相关疑难解决方法(0)

我正在尝试在文件夹图标中更改TreeView的图标.当它崩溃时,它需要有一个打开的文件夹图标.

我的树视图中有数据绑定项,代码是:

<TreeView x:Name="TreeViewCategories"  Grid.Row="0" Grid.Column="1" Height="610" HorizontalAlignment="Left"  Margin="29,111,0,0" VerticalAlignment="Top" Width="315" BorderThickness="0" Background="Transparent" >
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate  ItemsSource="{Binding Items}">
            <TextBlock FontSize="20" Text="{Binding Name}" PreviewMouseDown="TextBlock_PreviewMouseDown"/>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

这也是我用XML中的项填充树视图的方法(这是一段很多代码:

private void LoadHospitalXML()
{
    try
    {
        FileStream fs = new FileStream("ConfigOrgHospital.xml", FileMode.Open, FileAccess.Read);

        var xml = XmlReader.Create(fs);

        rootElement = ConvertHospitalData(xml);

        this.TreeViewCategories.ItemsSource = null;
        List<HospitalWrapper> li = new List<HospitalWrapper>();
        var hosp = rootElement.Items.FirstOrDefault();
        if (hosp != null)
        {
            foreach (var i in hosp.Hospital)
            {
                li.AddIfNotNull(CreateHospList(i));
            }
        }

        this.TreeViewCategories.ItemsSource = li;
    }
    catch (Exception e) …