C# WPF树视图没有显示任何内容
我无法使数据显示在树视图中。我在树状视图上方有一个标签,它绑定到我的viewmodel,并且可以正常工作。我对树视图做了什么错误 这就是我所做的 型号:C# WPF树视图没有显示任何内容,c#,wpf,binding,treeview,hierarchicaldatatemplate,C#,Wpf,Binding,Treeview,Hierarchicaldatatemplate,我无法使数据显示在树视图中。我在树状视图上方有一个标签,它绑定到我的viewmodel,并且可以正常工作。我对树视图做了什么错误 这就是我所做的 型号: public class ViewConfiguration { public string Name { get; set; } public List<ViewRuleSet> RuleSets { get; set; } public ViewConfiguration(string name, pa
public class ViewConfiguration
{
public string Name { get; set; }
public List<ViewRuleSet> RuleSets { get; set; }
public ViewConfiguration(string name, params ViewRuleSet[] ruleSets)
{
this.Name = name;
this.RuleSets = new List<ViewRuleSet>(ruleSets);
}
}
public class ViewRuleSet
{
public string Name { get; set; }
public List<ViewRule> Rules { get; set; }
public ViewRuleSet(string name, params ViewRule[] rules)
{
this.Name = name;
this.Rules = new List<ViewRule>(rules);
}
}
public class ViewRule
{
public string Name { get; set; }
public ViewRule(string name)
{
this.Name = name;
}
}
视图:
xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vm=“clr命名空间:TreeViewer.ViewModel”
xmlns:m=“clr命名空间:TreeViewer.Model”
x:Class=“TreeViewer.main窗口”
Title=“MainWindow”Height=“350”Width=“525”>
下面是我看到的:(我还尝试通过代码显式设置主窗口的DataContext。this.DataContext=new MainViewModel();
)
TreeView.ItemsSource的值必须是集合,而不是单个对象。您应该绑定到
Configuration.RuleSets
,而不是Configuration
。当然,您必须相应地调整您的HierarchycalDataTemplate
。谢谢-我刚刚将ViewModel中的配置更改为List Configurations
,并且成功了。您可以添加他实现IList并返回实现它以适应规则
public class MainViewModel
{
public ViewConfiguration Configuration { get; set; }
public MainViewModel()
{
var rule = new ViewRule("MyRule");
var ruleSet = new ViewRuleSet("MyRuleSet", rule);
this.Configuration = new ViewConfiguration("MyConfiguration", ruleSet);
}
}
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vm="clr-namespace:TreeViewer.ViewModel"
xmlns:m="clr-namespace:TreeViewer.Model"
x:Class="TreeViewer.MainWindow"
Title="MainWindow" Height="350" Width="525">
<Window.DataContext>
<vm:MainViewModel/>
</Window.DataContext>
<Grid>
<Label Margin="10,10,10,0" VerticalAlignment="Top" Content="{Binding Configuration.Name}"/>
<TreeView ItemsSource="{Binding Configuration}" Margin="0,41,0,0">
<!-- Configuration template -->
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding RuleSets}">
<TextBlock Foreground="Red" Text="{Binding Name}" />
<!-- RuleSet template -->
<HierarchicalDataTemplate.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Rules}">
<TextBlock Text="{Binding Name}" />
<!-- Rule template -->
<HierarchicalDataTemplate.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</HierarchicalDataTemplate.ItemTemplate>
</HierarchicalDataTemplate>
</HierarchicalDataTemplate.ItemTemplate>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
</Grid>