Question

我的应用程序中有一个数据网格。在这个网格中，我有两个datagridcombobox列。一切都按预期工作，我唯一的努力是将第二个组合框的itemssource设置为第一个组合框的选定值，以获得对给定值的属性的访问权。

<UserControl.Resources>
    <CollectionViewSource x:Key="itemcategoriesViewSource" d:DesignSource="{d:DesignInstance {x:Type local:itemcategories}, CreateList=True}"/>
    <CollectionViewSource x:Key="maincategoriesViewSource" d:DesignSource="{d:DesignInstance {x:Type local:maincategories}, CreateList=True}"/>
</UserControl.Resources>
<Grid DataContext="{StaticResource itemcategoriesViewSource}">
    <DataGrid x:Name="itemcategoriesDataGrid" RowDetailsVisibilityMode="VisibleWhenSelected" ItemsSource="{Binding Source={StaticResource itemcategoriesViewSource}}" EnableRowVirtualization="True" AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn x:Name="nameColumn" Width="*" Header="name" Binding="{Binding name}"/>
            <DataGridTextColumn x:Name="alternative_nameColumn" Width="Auto" Header="alternative name" Binding="{Binding alternative_name}"/>
            <DataGridTextColumn x:Name="alternative_name2Column" Width="Auto" Header="alternative name 2" Binding="{Binding alternative_name2}"/>
            <DataGridComboBoxColumn x:Name="maincategories_nameColumn" Width="Auto" Header="Main Category" ItemsSource="{Binding Source={StaticResource maincategoriesViewSource}}" DisplayMemberPath="name" SelectedItemBinding="{Binding subcategories.maincategories}"/>
            <DataGridComboBoxColumn x:Name="subcategories_nameColumn" Width="Auto" Header="Sub Category" DisplayMemberPath="name" SelectedItemBinding="{Binding subcategories}">
                <DataGridComboBoxColumn.EditingElementStyle>
                    <Style TargetType="ComboBox">
                        <Setter Property="ItemsSource" Value="ItemsSource/subcategories, ElementName="maincategories_nameColumn"/>
                    </Style>
                </DataGridComboBoxColumn.EditingElementStyle>
                <DataGridComboBoxColumn.ElementStyle>
                    <Style TargetType="ComboBox">
                        <Setter Property="ItemsSource" Value="ItemsSource/subcategories, ElementName="maincategories_nameColumn"/>
                    </Style>
                </DataGridComboBoxColumn.ElementStyle>
            </DataGridComboBoxColumn>
        </DataGrid.Columns>
    </DataGrid>
</Grid>

代码背后：

public partial class MainWindow : Window
{
    TestEntities _context = new TestEntities();

    public MainWindow()
    {
        InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {

        System.Windows.Data.CollectionViewSource maincategoriesViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("maincategoriesViewSource")));
        System.Windows.Data.CollectionViewSource itemcategoriesViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("itemcategoriesViewSource")));
        // Load data by setting the CollectionViewSource.Source property:
        this._context.maincategories.ToList();
        this._context.itemcategories.ToList();
        maincategoriesViewSource.Source = this._context.maincategories.Local;
        itemcategoriesViewSource.Source = this._context.itemcategories.Local;
    }
}

数据库设置图片：http://i.stack.imgur.com/xIgO9.png - ＆gt;我不允许加入它。

这个想法很简单。我想显示itemcategories中所有值的列表（这就是我在网格中使用它作为datacontext的原因），在另一列中我想显示一个带有主要类别的下拉列表（选中的值是绑定的）到/ itemcategories / subcategories / maincategory_id），棘手的部分是根据选定的maincategory显示带有子类别的列。

WPF Datagridcomboboxcolumn绑定到行值

0 个答案: