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| public class RichTextBoxEx : RichTextBox
{
// