TreeView 未从 XML 填充
TreeView not filling from XML
我已经准备好接受虐待了。我不明白为什么这不起作用。
这是相关的 XAML:
<Window.Resources>
<XmlDataProvider x:Key="Family" Source="TestArmy1.xml" XPath="/Army"/>
</Window.Resources>
// 截图
<TreeView Name="OOB" Height="880" Background="#00000000"
BorderBrush="#00000000" Padding="100,1,1,50" UseLayoutRounding="False"
MouseRightButtonDown="TreeViewPreviewRightButtonDown" DataContext="{StaticResource Family}" ItemsSource="{Binding XPath=Commander}" FontSize="12" />
这是 C# 代码：
//This is for dynamically building a treeview with templates from an XML file
XmlTextReader xmlReader1 = new XmlTextReader("HierarchicalDataTemplate1.xml");
HierarchicalDataTemplate hierarchicalDataTemplate1 = XamlReader.Load(xmlReader1) as HierarchicalDataTemplate;
XmlTextReader xmlReader2 = new XmlTextReader("HierarchicalDataTemplate2.xml");
HierarchicalDataTemplate hierarchicalDataTemplate2 = XamlReader.Load(xmlReader2) as HierarchicalDataTemplate;
hierarchicalDataTemplate1.ItemTemplate = hierarchicalDataTemplate2;
XmlTextReader xmlReader3 = new XmlTextReader("HierarchicalDataTemplate3.xml");
HierarchicalDataTemplate hierarchicalDataTemplate3 = XamlReader.Load(xmlReader3) as HierarchicalDataTemplate;
hierarchicalDataTemplate2.ItemTemplate = hierarchicalDataTemplate3;
OOB.ItemTemplate = hierarchicalDataTemplate1;
Thread updateThread = new Thread(new ParameterizedThreadStart(UpdateTree));
updateThread.Start(this);
以及构建 TreeView 的代码：
private void UpdateTree(object obj)
{
if (File.Exists("TestArmy1.xml") == false)
{
MessageBox.Show("Unable to open\nTestArmy1.xml");
return;
}
MainWindow window = (MainWindow)obj;
window.Dispatcher.Invoke(DispatcherPriority.Send, new Action(RebuildTree));
}
private void RebuildTree()
{
XmlDataProvider provider = new XmlDataProvider();
XmlDocument xmlFile = new XmlDocument();
xmlFile.Load("TestArmy1.xml");
provider.Document = xmlFile;
provider.XPath = "/Army";
OOB.DataContext = provider;
XmlNode node = xmlFile.DocumentElement.SelectSingleNode("ArmyName");
ArmyNameString = node.InnerText;
ArmyNameTitle.Content = ArmyNameString;
}
这是已加载的 XML 文件 TestArmy1.xml（现已精简）：
<?xml version="1.0" encoding="UTF-8"?>
<Army>
<ArmyName>The Army of Northern Virginia</ArmyName>
<Commander>
<CommanderName>The Emperor With the Very Long Name!</CommanderName>
<CommanderLeadership>94</CommanderLeadership>
<Division>
<DivisionCommanderName>Major General William T. Sherman</DivisionCommanderName>
<DivisionCommanderLeadership>78</DivisionCommanderLeadership>
<Unit>
<UnitName>'Chasseurs à Cheval Garde"</UnitName>
<UnitType>Cavalry</UnitType>
<UnitKStrength>3</UnitKStrength>
<UnitStrength>456</UnitStrength>
<UnitQuality>10</UnitQuality>
<UnitMorale>7</UnitMorale>
<UnitLeadership>7</UnitLeadership>
<UnitAmmunition>99</UnitAmmunition>
</Unit>
</Division>
<Division>
<DivisionCommanderName>Marshal Ney</DivisionCommanderName>
<DivisionCommanderLeadership>8</DivisionCommanderLeadership>
</Division>
</Commander>
</Army>
这是 HierarchicalDataTemplate1：
<HierarchicalDataTemplate
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
ItemsSource="{Binding XPath=Commander}"
>
<Grid Height="62" Width="auto">
<Grid Height="61" HorizontalAlignment="Left" Margin="0,0,0,0" Name="grid1" VerticalAlignment="Top" Width="auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Image Source= "HeadQuarters.png" Grid.Column="1" Grid.RowSpan="2" HorizontalAlignment="Center" Stretch="None" OpacityMask="White"></Image>
<Label Content="{Binding XPath=CommanderName}" Height="54" HorizontalAlignment="Left" Name="label1" VerticalAlignment="Top" FontFamily="K22 Monastic" FontSize="36" Margin="2,4,0,6" Grid.RowSpan="2" Grid.Column="2" />
<Label Content="Leadership:" HorizontalAlignment="Left" Margin="5,0,0,0" VerticalAlignment="Bottom" Grid.Column="3" />
<ProgressBar HorizontalAlignment="Left" Height="20" Name="CommanderLeadershipProgressBar" VerticalAlignment="Top" Width="150" Grid.Column="3" Grid.Row="2" Margin="10,0,0,0" Minimum="1" Maximum="100" Value="{Binding XPath=CommanderLeadership}" />
<TextBlock Text="{Binding ElementName=CommanderLeadershipProgressBar, Path=Value, StringFormat={}{0:0}%}" HorizontalAlignment="Center" VerticalAlignment="Top" Grid.Column="3" Grid.Row="2" />
<Button Content="Create Subordinate Unit" Height="35" Width="auto" HorizontalAlignment="Left" Margin="10,0,50,0" Name="button1" VerticalAlignment="Center" Grid.Column="4" Grid.RowSpan="2" />
</Grid>
</Grid>
这是 HierarchialDataTemplate2：
<HierarchicalDataTemplate
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
ItemsSource="{Binding XPath=Commander}"
>
<Grid Height="62" Width="auto">
<Grid Height="61" HorizontalAlignment="Left" Margin="0,0,0,0" Name="grid1" VerticalAlignment="Top" Width="auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Image Source= "HeadQuarters.png" Grid.Column="1" Grid.RowSpan="2" HorizontalAlignment="Center" Stretch="None" OpacityMask="White"></Image>
<Label Content="{Binding XPath=CommanderName}" Height="54" HorizontalAlignment="Left" Name="label1" VerticalAlignment="Top" FontFamily="K22 Monastic" FontSize="36" Margin="2,4,0,6" Grid.RowSpan="2" Grid.Column="2" />
<Label Content="Leadership:" HorizontalAlignment="Left" Margin="5,0,0,0" VerticalAlignment="Bottom" Grid.Column="3" />
<ProgressBar HorizontalAlignment="Left" Height="20" Name="CommanderLeadershipProgressBar" VerticalAlignment="Top" Width="150" Grid.Column="3" Grid.Row="2" Margin="10,0,0,0" Minimum="1" Maximum="100" Value="{Binding XPath=CommanderLeadership}" />
<TextBlock Text="{Binding ElementName=CommanderLeadershipProgressBar, Path=Value, StringFormat={}{0:0}%}" HorizontalAlignment="Center" VerticalAlignment="Top" Grid.Column="3" Grid.Row="2" />
<Button Content="Create Subordinate Unit" Height="35" Width="auto" HorizontalAlignment="Left" Margin="10,0,50,0" Name="button1" VerticalAlignment="Center" Grid.Column="4" Grid.RowSpan="2" />
</Grid>
</Grid>
这是 HierarchicalDataTemplate3：
<HierarchicalDataTemplate
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
ItemsSource="{Binding XPath=Unit}"
>
<Grid Height="62" Width="auto">
<Grid Height="61" HorizontalAlignment="Left" Margin="0,0,0,0" Name="grid1" VerticalAlignment="Top" Width="auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Label Content="{Binding XPath=UnitName}" Height="54" HorizontalAlignment="Left" Name="label4" VerticalAlignment="Top" FontFamily="K22 Monastic" FontSize="36" Margin="2,4,0,6" Grid.RowSpan="2" Grid.Column="2" />
</Grid>
