C# wpftreeview刷新
我有个问题。我在WPF项目中使用C# wpftreeview刷新,c#,wpf,xml,treeview,C#,Wpf,Xml,Treeview,我有个问题。我在WPF项目中使用TreeView来可视化XML数据。问题是,当我编辑XmlDocument时,它不会在TreeView中刷新。但我注意到,当我选中SelectedNode时,它是我编辑的XmlNode。所以我的“编辑”方法工作得很好,但在可视化刷新我的树时只有一个问题.Refresh()或.Items.Refresh()也不起作用 以下是我的树的模板: <DataTemplate x:Key="AttributeTemplate"> <StackPane
TreeView
来可视化XML数据。问题是,当我编辑XmlDocument
时,它不会在TreeView
中刷新。但我注意到,当我选中SelectedNode
时,它是我编辑的XmlNode
。所以我的“编辑”方法工作得很好,但在可视化刷新我的树时只有一个问题.Refresh()
或.Items.Refresh()
也不起作用
以下是我的树的模板:
<DataTemplate x:Key="AttributeTemplate">
<StackPanel Orientation="Horizontal"
Margin="3,0,0,0"
HorizontalAlignment="Center">
<TextBlock Text="{Binding Path=Name}"
Foreground="{StaticResource xmAttributeBrush}" FontFamily="Consolas" FontSize="8pt" />
<TextBlock Text="=""
Foreground="{StaticResource xmlMarkBrush}" FontFamily="Consolas" FontSize="8pt" />
<TextBlock Text="{Binding Path=Value, Mode=TwoWay}"
Foreground="{StaticResource xmlValueBrush}" FontFamily="Consolas" FontSize="8pt" />
<TextBlock Text="""
Foreground="{StaticResource xmlMarkBrush}" FontFamily="Consolas" FontSize="8pt" />
</StackPanel>
</DataTemplate>
<HierarchicalDataTemplate x:Key="NodeTemplate">
<StackPanel Orientation="Horizontal" Focusable="False">
<TextBlock x:Name="tbName" Text="?" FontFamily="Consolas" FontSize="8pt" />
<ItemsControl
ItemTemplate="{StaticResource AttributeTemplate}"
ItemsSource="{Binding Path=Attributes}"
HorizontalAlignment="Center">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</StackPanel>
<HierarchicalDataTemplate.ItemsSource>
<Binding XPath="*" />
</HierarchicalDataTemplate.ItemsSource>
<HierarchicalDataTemplate.Triggers>
<DataTrigger Binding="{Binding Path=NodeType}" Value="Text">
<Setter TargetName="tbName" Property="Text" Value="{Binding Path=Value, Mode=TwoWay}"/>
</DataTrigger>
<DataTrigger Binding="{Binding Path=NodeType}" Value="Element">
<Setter TargetName="tbName" Property="Text" Value="{Binding Path=Name}"/>
</DataTrigger>
</HierarchicalDataTemplate.Triggers>
</HierarchicalDataTemplate>
<Style x:Key="TreeViewAllExpandedStyle" TargetType="{x:Type TreeView}">
<Style.Resources>
<Style TargetType="TreeViewItem">
<Setter Property="IsExpanded" Value="True" />
</Style>
</Style.Resources>
</Style>
<Style x:Key="TreeViewAllCollapsedStyle" TargetType="{x:Type TreeView}">
<Style.Resources>
<Style TargetType="TreeViewItem">
<Setter Property="IsExpanded" Value="False" />
</Style>
</Style.Resources>
</Style>
这是我的树:
<TreeView x:Name="XmlTree" Grid.Row="1"
ItemsSource="{Binding Source={StaticResource XmlData}, XPath=., Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
ItemTemplate="{StaticResource NodeTemplate}"
SelectedItemChanged="XmlTree_SelectedItemChanged" />
下面是我的代码:
private XmlDocument _xml;
private XmlElement _selectedElement;
private XmlDataProvider _xmlDataProvider;
private void MainWindow_Load(object sender, EventArgs e)
{
