突出显示documentviewer中的所有匹配

我知道如果文档是xpsdocument，wpf-documentviewer支持在文档中搜索。 搜索只突出显示一个接一个的命中。

是否可以通过搜索框突出显示所有匹配？

我有以下代码来创建和设置DocumentViewer-Control的文档：

public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); FixedDocument fixedDocument = CreateTestDocument(); this.documentViewer.Document = BuildFixedDocumentSequence(fixedDocument); } private static FixedDocumentSequence BuildFixedDocumentSequence(FixedDocument fixedDocument) { MemoryStream ms = new MemoryStream(); Uri documentUri = new Uri("pack://document.xps"); Package p = Package.Open(ms, FileMode.Create, FileAccess.ReadWrite); PackageStore.AddPackage(documentUri, p); XpsDocument xpsDocument = new XpsDocument(p, CompressionOption.NotCompressed, documentUri.AbsoluteUri); XpsDocumentWriter dw = XpsDocument.CreateXpsDocumentWriter(xpsDocument); dw.Write(fixedDocument); FixedDocumentSequence fixedDocumentSequence = xpsDocument.GetFixedDocumentSequence(); if (fixedDocumentSequence == null) return null; return fixedDocumentSequence; } public FixedDocument CreateTestDocument() { FixedDocument document = new FixedDocument(); PrintDialog printDialog = new PrintDialog(); document.DocumentPaginator.PageSize = new Size(printDialog.PrintableAreaWidth, printDialog.PrintableAreaHeight); AddPage(document, "This is the first page"); AddPage(document, "This is not the first page"); AddPage(document, "This is the third page"); return document; } private void AddPage(FixedDocument document, string content) { FixedPage page = new FixedPage { Width = document.DocumentPaginator.PageSize.Width, Height = document.DocumentPaginator.PageSize.Height }; TextBlock pageText = new TextBlock { Text = content, FontSize = 40, Margin = new Thickness(96) }; page.Children.Add(pageText); PageContent pageContent = new PageContent(); ((IAddChild)pageContent).AddChild(page); document.Pages.Add(pageContent); } } 

xaml代码仅由documentviewer组成。 现在，如果我在“文档查看器”的搜索框中键入“页面”并按回车键，则会突出显示第一页上的“页面”一词。 通过另一次按下返回键，第二页上的“页面”一词突出显示。

我想要实现的是，通过第一次按回车键，所有单词“page”都会突出显示。

Answer 1

我找不到这样做的简单方法。 经过大量的反复试验，但主要是反思（双关语;），这可以做到 – 当它真正起作用时，我仍然感到非常惊讶。

我将DocumentViewer子类化，然后从那里开始。 http://reflector.webtropy.com网站非常方便，如果没有源代码，就不会有任何问题。