</Grid>
这是（新）输出：
就目前而言这很好（如果有人感兴趣，我正在为兵棋构建所谓的战斗序列 Table）。但它不会继续构建整个 TreeView。我认为它只是读取第一个节点并停止。
我错过了什么？谢谢您的帮助。随意打我。
如果我理解你的问题和问题是正确的，那么可能是 Division 的 Commander 的子节点没有渲染？
在这种情况下，您应该将 HierarchicalDataSource 的 ItemsSource 设置为 "Division" 而不是 Commander：
<HierarchicalDataTemplate xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ItemsSource="{Binding XPath=Division}">
然后您可以为 Division 节点内嵌包含一个数据模板，如下所示或在其他地方定义它：
<HierarchicalDataTemplate.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding XPath=DivisionCommanderName}" />
</DataTemplate>
</HierarchicalDataTemplate.ItemTemplate>
如果您有更多子节点，此模板本身可以是 HierarchicalDataTemplate。
编辑：
在 C# 代码中，模板层次结构可能存在误解：
//This is for dynamically building a treeview with templates from an XML file
XmlTextReader xmlReader1 = new XmlTextReader(@"E:\Temp\HierarchicalDataTemplate1.xml");
HierarchicalDataTemplate hierarchicalDataTemplate1 = XamlReader.Load(xmlReader1) as HierarchicalDataTemplate;
XmlTextReader xmlReader2 = new XmlTextReader("HierarchicalDataTemplate2.xml");
HierarchicalDataTemplate hierarchicalDataTemplate2 = XamlReader.Load(xmlReader2) as HierarchicalDataTemplate;
// Original: hierarchicalDataTemplate2.ItemTemplate = hierarchicalDataTemplate2;
hierarchicalDataTemplate1.ItemTemplate = hierarchicalDataTemplate2;
XmlTextReader xmlReader3 = new XmlTextReader("HierarchicalDataTemplate3.xml");
HierarchicalDataTemplate hierarchicalDataTemplate3 = XamlReader.Load(xmlReader3) as HierarchicalDataTemplate;
// Oridignal: hierarchicalDataTemplate3.ItemTemplate = hierarchicalDataTemplate3;
hierarchicalDataTemplate2.ItemTemplate = hierarchicalDataTemplate3;
此外：模板必须反映其相应级别的节点。
我已经准备好接受虐待了。我不明白为什么这不起作用。
这是相关的 XAML:
<Window.Resources>
<XmlDataProvider x:Key="Family" Source="TestArmy1.xml" XPath="/Army"/>
</Window.Resources>
// 截图
<TreeView Name="OOB" Height="880" Background="#00000000"
BorderBrush="#00000000" Padding="100,1,1,50" UseLayoutRounding="False"
MouseRightButtonDown="TreeViewPreviewRightButtonDown" DataContext="{StaticResource Family}" ItemsSource="{Binding XPath=Commander}" FontSize="12" />
这是 C# 代码：
//This is for dynamically building a treeview with templates from an XML file
XmlTextReader xmlReader1 = new XmlTextReader("HierarchicalDataTemplate1.xml");
HierarchicalDataTemplate hierarchicalDataTemplate1 = XamlReader.Load(xmlReader1) as HierarchicalDataTemplate;
XmlTextReader xmlReader2 = new XmlTextReader("HierarchicalDataTemplate2.xml");
HierarchicalDataTemplate hierarchicalDataTemplate2 = XamlReader.Load(xmlReader2) as HierarchicalDataTemplate;
hierarchicalDataTemplate1.ItemTemplate = hierarchicalDataTemplate2;
XmlTextReader xmlReader3 = new XmlTextReader("HierarchicalDataTemplate3.xml");
HierarchicalDataTemplate hierarchicalDataTemplate3 = XamlReader.Load(xmlReader3) as HierarchicalDataTemplate;
hierarchicalDataTemplate2.ItemTemplate = hierarchicalDataTemplate3;
OOB.ItemTemplate = hierarchicalDataTemplate1;
Thread updateThread = new Thread(new ParameterizedThreadStart(UpdateTree));
updateThread.Start(this);
以及构建 TreeView 的代码：
private void UpdateTree(object obj)
{
if (File.Exists("TestArmy1.xml") == false)
{
MessageBox.Show("Unable to open\nTestArmy1.xml");
return;
}
MainWindow window = (MainWindow)obj;
