我正在使用FlowDocumentPageViewer创建搜索并突出显示文本，类似于给定的链接。
http://kentb.blogspot.com/2009/06/search-and-highlight-text-in-arbitrary.html
当我搜索字符串的标记时，（使用字符串列表）一切正常，我得到了适当的矩形应用。但我这里有两个问题，
当我更改FlowDocumentPageViewer的页面时，我的矩形突出显示区域保持不变，并且不会与文本下沉。
当我放大或缩小FlowDocumentPageViewer时，文字会变焦但高光矩形保持在同一位置，
请帮助我解决这个问题，以便将矩形应用于Text本身。我在这里提出申请。如果您需要更多信息，请与我们联系。
<StackPanel Grid.Row="0" Orientation="Horizontal">
<TextBox x:Name="_searchTextBox" Text="{Binding SearchText, UpdateSourceTrigger=PropertyChanged}" Width="200" Height="20" Margin="2"/>
<Button x:Name="_searchButton" Height="{Binding Height, ElementName=_searchTextBox}" Width="50" Content="GO">
</Button>
<Button x:Name="_listItems" Height="{Binding Height, ElementName=_searchTextBox}" Width="50" Content="List"/>
</StackPanel>
<Grid Grid.Row="1">
<FlowDocumentPageViewer>
<FlowDocument Foreground="Black" FontFamily="Arial">
<Paragraph FontSize="11">
The following details have been details from Amazon to match your initial query.Some of the returned values may have been empty, so have been ommitted from theresults shown here.Also where there have been more than one value returned viathe Amazon Details, these to have beenomitted for the sake of keeping things simplefor this small demo application. Simple is good,when trying to show how something works
</Paragraph>
</FlowDocument>
</FlowDocumentPageViewer>
</Grid>
<ItemsControl ItemsSource="{Binding SearchRectangles}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Canvas/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Rectangle Fill="#99FFFF00" Width="{Binding Width}" Height="{Binding Height}" Tag="{Binding Text}" MouseDown="Rectangle_MouseDown">
<Rectangle.Style>
<Style TargetType="{x:Type Rectangle}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="BitmapEffect">
<Setter.Value>
<OuterGlowBitmapEffect GlowColor="BurlyWood" GlowSize="7"/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Rectangle.Style>
</Rectangle>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemContainerStyle>
<Style>
<Setter Property="Canvas.Top" Value="{Binding Top}"/>
<Setter Property="Canvas.Left" Value="{Binding Left}"/>
</Style>
</ItemsControl.ItemContainerStyle>
</ItemsControl>
</Grid>
</Grid>
public partial class Window1 : Window
{
public static readonly DependencyProperty SearchTextProperty = DependencyProperty.Register("SearchText",
typeof(string),
typeof(Window1));
public static readonly DependencyProperty SearchRectanglesProperty = DependencyProperty.Register("SearchRectangles",
typeof(ICollection<SearchRectangle>),
typeof(Window1));
public IList<string> SearchTokens { get; set; }
public Window1()
{
InitializeComponent();
SearchRectangles = new ObservableCollection<SearchRectangle>();
_searchButton.Click += delegate
{
DoSearch();
};
_listItems.Click += delegate
{
SearchTokens = new List<string>();
SearchTokens.Add("been");
SearchTokens.Add("Amazon");
SearchTokens.Add("following");
DoSearch(SearchTokens);
};
_searchTextBox.KeyDown += delegate(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
DoSearch();
}
};
}
public void DoSearch(IList<string> searchTokens)
{
SearchRectangles.Clear();
if (searchTokens == null)
return;
foreach (string token in searchTokens)
{
SearchText = token;
DoSearch();
}
}
public string SearchText
{
get { return GetValue(SearchTextProperty) as string; }
set { SetValue(SearchTextProperty, value); }
}
public ICollection<SearchRectangle> SearchRectangles
{
get { return GetValue(SearchRectanglesProperty) as ICollection<SearchRectangle>; }
set { SetValue(SearchRectanglesProperty, value); }
}
private void DoSearch()
{
DoSearch(false);
}
private void DoSearch(bool clearExisting)
{
if( clearExisting == true )
SearchRectangles.Clear();
if (SearchText.Length == 0)
{
return;
}
DoSearch(this);
}
private void DoSearch(DependencyObject searchIn)
{
if (searchIn == null)
{
return;
}
var contentHost = searchIn as IContentHost;
if (contentHost != null)
{
DoSearch(contentHost as UIElement, contentHost);
}
else
{
var documentViewerBase = searchIn as DocumentViewerBase;
