Merge pull request syncfusion-content#118 from Syncfusion-Content/development

SyncfusionBuild · web-flow · commit 13a15b9edeea · 2022-01-31T12:00:38.000+05:30
DOCINFRA-2341_merged_using_automation
diff --git a/wpf-toc.html b/wpf-toc.html
@@ -1439,6 +1439,7 @@
             <li><a href="/wpf/Pdf-Viewer/overview">Overview</a></li>
             <li><a href="/wpf/Pdf-Viewer/getting-started">Getting Started</a></li>
 			<li><a href="/wpf/Pdf-Viewer/pdf-rendering-engines">PDF Rendering Engines</a></li>
+			<li><a href="/wpf/Pdf-Viewer/text-extraction-engines">Text Extraction Engines</a></li>
             <li><a href="/wpf/Pdf-Viewer/viewing-pdf-files">Viewing PDF Files</a></li>
 			<li><a href="/wpf/Pdf-Viewer/password-protected-pdf-files">Viewing Password protected PDF Files</a></li>
             <li><a href="/wpf/Pdf-Viewer/printing-pdf-files">Printing PDF Files</a></li>			
diff --git a/wpf/Pdf-Viewer/Concept-and-Features_images/wpf-pdf-viewer-concept-and-features.png b/wpf/Pdf-Viewer/Concept-and-Features_images/wpf-pdf-viewer-concept-and-features.png
diff --git a/wpf/Pdf-Viewer/Concept-and-Features_images/wpf-pdf-viewer-search-text.png b/wpf/Pdf-Viewer/Concept-and-Features_images/wpf-pdf-viewer-search-text.png
diff --git a/wpf/Pdf-Viewer/Redaction.md b/wpf/Pdf-Viewer/Redaction.md
@@ -11,6 +11,8 @@ documentation: ug
 
 Redaction support allows you to remove sensitive/confidential information in text, images, and graphics from a PDF document.
 
+N> From version 19.4.0.48, we have updated our default text extraction engine to PDFium for extracting text information from PDF documents. Based on the text information, we redact text in the PDF documents
+
 ## Enable redaction mode
 
 The following code shows how to switch to redaction mode in code behind.
diff --git a/wpf/Pdf-Viewer/Searching-Text.md b/wpf/Pdf-Viewer/Searching-Text.md
@@ -1,61 +1,55 @@
 ---
 layout: post
-title: Searching Text in WPF Pdf Viewer control | Syncfusion
+title: Search text in PDF files using WPF PDF Viewer | Syncfusion
 description: Learn about Searching Text support in Syncfusion Essential Studio WPF Pdf Viewer control, its elements and more.
 platform: wpf
 control: PDF Viewer
 documentation: ug
 ---
 
-# Searching Text in WPF Pdf Viewer
+# Search text in PDF files using WPF PDF Viewer
 
-Essential PDF Viewer allows you to search and highlight the text in the PDF document. The search box appears when Ctrl+F is pressed and searches the text in the PDF document as displayed in the following screenshot.
+The WPF PDF Viewer allows you to search and highlight the text in the PDF files. The search box appears when Ctrl+F is pressed and searches the text in the PDF document as displayed in the following screenshot.
 
-![WPF PDF Viewer Concept and Features](Concept-and-Features_images/wpf-pdf-viewer-concept-and-features.png)
+![Search Text using WPF PDF Viewer](Concept-and-Features_images/wpf-pdf-viewer-search-text.png)
 
-N>
-* PdfDocumentView is used to view the PDF documents without the toolbar. So, make use of PdfViewerControl to search the text using search box.
+N> [PdfDocumentView](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfDocumentView.html) is used to view the PDF documents without the toolbar. So, make use of [PdfViewerControl](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html) to search the text using search box.
 
-The PDF Viewer control also supports searching text in the PDF document using the following API. The [FindText](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html#Syncfusion_Windows_PdfViewer_PdfViewerControl_FindText_System_String_System_Collections_Generic_Dictionary_System_Int32_System_Collections_Generic_List_System_Drawing_RectangleF____) method returns true when the text given is found in the document. The dictionary contains the page index and the list of rectangular coordinates of the text found in that page. The following code example explains how text search can be achieved after [creating the control from the code](https://help.syncfusion.com/wpf/pdf-viewer/getting-started#creating-pdfviewercontrol-from-code) and handled in the Loaded event of the [application's MainWindow](https://docs.microsoft.com/en-us/dotnet/api/system.windows.application.mainwindow?view=netframework-4.8).
+## Search text in PDF programmatically
+
+The WPF PDF Viewer also supports searching text in the PDF programmatically using the following API. The [FindText](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html#Syncfusion_Windows_PdfViewer_PdfViewerControl_FindText_System_String_System_Collections_Generic_Dictionary_System_Int32_System_Collections_Generic_List_System_Drawing_RectangleF____) method returns true when the text given is found in the document. The dictionary contains the page index and the list of rectangular coordinates of the text found in that page. The following code example explains how text search can be achieved after [creating the control from the code](https://help.syncfusion.com/wpf/pdf-viewer/getting-started#creating-pdfviewercontrol-from-code) and handled in the Loaded event of the [application's MainWindow](https://docs.microsoft.com/en-us/dotnet/api/system.windows.application.mainwindow?view=netframework-4.8).
 