window.Dispatcher.Invoke(DispatcherPriority.Send, new Action(RebuildTree));
}
private void RebuildTree()
{
XmlDataProvider provider = new XmlDataProvider();
XmlDocument xmlFile = new XmlDocument();
xmlFile.Load("TestArmy1.xml");
provider.Document = xmlFile;
provider.XPath = "/Army";
OOB.DataContext = provider;
XmlNode node = xmlFile.DocumentElement.SelectSingleNode("ArmyName");
ArmyNameString = node.InnerText;
ArmyNameTitle.Content = ArmyNameString;
}
这是已加载的 XML 文件 TestArmy1.xml（现已精简）：
<?xml version="1.0" encoding="UTF-8"?>
<Army>
<ArmyName>The Army of Northern Virginia</ArmyName>
<Commander>
<CommanderName>The Emperor With the Very Long Name!</CommanderName>
<CommanderLeadership>94</CommanderLeadership>
<Division>
<DivisionCommanderName>Major General William T. Sherman</DivisionCommanderName>
<DivisionCommanderLeadership>78</DivisionCommanderLeadership>
<Unit>
<UnitName>'Chasseurs à Cheval Garde"</UnitName>
<UnitType>Cavalry</UnitType>
<UnitKStrength>3</UnitKStrength>
<UnitStrength>456</UnitStrength>
<UnitQuality>10</UnitQuality>
<UnitMorale>7</UnitMorale>
<UnitLeadership>7</UnitLeadership>
<UnitAmmunition>99</UnitAmmunition>
</Unit>
</Division>
<Division>
<DivisionCommanderName>Marshal Ney</DivisionCommanderName>
<DivisionCommanderLeadership>8</DivisionCommanderLeadership>
</Division>
</Commander>
</Army>
这是 HierarchicalDataTemplate1：
<HierarchicalDataTemplate
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
ItemsSource="{Binding XPath=Commander}"
>
<Grid Height="62" Width="auto">
<Grid Height="61" HorizontalAlignment="Left" Margin="0,0,0,0" Name="grid1" VerticalAlignment="Top" Width="auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Image Source= "HeadQuarters.png" Grid.Column="1" Grid.RowSpan="2" HorizontalAlignment="Center" Stretch="None" OpacityMask="White"></Image>
<Label Content="{Binding XPath=CommanderName}" Height="54" HorizontalAlignment="Left" Name="label1" VerticalAlignment="Top" FontFamily="K22 Monastic" FontSize="36" Margin="2,4,0,6" Grid.RowSpan="2" Grid.Column="2" />
<Label Content="Leadership:" HorizontalAlignment="Left" Margin="5,0,0,0" VerticalAlignment="Bottom" Grid.Column="3" />
<ProgressBar HorizontalAlignment="Left" Height="20" Name="CommanderLeadershipProgressBar" VerticalAlignment="Top" Width="150" Grid.Column="3" Grid.Row="2" Margin="10,0,0,0" Minimum="1" Maximum="100" Value="{Binding XPath=CommanderLeadership}" />
<TextBlock Text="{Binding ElementName=CommanderLeadershipProgressBar, Path=Value, StringFormat={}{0:0}%}" HorizontalAlignment="Center" VerticalAlignment="Top" Grid.Column="3" Grid.Row="2" />
<Button Content="Create Subordinate Unit" Height="35" Width="auto" HorizontalAlignment="Left" Margin="10,0,50,0" Name="button1" VerticalAlignment="Center" Grid.Column="4" Grid.RowSpan="2" />
</Grid>
</Grid>
这是 HierarchialDataTemplate2：
<HierarchicalDataTemplate
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
ItemsSource="{Binding XPath=Commander}"
>
<Grid Height="62" Width="auto">
<Grid Height="61" HorizontalAlignment="Left" Margin="0,0,0,0" Name="grid1" VerticalAlignment="Top" Width="auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Image Source= "HeadQuarters.png" Grid.Column="1" Grid.RowSpan="2" HorizontalAlignment="Center" Stretch="None" OpacityMask="White"></Image>
