我正在学习WPF,开始使用这个MSDN教程。
我只是按照教程操作。当我完成了代码并尝试运行时,在XAML页面中出现了异常,提示:
“System.Windows.StaticResourceExtension”上的“提供值”引发了一个异常。行号“27”,行位置“55”。内部异常揭示该错误为“找不到名为‘personItemTemplate’的资源。资源名称区分大小写。”
下面是有问题的XAML代码。
<Page x:Class="ExpenseIt.ExpenseItHome"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="321" d:DesignWidth="532"
Title="ExpenseIt - Home">
<Grid Margin="10,0,10,10">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="230" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="Auto" />
<RowDefinition />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Label Grid.Column="1" Style="{StaticResource headerTextStyle}">View Expense Report</Label>
<!-- Resource List Label-->
<Border Grid.Column="1" Grid.Row="1" Style="{StaticResource listHeaderStyle}">
<Label VerticalAlignment="Center" Foreground="White" FontWeight="Bold">Names</Label>
</Border>
<!-- Resource List-->
<ListBox Name="peopleListBox" Grid.Column="1" Grid.Row="2"
ItemsSource="{Binding Source={StaticResource ExpenseDataSource}, XPath=Person}"
ItemTemplate="{StaticResource personItemTemplate}">
</ListBox>
<!-- View button -->
<Button Grid.Column="1" Grid.Row="3" Click="Button_Click" Style="{StaticResource buttonStyle}">View</Button>
<!-- Set Background Image-->
<Grid.Background>
<ImageBrush ImageSource="watermark.png" />
</Grid.Background>
<Grid.Resources>
<!-- Expense Report Data -->
<XmlDataProvider x:Key="ExpenseDataSource" XPath="Expenses">
<x:XData>
<Expenses xmlns="">
<Person Name="TommyVance" Department="Legal">
<Expense ExpenseType="Lunch" ExpenseAmount="50" />
<Expense ExpenseType="Transportation" ExpenseAmount="50" />
</Person>
<Person Name="PhilJackson" Department="Marketing">
<Expense ExpenseType="Document printing"
ExpenseAmount="50"/>
<Expense ExpenseType="Gift" ExpenseAmount="125" />
</Person>
<Person Name="PaulBriggs" Department="Engineering">
<Expense ExpenseType="Magazine subscription"
ExpenseAmount="50"/>
<Expense ExpenseType="New machine" ExpenseAmount="600" />
<Expense ExpenseType="Software" ExpenseAmount="500" />
</Person>
<Person Name="AlfredNobel" Department="Finance">
<Expense ExpenseType="Dinner" ExpenseAmount="100" />
</Person>
</Expenses>
</x:XData>
</XmlDataProvider>
<!-- Data Template to mention that Name should be fetched from the XMLDataProvider -->
<!-- Name item template -->
<DataTemplate x:Key="personItemTemplate">
<Label Content="{Binding XPath=@Name}"/>
</DataTemplate>
</Grid.Resources>
</Grid>
</Page>
我在Grid资源中拥有所需的模板,并将其添加为静态资源。但仍然会抛出数据模板不可用的异常。