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POSpell checker in a WPF RichTextBox
 

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  1. POSpell checker in a WPF RichTextBox
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    <p>I have created a <code>RichTextBox</code> text editor as a c# Form application solution. I have added a WPF application to this solution to act as a spellchecker. Basically, when I run the spell checker the contents of the <code>RichTextBox</code> are copied to a WPF <code>RichTextBox</code> in the WPF application which I have configured to look like a spell check dialog. I have included a <code>ListBox</code> which displays the spelling error suggestions and buttons that allow the user to ignore errors or change if one of the suggestions are clicked.</p> <p>The main routine loops through the text in the RichTextBox until it finds a spelling error. The user then has the option to ignore by clicking a button that calls <code>EditingCommands.IgnoreSpellingError</code> or change by clicking a button that calls <code>EditingCommands.CorrectSpellingError</code>. Currently I am using another button to then re-cycle through the <code>RichTextBox</code> to find the next spelling error.</p> <p>Ideally what I would like to happen is, for example, when the ignore button is clicked, the <code>EditingCommands.IgnoreSpellingError</code> is called and then the main routine is run immediately after, like so:</p> <pre><code> private void button3_Click(object sender, RoutedEventArgs e) { button3.Command = EditingCommands.IgnoreSpellingError; button3.CommandTarget = richTextBox1; spellCheckWords(); } </code></pre> <p>However, this does not work as the <code>RichTextBox</code> seems to go out of synchronisation with the spell checker. It's as if the form or the <code>RichTextBox</code> are not refreshing properly. Just to re-iterate, if I use a separate button to re-run the main routine then it works ok.</p> <p>The full <strong>code</strong> is below.</p> <p>Any help would be appreciated.</p> <pre><code>using System; using System.Threading; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.IO; namespace WpfApplication1 { /// &lt;summary&gt; /// Interaction logic for MainWindow.xaml /// &lt;/summary&gt; public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); richTextBox1.SpellCheck.IsEnabled = true; } private void Window_Loaded(object sender, RoutedEventArgs e) { richTextBox1.Paste(); richTextBox1.ContextMenu = GetContextMenu(); spellCheckWords(); } private static int chrPos = 0; private void spellCheckWords() { SpellingError spellingError; TextRange spellErrorRange; TextPointer start_pointer, end_pointer; richTextBox1.ContextMenu = GetContextMenu(); richTextBox1.SelectAll(); int txtLen = richTextBox1.Selection.Text.Length; bool noSpellingErrors = true; ; for (int i = chrPos; i &lt; txtLen; i++) { start_pointer = richTextBox1.Document.ContentStart.GetNextInsertionPosition (LogicalDirection.Forward).GetPositionAtOffset(i, LogicalDirection.Forward); spellingError = richTextBox1.GetSpellingError(start_pointer); if (spellingError != null) { spellErrorRange = richTextBox1.GetSpellingErrorRange(start_pointer); int errRange = spellErrorRange.Text.Length; textBox1.Text = spellErrorRange.Text; noSpellingErrors = true; string textRun = start_pointer.GetTextInRun(LogicalDirection.Forward); string trimmedString = string.Empty; end_pointer = richTextBox1.Document.ContentStart.GetNextInsertionPosition (LogicalDirection.Forward).GetPositionAtOffset(i + errRange, LogicalDirection.Forward); richTextBox1.Selection.Select(start_pointer, start_pointer); richTextBox1.Focus(); Rect screenPos = richTextBox1.Selection.Start.GetCharacterRect(LogicalDirection.Forward); double offset = screenPos.Top + richTextBox1.VerticalOffset; richTextBox1.ScrollToVerticalOffset(offset - richTextBox1.ActualHeight / 2); listBox1.Items.Clear(); foreach (string str in spellingError.Suggestions) { listBox1.Items.Add(str); } //chrPos = i + errRange + 1; return; } } if (noSpellingErrors == true) { textBox1.Text = "No spelling Errors"; listBox1.Items.Clear(); button2.IsEnabled = false; button3.IsEnabled = false; button4.IsEnabled = false; button6.IsEnabled = false; } } private void button1_Click(object sender, RoutedEventArgs e) { richTextBox1.SelectAll(); richTextBox1.Copy(); richTextBox1.Document.Blocks.Clear(); richTextBox1.SpellCheck.IsEnabled = false; this.Close(); } private ContextMenu GetContextMenu() { return null; } private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (listBox1.SelectedItem != null) textBox1.Text = listBox1.SelectedItem.ToString(); } private void button2_Click(object sender, RoutedEventArgs e) { button2.Command = EditingCommands.CorrectSpellingError; button2.CommandParameter = textBox1.Text; button2.CommandTarget = richTextBox1; spellCheckWords(); } private void button3_Click(object sender, RoutedEventArgs e) { button3.Command = EditingCommands.IgnoreSpellingError; button3.CommandTarget = richTextBox1; spellCheckWords(); } private void button4_Click(object sender, RoutedEventArgs e) { spellCheckWords(); } } </code></pre> <p>}</p>
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    1. USDavid E
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    1. COCan you please explain your issue in a little more detail ?
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      1. USBlackKnight
    2. COHi Aviral, I'm not sure how to further explain this. That was one of the reasons why I included the code. If you could tell me what more you need to know I will respond. Bear in mind I am a relative newcomer to c#. David
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    3. COJust one thing,what do you mean by `RichTextBox seems to go out of synchronisation with the spell checker`,what actually happens ?
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