背后的代码没有改变，从问题post中获取。

用法：

MyDocumentViewer：

 /// 
 /// DocumentViewer that has his Search Box overridden in order to select multiple results in the document. /// Use IsMultiSearchEnabled to turn off this behavior. /// The number of results can be limited with the MaxSearchResults property. /// 
 public class MyDocumentViewer : DocumentViewer { private ToolBar _myfindToolbar; // MS.Internal.Documents.FindToolBar private object _mydocumentScrollInfo; // MS.Internal.Documents.DocumentGrid private MethodInfo _miFind; // DocumentViewerBase.Find(FindToolBar) private MethodInfo _miGoToTextBox; // FindToolBar.GoToTextBox() private MethodInfo _miMakeSelectionVisible; // DocumentGrid.MakeSelectionVisible() /// 
 /// Limit for returned search results. 0 for no limit, default is int.MaxValue. /// 
 public int MaxSearchResults { get { return (int)GetValue(MaxSearchResultsProperty); } set { SetValue(MaxSearchResultsProperty, value); } } public static readonly DependencyProperty MaxSearchResultsProperty = DependencyProperty.Register("MaxSearchResults", typeof(int), typeof(MyDocumentViewer), new PropertyMetadata(int.MaxValue)); /// 
 /// Determines if the search of the find toolbox is overridden and multiple search results are selected in the document. /// 
 public bool IsMultiSearchEnabled { get { return (bool)GetValue(IsMultiSearchEnabledProperty); } set { SetValue(IsMultiSearchEnabledProperty, value); } } public static readonly DependencyProperty IsMultiSearchEnabledProperty = DependencyProperty.Register("IsMultiSearchEnabled", typeof(bool), typeof(MyDocumentViewer), new PropertyMetadata(true)); public override void OnApplyTemplate() { base.OnApplyTemplate(); if (IsMultiSearchEnabled) { // get some private fields from the base class DocumentViewer _myfindToolbar = this.GetType().GetPrivateFieldOfBase("_findToolbar").GetValue(this) as ToolBar; _mydocumentScrollInfo = this.GetType().GetPrivateFieldOfBase("_documentScrollInfo").GetValue(this); // replace button click handler of find toolbar EventInfo evt = _myfindToolbar.GetType().GetEvent("FindClicked"); ReflectionHelper.RemoveEventHandler(_myfindToolbar, evt.Name); // remove existing handler evt.AddEventHandler(_myfindToolbar, new EventHandler(OnFindInvoked)); // attach own handler // get some methods that will need to be invoked _miFind = this.GetType().GetMethod("Find", BindingFlags.NonPublic | BindingFlags.Instance); _miGoToTextBox = _myfindToolbar.GetType().GetMethod("GoToTextBox"); _miMakeSelectionVisible = _mydocumentScrollInfo.GetType().GetMethod("MakeSelectionVisible"); } } /// 
 /// This is replacing DocumentViewer.OnFindInvoked(object sender, EventArgs e) /// 
 private void OnFindInvoked(object sender, EventArgs e) { IList allSegments = null; // collection of text segments TextRange findResult = null; // could also use object, does not need type //Give ourselves focus, this ensures that the selection //will be made visible after it's made. this.Focus(); // Drill down to the list of selected text segments: DocumentViewer.TextEditor.Selection.TextSegments object textEditor = this.GetType().GetProperty("TextEditor", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(this); // System.Windows.Documents.TextEditor object selection = textEditor.GetType().GetProperty("Selection", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(textEditor); // System.Windows.Documents.TextSelection FieldInfo fiTextSegments = selection.GetType().GetPrivateFieldOfBase("_textSegments"); IList textSegments = fiTextSegments.GetValue(selection) as IList; // List // Clearing the selection in order to start search from the beginning of the document. I suspect there might be a better way of doing this. object segmentStart = textSegments[0].GetType().GetField("_start", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(textSegments[0]); // get segment start (one textsegment is always present) int currentOffset = (int)segmentStart.GetType().GetProperty("System.Windows.Documents.ITextPointer.Offset", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(segmentStart); // get offset of segment start segmentStart = segmentStart.GetType().GetMethod("CreatePointer", new Type[] { segmentStart.GetType(), typeof(int) }).Invoke(segmentStart, new object[] { segmentStart, -currentOffset }); // set the offset back to 0 textSegments[0] = textSegments[0].GetType().GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, null, new Type[] { segmentStart.GetType(), segmentStart.GetType() }, null) .Invoke(new object[] { segmentStart, segmentStart}); // create a new textsegment with