Question

我是WPF / C＃编程的新手。我正在尝试使用此XAML代码将xml文件内容显示到列表框中：

<Window x:Class="test.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">
    <Window.Resources>
        <XmlDataProvider x:Key="HostsData"
                   Source="/Hosts.xml"
                   XPath="Hosts/Host" />
    </Window.Resources>
    <Grid>
        <ListBox Height="100" HorizontalAlignment="Left" Margin="98,70,0,0" Name="listBox1"
                 VerticalAlignment="Top" Width="120" SelectionChanged="listBox1_SelectionChanged"
                 ItemsSource="{Binding Source={StaticResource HostsData}}"
                 DisplayMemberPath="HostName"/>
    </Grid>
</Window>

Hosts.xml包含：

<Hosts>
  <Host>
    <IP>1.1.1.1</IP>
    <HostName>abc01</HostName>
  </Host>
  <Host>
    <IP>2.2.2.2</IP>
    <HostName>abc02</HostName>
  </Host>
</Hosts>

我成功构建但是当我运行应用程序时，列表框是空的！我已经在任何地方复制了Hosts.xml文件，但仍然没有。

请问好吗？

Answer 1

我认为您忘记指定数据上下文。

DataContext="{Binding Source={StaticResource HostsData}}

作为Grid xaml属性或Listbox。

由于数据来自XML提供程序，请尝试使用Xpath属性标记

编辑：

我发现发布完整的示例实现更相关，请忽略Blend特定的命名空间

<UserControl
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" x:Name="Screen_2_1_Name"
mc:Ignorable="d"
x:Class="WpfPrototype1Screens.Screen_2_1"
Width="640" Height="480">
<UserControl.Resources>
    <XmlDataProvider x:Key="uneDataSource" Source="http://www.lemonde.fr/rss/une.xml" d:IsDataSource="True"/>
</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="White" DataContext="{Binding Source={StaticResource uneDataSource}}">
    <ListBox Margin="80,88,64,112" Style="{DynamicResource ListBox-Sketch}" ItemsSource="{Binding XPath=/rss/channel/item/title}"/>
</Grid>

Answer 2

我试过这样......只是看看

<Window x:Class="WpfApplication2.Window4"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window4" Height="300" Width="300">
<Window.Resources>
    <XmlDataProvider x:Key="BookmarkData" XPath="Hosts/Host">
        <x:XData>
            <Hosts>
                <Host>
                    <IP>1.1.1.1</IP>
                    <HostName>abc01</HostName>
                </Host>
                <Host>
                    <IP>2.2.2.2</IP>
                    <HostName>abc02</HostName>
                </Host>
            </Hosts>
        </x:XData>
    </XmlDataProvider>
</Window.Resources>
  <Grid>
    <ListBox
           Background="#999"
           BorderThickness="2"
           BorderBrush="White" 
           Margin="10"
           DisplayMemberPath="HostName" 
           ItemsSource="{Binding Source={StaticResource BookmarkData}, XPath=/Hosts/Host}"
           />

</Grid>

将XML文件显示到ListBox中

2 个答案: