CODEWITHSUNDEEP
c#wpfutf-8character-encoding
GuillaumeA
GuillaumeA

Reputation: 3545

Encoding text in RichTextBox from the WPF toolkit

I'd like to write some text in a RichTextBox from the WPF toolkit with the degree (°) sign.

I simply tried 

Section section = new Section();
Paragraph paragraph = new Paragraph();
section.Blocks.Add(paragraph);
string str = string.Format("Temperature : {0:0.00}°C", temp);
text = new Run(str);
paragraph.Inlines.Add(text);
TemperatureText = System.Windows.Markup.XamlWriter.Save(section);

But the degree sign is replaced with a "?". I also tried to directly write the unicode string.Format("Temperature : {0:0.00}\u00B0C", temp) but it also failed.

Do you have any idea ? Thanks !

[EDIT]

I'm using the XamlFormatter for the RichTextBox

Upvotes: 2

Views: 2044

Answers (1)

rPulvi
rPulvi

Reputation: 946

Try implementing your own formatter, that acts like the XAMLFormatter but using UTF8 Encoding:

public class MyXamlFormatter : ITextFormatter
{
    public string GetText( System.Windows.Documents.FlowDocument document )
    {
      TextRange tr = new TextRange( document.ContentStart, document.ContentEnd );
      using( MemoryStream ms = new MemoryStream() )
      {
        tr.Save( ms, DataFormats.Xaml );
        return Encoding.UTF8.GetString(ms.ToArray());
      }
    }

    public void SetText( System.Windows.Documents.FlowDocument document, string text )
    {
      try
      {
        if( String.IsNullOrEmpty( text ) )
        {
          document.Blocks.Clear();
        }
        else
        {
          TextRange tr = new TextRange( document.ContentStart, document.ContentEnd );
          using( MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(text)))
          {
            tr.Load( ms, DataFormats.Xaml );
          }
        }
      }
      catch
      {
        throw new InvalidDataException( "Data provided is not in the correct Xaml format." );
      }
    }
}

So, in your XAML:

<wtk:RichTextBox.TextFormatter>
    <myNameSpace:MyXamlFormatter/>
</wtk:RichTextBox.TextFormatter>

It should works.

Upvotes: 1

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