 {% tabs %}
 {% highlight c# %}
-private void Window_Loaded(object sender, RoutedEventArgs e)
-{
-
-	bool IsMatchFound;
-
-	//Load the PDF.
-
-	pdfViewerControl1.Load("../../Data/Barcode.pdf");
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            bool isMatchFound;
 
-	//Get the occurrences of the target text and location.
+            //Load the PDF.
+            pdfViewer.Load("../../Data/Barcode.pdf");
 
-	Dictionary<int, List<RectangleF>> 
+            //Get the occurrences of the target text and location.
+            Dictionary<int, List<RectangleF>> textSearch = new Dictionary<int, List<RectangleF>>();
 
-          textSearch = new Dictionary<int, List<RectangleF>>();
-
-	IsMatchFound = pdfViewerControl1.FindText("targetText", out textSearch);
-
-}
+            isMatchFound = pdfViewer.FindText("targetText", out textSearch);
+        }
 
 {% endhighlight %}
-
 {% highlight vbnet %}
 
 Private Sub Window_Loaded(sender As Object, e As RoutedEventArgs)
 
-	Dim IsMatchFound As Boolean
+	Dim isMatchFound As Boolean
 
 	'Load the PDF.
 
-	pdfViewerControl1.Load("../../Data/Barcode.pdf")
+	pdfViewer.Load("../../Data/Barcode.pdf")
 
 	'Get the occurrences of the target text and location.
 
 	Dim textSearch As New Dictionary(Of Integer, List(Of RectangleF))()
 
-	IsMatchFound = pdfViewerControl1.FindText("targetText", textSearch)
+	isMatchFound = pdfViewer.FindText("targetText", textSearch)
 
 End Sub
 
diff --git a/wpf/Pdf-Viewer/Select-and-copy-text.md b/wpf/Pdf-Viewer/Select-and-copy-text.md
@@ -1,19 +1,31 @@
 ---
 layout: post
-title: Select and Copy Text in WPF Pdf Viewer control | Syncfusion
+title: Select and Copy Text in PDF files using WPF PDF Viewer | Syncfusion
 description: Learn about Select and Copy Text support in Syncfusion Essential Studio WPF Pdf Viewer control, its elements and more.
 platform: wpf
 control: PDF Viewer
 documentation: ug
 ---
 
-# Select and Copy Text in WPF Pdf Viewer
+# Select and Copy Text in PDF files using WPF PDF Viewer
 
 In PDF Viewer, text can be selected by clicking the mouse left button and dragging the mouse pointer over the text in any direction.
 
+N> From version 19.4.0.48, we have updated our default text extraction engine to PDFium for extracting text information from PDF documents. Based on the text information, we select text in the PDF documents.
+
 ## Detecting the completion of text selection
 
-When the text selection is completed, the [TextSelectionCompleted](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html) event will be raised. The selected text can be retrieved as string from the `args` parameter of the event handler.
+When the text selection is completed, the [TextSelectionCompleted](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html) event will be raised. Refer to the following code snippet for wiring the event.
+
+{% tabs %}
+{% highlight c# %}
+
+pdfViewer.TextSelectionCompleted += PdfViewer_TextSelectionCompleted;
+
+{% endhighlight %}
+{% endtabs %}
+
+The selected text can be retrieved as string from the [TextSelectionCompletedEventArgs](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.TextSelectionCompletedEventArgs.html) of the event handler.
 
 {% tabs %}
 {% highlight c# %}
@@ -22,7 +34,7 @@ private void PdfViewer_TextSelectionCompleted(object sender, TextSelectionComple
 {
       //Get the whole selected text 
       string selectedText = args.SelectedText;
-      //Get the selected text and its rectangular bounds for each page separately if the          selection is made on multiple pages 
+      //Get the selected text and its rectangular bounds for each page separately if the selection is made on multiple pages 
       Dictionary<int, Dictionary<string, Rectangle>> selectedTextInformation = args.SelectedTextInformation; 
 }
 
@@ -35,7 +47,6 @@ The selected text can be copied by clicking the copy from the context menu, whic
 
 ![WPF PDF Viewer Copying the Selected Text](Select_and_copy_text_images/wpf-pdf-viewer-copying-the-selected-text.png)
 
-The selected text can also be copied using the keyboard shortcut Ctrl + C.
-
+The selected text can also be copied using the keyboard shortcut `Ctrl + C`.
 