<Label Content="{Binding XPath=CommanderName}" Height="54" HorizontalAlignment="Left" Name="label1" VerticalAlignment="Top" FontFamily="K22 Monastic" FontSize="36" Margin="2,4,0,6" Grid.RowSpan="2" Grid.Column="2" />
<Label Content="Leadership:" HorizontalAlignment="Left" Margin="5,0,0,0" VerticalAlignment="Bottom" Grid.Column="3" />
<ProgressBar HorizontalAlignment="Left" Height="20" Name="CommanderLeadershipProgressBar" VerticalAlignment="Top" Width="150" Grid.Column="3" Grid.Row="2" Margin="10,0,0,0" Minimum="1" Maximum="100" Value="{Binding XPath=CommanderLeadership}" />
<TextBlock Text="{Binding ElementName=CommanderLeadershipProgressBar, Path=Value, StringFormat={}{0:0}%}" HorizontalAlignment="Center" VerticalAlignment="Top" Grid.Column="3" Grid.Row="2" />
<Button Content="Create Subordinate Unit" Height="35" Width="auto" HorizontalAlignment="Left" Margin="10,0,50,0" Name="button1" VerticalAlignment="Center" Grid.Column="4" Grid.RowSpan="2" />
</Grid>
</Grid>
这是 HierarchicalDataTemplate3：
<HierarchicalDataTemplate
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
ItemsSource="{Binding XPath=Unit}"
>
<Grid Height="62" Width="auto">
<Grid Height="61" HorizontalAlignment="Left" Margin="0,0,0,0" Name="grid1" VerticalAlignment="Top" Width="auto">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Label Content="{Binding XPath=UnitName}" Height="54" HorizontalAlignment="Left" Name="label4" VerticalAlignment="Top" FontFamily="K22 Monastic" FontSize="36" Margin="2,4,0,6" Grid.RowSpan="2" Grid.Column="2" />
</Grid>
</Grid>
这是（新）输出：
就目前而言这很好（如果有人感兴趣，我正在为兵棋构建所谓的战斗序列 Table）。但它不会继续构建整个 TreeView。我认为它只是读取第一个节点并停止。
我错过了什么？谢谢您的帮助。随意打我。
如果我理解你的问题和问题是正确的，那么可能是 Division 的 Commander 的子节点没有渲染？
在这种情况下，您应该将 HierarchicalDataSource 的 ItemsSource 设置为 "Division" 而不是 Commander：
<HierarchicalDataTemplate xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ItemsSource="{Binding XPath=Division}">
然后您可以为 Division 节点内嵌包含一个数据模板，如下所示或在其他地方定义它：
<HierarchicalDataTemplate.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding XPath=DivisionCommanderName}" />
</DataTemplate>
</HierarchicalDataTemplate.ItemTemplate>
如果您有更多子节点，此模板本身可以是 HierarchicalDataTemplate。
编辑：
在 C# 代码中，模板层次结构可能存在误解：
//This is for dynamically building a treeview with templates from an XML file
XmlTextReader xmlReader1 = new XmlTextReader(@"E:\Temp\HierarchicalDataTemplate1.xml");
HierarchicalDataTemplate hierarchicalDataTemplate1 = XamlReader.Load(xmlReader1) as HierarchicalDataTemplate;
XmlTextReader xmlReader2 = new XmlTextReader("HierarchicalDataTemplate2.xml");
HierarchicalDataTemplate hierarchicalDataTemplate2 = XamlReader.Load(xmlReader2) as HierarchicalDataTemplate;
// Original: hierarchicalDataTemplate2.ItemTemplate = hierarchicalDataTemplate2;
hierarchicalDataTemplate1.ItemTemplate = hierarchicalDataTemplate2;
XmlTextReader xmlReader3 = new XmlTextReader("HierarchicalDataTemplate3.xml");
HierarchicalDataTemplate hierarchicalDataTemplate3 = XamlReader.Load(xmlReader3) as HierarchicalDataTemplate;
// Oridignal: hierarchicalDataTemplate3.ItemTemplate = hierarchicalDataTemplate3;
hierarchicalDataTemplate2.ItemTemplate = hierarchicalDataTemplate3;
此外：模板必须反映其相应级别的节点。