c# - 在 WPF 中的 XAML 中将数据从 XmlDataProvider 绑定到 ListBox 失败

Question

最近开始学习WPF。在学习绑定数据时，我创建了 alistbox并将数据从 a 绑定XmlDataProvider到它。这是代码XmlDataProvider：

<Grid.Resources>
......
<XmlDataProvider x:Key="ExpenseDataSource" XPath="Expenses">
    <x:XData>
        <Expenses xmlns="">
            <Person Name="Mike" Department="Legal">
                <Expense ExpenseType="Lunch" ExpenseAmount="50" />
                <Expense ExpenseType="Transportation" ExpenseAmount="50" />
            </Person>
            <Person Name="Lisa" Department="Marketing">
                <Expense ExpenseType="Document printing"
                         ExpenseAmount="50"/>
            <Expense ExpenseType="Gift" ExpenseAmount="125" />
            </Person>
            <Person Name="John" Department="Engineering">
                <Expense ExpenseType="Magazine subscription" 
                         ExpenseAmount="50"/>
                <Expense ExpenseType="New machine" ExpenseAmount="600" />
                <Expense ExpenseType="Software" ExpenseAmount="500" />
            </Person>
            <Person Name="Mary" Department="Finance">
                <Expense ExpenseType="Dinner" ExpenseAmount="100" />
            </Person>
        </Expenses>
    </x:XData>
</XmlDataProvider>
......
</Grid.Resources>

这是代码Listbox：

<Grid>
......
<ListBox Name="peopleListBox" Grid.Column="1" Grid.Row="2" 
         ItemsSource="{Binding Source={StaticResource ExpenseDataSource}, XPath=Person}">
<!-- Name item template -->
    <DataTemplate>
        <Label Content="{Binding XPath=@Name}"/>
    </DataTemplate>
</ListBox>
......
<Grid>

当我编译并运行代码时，ListBox它什么都不包含。我尝试从 MSDN 找到解决方案，但无法理解错误在哪里。

Answer 1

This should at the very least get you started. I would suggest starting off a little simpler and work your way to the more difficult solutions.

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApplication1"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.Resources>
            <XmlDataProvider x:Key="ExpenseDataSource" XPath="Expenses">
                <x:XData>
                    <Expenses xmlns="">
                        <Person Name="Mike" Department="Legal">
                            <Expense ExpenseType="Lunch" ExpenseAmount="50" />
                            <Expense ExpenseType="Transportation" ExpenseAmount="50" />
                        </Person>
                        <Person Name="Lisa" Department="Marketing">
                            <Expense ExpenseType="Document printing"
                         ExpenseAmount="50"/>
                            <Expense ExpenseType="Gift" ExpenseAmount="125" />
                        </Person>
                        <Person Name="John" Department="Engineering">
                            <Expense ExpenseType="Magazine subscription" 
                         ExpenseAmount="50"/>
                            <Expense ExpenseType="New machine" ExpenseAmount="600" />
                            <Expense ExpenseType="Software" ExpenseAmount="500" />
                        </Person>
                        <Person Name="Mary" Department="Finance">
                            <Expense ExpenseType="Dinner" ExpenseAmount="100" />
                        </Person>
                    </Expenses>
                </x:XData>
            </XmlDataProvider>
        </Grid.Resources>
        <ListBox Name="peopleListBox" Grid.Column="1" Grid.Row="2" 
         DataContext="{Binding Source={StaticResource ExpenseDataSource}}" ItemsSource="{Binding Name}"/>
    </Grid>
</Window>

I trimmed your Listbox to not have the label with the datatemplate (you could actually substitute the data template for a stack panel within the Listbox. I set the data context of your listbox to be the static resource and the itemssource to be Binding Name. It will currently display the word Expenses as an individual string.