自从iv'e使用WPF以来,已经有很长一段时间了,现在需要在它上面做一个小项目,制作简单的数据表树视图时我有一个非常奇怪的问题。
到目前为止的主窗口:
public partial class MainWindow : Window, INotifyPropertyChanged
{
public MainWindow()
{
InitializeComponent();
populateTreeview();
}
private XMLDataNode tree;
public XMLDataNode TreeRoot
{
get { return tree; }
set
{
tree = value;
NotifyPropertyChanged("TreeRoot");
}
}
//Open the XML file, and start to populate the treeview
private void populateTreeview()
{
{
try
{
//Just a good practice -- change the cursor to a
//wait cursor while the nodes populate
this.Cursor = Cursors.Wait;
string filePath = System.IO.Path.GetFullPath("TestXML.xml");
TreeRoot = RXML.IOManager.GetXMLFromFile(filePath).Last();
}
catch (XmlException xExc)
//Exception is thrown is there is an error in the Xml
{
MessageBox.Show(xExc.Message);
}
catch (Exception ex) //General exception
{
MessageBox.Show(ex.Message);
}
finally
{
this.Cursor = Cursors.AppStarting; //Change the cursor back
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged(string propName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propName));
}
}
我正在使用的数据类将XML节点加载到自身中:
public class XMLDataNode
{
public XmlNode node;
public string Title;
public List<XMLDataNode> Children;
public XMLDataNode(XmlNode XMLNode)
{
this.node = XMLNode;
this.Title = node.ToString();
Children = new List<XMLDataNode>();
foreach (XmlNode item in XMLNode.ChildNodes)
{
Children.Add(new XMLDataNode(item));
}
}
主窗口XAML:
<Window x:Class="RotemXMLEditor.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="800" Width="1000" x:Name="me">
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<TreeView Grid.Row="1" x:Name="treeView" Background="White" ItemsSource="{Binding ElementName=me, Path=TreeRoot}">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Children}">
<TextBlock Text="{Binding Title}"/>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
</Grid>
当前输出是一个空树视图,其中没有任何内容,即使数据表对象填充了信息。
我意识到这可能是一个愚蠢的错误,但我似乎无法找到错误,帮助?
答案 0 :(得分:0)
您可以在实现IEnumerable的集合中转换此属性吗?
public XMLDataNode TreeRoot
e.g:
public XMLDataNode[] TreeRoots
TreeView的ItemsSource需要一个实现IEnumerable
的类型这对我有用:
<TreeView Grid.Row="1" x:Name="treeView" Background="White" ItemsSource="{Binding ElementName=me, Path=TreeRoots}">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Children}">
<TextBlock Text="{Binding Title}"/>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
private XMLDataNode[] treeRoots;
public XMLDataNode[] TreeRoots
{
get { return treeRoots; }
set
{
treeRoots = value;
NotifyPropertyChanged("TreeRoots");
}
}
private void populateTreeview()
{
{
try
{
//Just a good practice -- change the cursor to a
//wait cursor while the nodes populate
this.Cursor = Cursors.Wait;
string filePath = System.IO.Path.GetFullPath("TestXML.xml");
TreeRoot = RXML.IOManager.GetXMLFromFile(filePath).Last();
TreeRoots = new[] { TreeRoot };
}
catch (XmlException xExc)
答案 1 :(得分:0)
我找到了解决方案。
WPF数据绑定只能使用属性而不是字段来工作(我忘了),即使字段是公共的,将所有数据绑定字段更改为实际属性也可以解决此问题。