間的關系。 該架構如下所示：

為了將數據綁定到WPF數據網格，在通過各種表適配器填充數據后，我將DataContext設置為DataSet。 我使用以下C＃在后面的WPF代碼中實現此目的：

public partial class MainWindow : Window
{   
    private TillDataSet ds = new TillDataSet();
    private TransactionTableAdapter transactionDa = new TransactionTableAdapter();
    private DentistTableAdapter dentistDa = new DentistTableAdapter();
    private Transaction_TypeTableAdapter transactionTypeDa = new Transaction_TypeTableAdapter();
    private Payment_MethodTableAdapter paymentMethodDa = new Payment_MethodTableAdapter();

    public MainWindow()
    {
        InitializeComponent();
    }

    private void fillDataAdapters()
    {
        transactionDa.Fill(ds.Transaction);
        dentistDa.Fill(ds.Dentist);
        transactionTypeDa.Fill(ds.Transaction_Type);
        paymentMethodDa.Fill(ds.Payment_Method);
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        fillDataAdapters();
        this.DataContext = ds;
    }
}

我想顯示一個WPF數據網格，其中包含來自事務表的詳細信息。 我能夠從Transaction表中檢索基本詳細信息。 我要實現的是能夠導航表具有的關系，這樣我就可以顯示牙醫的姓名，而不是外鍵值。 我嘗試了以下XAML：

<!--Transaction List-->
<DataGrid Grid.Row="1" Grid.Column="1" Name="dtgTransactions" AutoGenerateColumns="False" IsReadOnly="True" Margin="10" ItemsSource="{Binding Transaction}">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Date" Binding="{Binding Trans_Date}" />
        <DataGridTextColumn Header="Type" Binding="{Binding Type}" />
        <DataGridTextColumn Header="Dentist" Binding="{Binding Dentist.Dentist_Name}"/>
        <DataGridTextColumn Header="Payment Method" Binding="{Binding Method}" />
    </DataGrid.Columns>
</DataGrid>

請注意“牙醫”列下的綁定。 嘗試此操作時，我得到一個空的數據列。 如何使用XAML導航關系？

Answer 1

這是工作示例的完整示例。 請對此進行編輯，以便我們查看問題出在哪里。

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel Orientation="Vertical" Loaded="StackPanel_Loaded" >
        <DataGrid Grid.Row="1" Grid.Column="1" Name="dtgTransactions" AutoGenerateColumns="False" IsReadOnly="True" Margin="10" ItemsSource="{Binding Transaction}">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Date" Binding="{Binding Trans_Date}" />
                <DataGridTextColumn Header="Type" Binding="{Binding Type}" />
                <DataGridTemplateColumn Header="Dentist">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <ItemsControl ItemsSource="{Binding Dentists}">
                                <ItemsControl.ItemTemplate>
                                    <DataTemplate>
                                        <StackPanel Orientation="Horizontal">
                                            <TextBlock Text="{Binding Dentist_Name}"/>
                                        </StackPanel>
                                    </DataTemplate>
                                </ItemsControl.ItemTemplate>
                            </ItemsControl>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>
        </DataGrid>
    </StackPanel>
</Window>

  using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Linq; using System.Text; using System.Threading.Tasks; namespace WpfApplication1 { public class ViewModel { public Transactions Transaction { get; set; } public ViewModel() { Transaction = new Transactions(); Transaction transData = new Transaction(); transData.ID = 0; transData.Trans_Date = DateTime.Now; transData.Type = "Type1"; Dentist dentistData = new Dentist(); dentistData.ID = 0; dentistData.Dentist_Name = "Dentist1 Name"; transData.Dentists.Add(dentistData); Transaction.Add(transData); transData = new Transaction(); transData.ID = 1; transData.Trans_Date = DateTime.Now; transData.Type = "Type2"; dentistData = new Dentist(); dentistData.ID = 1; dentistData.Dentist_Name = "Dentist2 Name"; transData.Dentists.Add(dentistData); dentistData = new Dentist(); dentistData.ID = 2; dentistData.Dentist_Name = "Dentist3 Name"; transData.Dentists.Add(dentistData); Transaction.Add(transData); } } public class Transactions : ObservableCollection<Transaction> { public ObservableCollection<Transaction> TransactionList { get; set; } public Transactions() { TransactionList = new ObservableCollection<Transaction>(); } } public class Transaction { public ObservableCollection<Dentist> Dentists { get; set; } public int ID { get; set; } public DateTime Trans_Date { get; set; } public string Type { get; set; } public Transaction() { Dentists = new ObservableCollection<Dentist>(); } } public class Dentist { public int ID { get; set; } public string Dentist_Name { get; set; } } } 

Answer 2

你的表有牙醫的名字，你與牙醫S結合

無論如何，嘗試一下；

<ItemsControl ItemsSource="{Binding Path=DataContext.Dentist,
 RelativeSource={RelativeSource AncestorType={x:Type Window}}}">

和;

<TextBlock Text="{Binding Dentist_Name}"/>