XmlTree.Style = (Style)FindResource("TreeViewAllExpandedStyle");
_xmlDataProvider = FindResource("XmlData") as XmlDataProvider;
}
private void OpenXmlFile(string filePath)
{
_xml = new XmlDocument();
_xml.Load(filePath);
_xmlDataProvider.Document = _xml;
}
private void SaveChangesButton_Click(object sender, EventArgs e)
{
Dictionary<string, string> newAttributes = GetChangedAttributes();
foreach (KeyValuePair<string, string> pair in newAttributes)
{
_selectedElement.SetAttribute(pair.Key, pair.Value);
}
RefreshViews();
}
private void RefreshViews()
{
// now I don't know what to do here, any Refresh doesn't work:S
}
private-XmlDocument\u-xml;
私有XmlElement _selectedElement;
私有XmlDataProvider_XmlDataProvider;
私有void主窗口加载(对象发送方、事件参数)
{
Style=(Style)FindResource(“TreeViewer扩展样式”);
_xmlDataProvider=FindResource(“XmlData”)作为xmlDataProvider;
}
私有void OpenXmlFile(字符串文件路径)
{
_xml=新的XmlDocument();
_Load(文件路径);
_Document=\uXML;
}
私有无效保存更改按钮单击(对象发送者,事件参数e)
{
Dictionary newAttributes=GetChangedAttributes();
foreach(newAttributes中的KeyValuePair对)
{
_selectedElement.SetAttribute(pair.Key、pair.Value);
}
刷新视图();
}
私有视图()
{
//现在我不知道该怎么做,任何刷新都不起作用:S
}
第二件事是,如何清除我的树,以便能够再次将其用于另一个数据(我在尝试
XmlTree.Items.clear();
时遇到了NullReferenceException
,经过数小时后终于找到了解决方案
private void RefreshViews()
{
XmlEditor.Clear();
XmlEditor.Text = IndentXml();
UnselectSelectedItem();
XmlTree.Items.Refresh();
XmlTree.UpdateLayout();
}
private void UnselectSelectedItem()
{
if (XmlTree.SelectedItem != null)
{
var container = FindTreeViewSelectedItemContainer(XmlTree, XmlTree.SelectedItem);
if (container != null)
{
container.IsSelected = false;
}
}
}
private static TreeViewItem FindTreeViewSelectedItemContainer(ItemsControl root, object selection)
{
var item = root.ItemContainerGenerator.ContainerFromItem(selection) as TreeViewItem;
if (item == null)
{
foreach (var subItem in root.Items)
{
item = FindTreeViewSelectedItemContainer((TreeViewItem)root.ItemContainerGenerator.ContainerFromItem(subItem), selection);
if (item != null)
{
break;
}
}
}
return item;
}
由于某种原因,阳光下的一切对我都不起作用,我所需要的就是在我的树上刷新一个图像,如果这个项目被更改了。所以我做了一些可笑的事情,但效果很好。 首先,我向图像中添加了一个已加载的事件,并将标记设置为数据库中记录的唯一id
Tag="{Binding ObjectId}" Loaded="imgCheckComment_Loaded"
在加载事件的代码隐藏中,我建立了每个图像的列表
private List<Image> commentColors = new List<Image>();
private void imgCheckComment_Loaded(object sender, RoutedEventArgs e)
{
var si = sender as Image;
if (si != null)
commentColors.Add(si);
}
你是最棒的!我需要这些神奇的句子:XmlTree.Items.Refresh();XmlTree.UpdateLayout();非常感谢,解决了我的问题!Yeee,它们会让人紧张:)
private List<Image> commentColors = new List<Image>();
private void imgCheckComment_Loaded(object sender, RoutedEventArgs e)
{
var si = sender as Image;
if (si != null)
commentColors.Add(si);
}
public void RefreshContext(Item selectedItem)
{
commentColors.ForEach(si => {
if (selectedItem.ObjectId == Convert.ToInt32(si.Tag))
{
si.Source = new BitmapImage(new Uri(selectedItem.Image, UriKind.Relative));
return;
}
});
}