Wpf RichTextBox

Question

wouild like the abilty of copying in to wpf richtextbox an url address and being able to click same to go to wb page. Have searched and tried various work around but none very good Thank you Peter

Adarsh Nigam · Answer

Step 1: Create a New WPF Application Open Visual Studio. Create a new WPF Application project. Step 2: Add a RichTextBox to Your XAML In your MainWindow.xaml  add a RichTextBox : xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentation xmlns:x=http://schemas.microsoft.com/winfx/2006/xaml Title=MainWindow Height=350 Width=525> Step 3: Code Behind to Detect and Convert URLs In your MainWindow.xaml.cs  add the logic to detect and convert URLs into clickable hyperlinks: using System.Text.RegularExpressions; using System.Windows; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; namespace YourNamespace { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); richTextBox.PreviewKeyDown += RichTextBox_PreviewKeyDown; } private void RichTextBox_PreviewKeyDown(object sender KeyEventArgs e) { if (e.Key == Key.V && (Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control) { e.Handled = true; PasteAndConvertUrls(); } } private void PasteAndConvertUrls() { var textRange = new TextRange(richTextBox.Document.ContentEnd richTextBox.Document.ContentEnd); textRange.Text = Clipboard.GetText(); ConvertUrlsToHyperlinks(richTextBox.Document); } private void ConvertUrlsToHyperlinks(FlowDocument document) { var text = new TextRange(document.ContentStart document.ContentEnd).Text; var regex = new Regex(@(http|https):\/\/[^\s/$.?#].[^\s]* RegexOptions.IgnoreCase); var matches = regex.Matches(text); foreach (Match match in matches) { var hyperlink = new Hyperlink { NavigateUri = new Uri(match.Value) Foreground = Brushes.Blue }; hyperlink.Inlines.Add(match.Value); hyperlink.RequestNavigate += Hyperlink_RequestNavigate; var start = document.ContentStart; while (start != null && start.CompareTo(document.ContentEnd) { if (start.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text) { var textRun = start.GetTextInRun(LogicalDirection.Forward); var index = textRun.IndexOf(match.Value); if (index >= 0) { var selectionStart = start.GetPositionAtOffset(index LogicalDirection.Forward); var selectionEnd = selectionStart.GetPositionAtOffset(match.Value.Length LogicalDirection.Forward); var textRange = new TextRange(selectionStart selectionEnd); textRange.Text = string.Empty; var inlineContainer = new InlineUIContainer(hyperlink); selectionStart.InsertTextInRun(match.Value); selectionStart.Parent.InsertAfter(inlineContainer selectionStart); break; } } start = start.GetNextContextPosition(LogicalDirection.Forward); } } } private void Hyperlink_RequestNavigate(object sender System.Windows.Navigation.RequestNavigateEventArgs e) { System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(e.Uri.AbsoluteUri) { UseShellExecute = true }); e.Handled = true; } } } ------------------------------------------------ ---------------------------------------------------------- Explanation Handling Paste Event : RichTextBox_PreviewKeyDown : This event handler detects when the user pastes text (Ctrl+V) into the RichTextBox . It then calls PasteAndConvertUrls . Pasting and Converting URLs : PasteAndConvertUrls : This method pastes the clipboard text into the RichTextBox and calls ConvertUrlsToHyperlinks to convert URLs to hyperlinks. Converting Text to Hyperlinks : ConvertUrlsToHyperlinks : This method uses a regular expression to find URLs in the text and converts them into Hyperlink elements. The Hyperlink elements are then added to the RichTextBox . Handling Hyperlink Clicks : Hyperlink_RequestNavigate : This event handler opens the URL in the default web browser when the hyperlink is clicked. ------------------------------------------------ ---------------------------------------------------------- By following these steps you can enable pasting URLs into a WPF RichTextBox and making them clickable to navigate to the respective web pages.

Adarsh Nigam · Answer

PLease let me know if anything else required. I'd be happy to help.