resetted offset for (int i = 1; i < textSegments.Count; i++) { textSegments.RemoveAt(i); // remove all other segments } // Always search down _myfindToolbar.GetType().GetProperty("SearchUp").SetValue(_myfindToolbar, false); // Search and collect the find results int resultCount = 0; do { // invoke: DocumentViewerBase.Find(findToolBar) findResult = _miFind.Invoke(this, new object[] { _myfindToolbar }) as TextRange; if (findResult != null) { // get the selected TextSegments of the search textSegments = fiTextSegments.GetValue(selection) as IList; // List if (allSegments == null) allSegments = textSegments; // first search find, set whole collection else allSegments.Add(textSegments[0]); // after first find, add to collection resultCount++; } } while (findResult != null && (MaxSearchResults == 0 || resultCount < MaxSearchResults)); // stop if no more results were found or limit is exceeded if (allSegments == null) { // alert the user that we did not find anything string searchText = _myfindToolbar.GetType().GetProperty("SearchText").GetValue(_myfindToolbar) as string; string messageString = string.Format("Searched the document. Cannot find '{0}'.", searchText); MessageBox.Show(messageString, "Find", MessageBoxButton.OK, MessageBoxImage.Asterisk); } else { // set the textsegments field to the collected search results fiTextSegments.SetValue(selection, allSegments); // this marks the text. invoke: DocumentGrid.MakeSelectionVisible() _miMakeSelectionVisible.Invoke(_mydocumentScrollInfo, null); } // put the focus back on the findtoolbar textbox to search again. invoke: FindToolBar.GoToTextBox() _miGoToTextBox.Invoke(_myfindToolbar, null); } } public static class ReflectionExtensions { /// 
 /// Gets private field of base class. Normally, they are not directly accessible in a GetField call. /// 
 public static FieldInfo GetPrivateFieldOfBase(this Type type, string fieldName) { BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.NonPublic; // Declare variables FieldInfo fieldInfo = null; // Search as long as there is a type while (type != null) { // Use reflection fieldInfo = type.GetField(fieldName, bindingFlags); // Yes, do we have a field? if (fieldInfo != null) break; // Get base class type = type.BaseType; } // Return result return fieldInfo; } } /// 
 /// http://www.codeproject.com/Articles/103542/Removing-Event-Handlers-using-Reflection /// 
 public static class ReflectionHelper { static Dictionary> dicEventFieldInfos = new Dictionary>(); static BindingFlags AllBindings { get { return BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static; } } static List GetTypeEventFields(Type t) { if (dicEventFieldInfos.ContainsKey(t)) return dicEventFieldInfos[t]; List lst = new List(); BuildEventFields(t, lst); dicEventFieldInfos.Add(t, lst); return lst; } static void BuildEventFields(Type t, List lst) { //BindingFlags.FlattenHierarchy only works on protected & public, doesn't work because fields are private // Uses .GetEvents and then uses .DeclaringType to get the correct ancestor type so that we can get the FieldInfo. foreach (EventInfo ei in t.GetEvents(AllBindings)) { Type dt = ei.DeclaringType; FieldInfo fi = dt.GetField(ei.Name, AllBindings); if (fi != null) lst.Add(fi); } } static EventHandlerList GetStaticEventHandlerList(Type t, object obj) { MethodInfo mi = t.GetMethod("get_Events", AllBindings); return (EventHandlerList)mi.Invoke(obj, new object[] { }); } public static void RemoveAllEventHandlers(object obj) { RemoveEventHandler(obj, ""); } public static void RemoveEventHandler(object obj, string EventName) { if (obj == null) return; Type t = obj.GetType(); List event_fields = GetTypeEventFields(t); EventHandlerList static_event_handlers = null; foreach (FieldInfo fi in event_fields) { if (EventName != "" && string.Compare(EventName, fi.Name, true) != 0) continue; // STATIC Events have to be treated differently from INSTANCE Events... if (fi.IsStatic) { if (static_event_handlers == null) static_event_handlers = GetStaticEventHandlerList(t, obj); object idx = fi.GetValue(obj); Delegate eh = static_event_handlers[idx]; if (eh == null) continue; Delegate[] dels = eh.GetInvocationList(); if (dels == null) continue; EventInfo ei = t.GetEvent(fi.Name, AllBindings); foreach (Delegate del in dels) ei.RemoveEventHandler(obj, del); } else { EventInfo ei = t.GetEvent(fi.Name, AllBindings); if (ei != null) { object val = fi.GetValue(obj); Delegate mdel = (val as Delegate); if (mdel != null) { foreach (Delegate del in mdel.GetInvocationList()) ei.RemoveEventHandler(obj, del); } } } } } }