 N> You can refer to our [WPF PDF Viewer](https://www.syncfusion.com/wpf-controls/pdf-viewer) feature tour page for its groundbreaking feature representations. You can also explore our [WPF PDF Viewer example](https://github.com/syncfusion/wpf-demos) to know how to render and configure the pdfviewer.
diff --git a/wpf/Pdf-Viewer/Select_and_copy_text_images/wpf-pdf-viewer-copying-the-selected-text.png b/wpf/Pdf-Viewer/Select_and_copy_text_images/wpf-pdf-viewer-copying-the-selected-text.png
diff --git a/wpf/Pdf-Viewer/Working-with-Annotations/Highlight-Annotation.md b/wpf/Pdf-Viewer/Working-with-Annotations/Highlight-Annotation.md
@@ -17,6 +17,8 @@ To enable the mode from UI, click the below icon in the default toolbar of [PdfV
 
 If you are using [PdfDocumentView](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfDocumentView.html) control, or your own toolbar, or if you want enable the mode programmatically, change the [AnnotationMode](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html#Syncfusion_Windows_PdfViewer_PdfViewerControl_AnnotationMode) property of PDF Viewer to **Highlight**, as shown in the below code example.
 
+N> From version 19.4.0.48, we have updated our default text extraction engine to PDFium for extracting text information from PDF documents. Based on the text information, we create text markup annotations in the PDF documents.
+
 {% tabs %}
 {% highlight C# %}
 
diff --git a/wpf/Pdf-Viewer/Working-with-Annotations/Strikethrough-Annotation.md b/wpf/Pdf-Viewer/Working-with-Annotations/Strikethrough-Annotation.md
@@ -17,6 +17,8 @@ To enable the mode from UI, click the below icon in the default toolbar of [PdfV
 
 If you are using [PdfDocumentView](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfDocumentView.html) control, or your own toolbar, or if you want enable the mode programmatically, change the [AnnotationMode](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html#Syncfusion_Windows_PdfViewer_PdfViewerControl_AnnotationMode) property of PDF Viewer to **Strikethrough**, as shown in the below code example.
 
+N> From version 19.4.0.48, we have updated our default text extraction engine to PDFium for extracting text information from PDF documents. Based on the text information, we create text markup annotations in the PDF documents.
+
 {% tabs %}
 {% highlight C# %}
 
diff --git a/wpf/Pdf-Viewer/Working-with-Annotations/Underline-Annotation.md b/wpf/Pdf-Viewer/Working-with-Annotations/Underline-Annotation.md
@@ -17,6 +17,8 @@ To enable the mode from UI, click the below icon in the default toolbar of [PdfV
 
 If you are using [PdfDocumentView](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfDocumentView.html) control, or your own toolbar, or if you want enable the mode programmatically, change the [AnnotationMode](https://help.syncfusion.com/cr/wpf/Syncfusion.Windows.PdfViewer.PdfViewerControl.html#Syncfusion_Windows_PdfViewer_PdfViewerControl_AnnotationMode) property of PDF Viewer to **Underline**, as shown in the below code example.
 
+N> From version 19.4.0.48, we have updated our default text extraction engine to PDFium for extracting text information from PDF documents. Based on the text information, we create text markup annotations in the PDF documents.
+
 {% tabs %}
 {% highlight C# %}
 
diff --git a/wpf/Pdf-Viewer/text-extraction-engines.md b/wpf/Pdf-Viewer/text-extraction-engines.md
@@ -0,0 +1,25 @@
+---
+layout: post
+title: Text Extraction Engines in WPF Pdf Viewer control | Syncfusion
+description: Learn about Text Extraction Engines supported in Syncfusion Essential Studio WPF Pdf Viewer control, its elements and more.
+platform: wpf
+control: PDF Viewer
+documentation: ug
+---
+
+# Text Extraction Engines in WPF Pdf Viewer
+
+Syncfusion WPF PDF Viewer extracts text information from PDF files through two different engines for performing text search, text selection, creating text markups and more.
+
+* PDFium (Google Chrome’s text extraction engine)
+* SfPdf (Syncfusion’s own text extraction engine)
+
+Before version 19.4.0.48, we used our own text extraction engine (SfPdf) to perform text-based operations in the PDF pages. We have updated our default text extraction engine to PDFium from version 19.4.0.48. The PDFium text extraction engine is recommended for improved performance. However, you may still use our old text extraction engine by setting the `TextExtractionEngine` property to `SfPdf`. Refer to the following code snippet to apply the same.
+
+{% tabs %}
+{% highlight c# %}
+
+pdfViewer.TextExtractionEngine = PdfTextExtractionEngine.SfPdf;
+
+{% endhighlight %}
+{% highlight vbnet %}