if (documentViewerBase != null)
{
//extract the content hosts from the document viewer
foreach (var pageView in documentViewerBase.PageViews)
{
contentHost = pageView.DocumentPage as IContentHost;
if (contentHost != null)
{
DoSearch(documentViewerBase, contentHost);
}
}
}
}
//recurse through children
var childCount = VisualTreeHelper.GetChildrenCount(searchIn);
for (var i = 0; i < childCount; ++i)
{
DoSearch(VisualTreeHelper.GetChild(searchIn, i));
}
}
private void DoSearch(UIElement uiHost, IContentHost contentHost)
{
if (uiHost == null)
{
return;
}
var textBlock = contentHost as TextBlock;
if (textBlock != null)
{
//this has the side affect of converting any plain string content in the TextBlock into a hosted Run element
//that's bad in that it is unexpected, but good in that it allows us to access the hosted elements in a
//consistent fashion below, rather than special-casing TextBlocks with text only content
var contentStart = textBlock.ContentStart;
}
var hostedElements = contentHost.HostedElements;
while (hostedElements.MoveNext())
{
var run = hostedElements.Current as Run;
if (run != null && !string.IsNullOrEmpty(run.Text))
{
ApplyHighlighting(run.Text, delegate(int start, int length)
{
var textPointer = run.ContentStart;
textPointer = textPointer.GetPositionAtOffset(start, LogicalDirection.Forward);
var leftRectangle = textPointer.GetCharacterRect(LogicalDirection.Forward);
textPointer = textPointer.GetPositionAtOffset(length, LogicalDirection.Forward);
var rightRectangle = textPointer.GetCharacterRect(LogicalDirection.Backward);
var rect = new Rect(leftRectangle.TopLeft, rightRectangle.BottomRight);
var translatedPoint = uiHost.TranslatePoint(new Point(0, 0), null);
rect.Offset(translatedPoint.X, translatedPoint.Y);
return rect;
});
}
}
}
private void ApplyHighlighting(string text, Func<int, int, Rect> getRectHandler)
{
var currentIndex = 0;
while (true)
{
var index = text.IndexOf(SearchText, currentIndex, StringComparison.CurrentCultureIgnoreCase);
if (index == -1)
{
return;
}
var rect = getRectHandler(index, SearchText.Length);
if (rect != Rect.Empty)
{
SearchRectangles.Add(new SearchRectangle(rect.Top, rect.Left, rect.Width, rect.Height,SearchText));
}
currentIndex = index + SearchText.Length;
}
}
private void Rectangle_MouseDown(object sender, MouseEventArgs e)
{
Rectangle r = sender as Rectangle;
MessageBox.Show(r.Tag.ToString());
}
private void FlowDocumentPageViewer_PageViewsChanged(object sender, EventArgs e)
{
}
private void Window_SizeChanged(object sender, SizeChangedEventArgs e)
{
DoSearch(SearchTokens);
}
}
public class SearchRectangle
{
private readonly double _top;
private readonly double _left;
private readonly double _width;
private readonly double _height;
private readonly string _text;
public SearchRectangle(double top, double left, double width, double height,string text)
{
_top = top;
_left = left;
_width = width;
_height = height;
_text = text;
}
public string Text
{
get { return _text; }
}
public double Top
{
get { return _top; }
}
public double Left
{
get { return _left; }
}
public double Width
{
get { return _width; }
}
public double Height
{
get { return _height; }
}
}
最佳，
巴拉。
答案 0 :(得分：0)
看似简单的解决方案是实际编辑文档以便在搜索时进行高亮显示，记住在清除搜索结果时将其编辑回来或将未编辑的文档用于其他目的（例如保存） ）。
您可以使用code I posted in this answer在文档中搜索文本。在您的情况下，不是将选择设置为找到的每个范围，而是要像这样对范围进行处理：
public void HilightMatches(TextRange searchRange, string searchText)
{
var start = searchRange.Start;
while(start != searchRange.End)
{
var foundRange = FindTextInRange(
new TextRange(start, searchRange.End),
searchText);
if(foundRange==null) return;
// Here is the meat...
foundRange.ApplyPropertyValue(TextElement.BackgroundProperty, Brushes.Yellow);
start = foundRange.End;
}
}
要完成图片，您需要一种在完成后清除hilighting的方法。几个选项：
保存已加亮的范围，以便您可以使用ApplyPropertyValue应用Brushes.Transparent背景（简单，但这将删除之前设置的任何背景）
将找到的每个范围拆分为运行并保存每个运行列表的原始背景颜色，以便于恢复
在您使用它之前保存整个文档，然后将其恢复以删除hilighting
如果文档位于RichTextBox中，并且不允许用户编辑文档，则只需使用撤消机制即可。确保你的TextBoxBase.UndoLimit在进行hilighting时增加，然后删除hilighting，只需在每个hilight上调用TextBoxBase.Undo（）一次。
答案 1 :(得分：0)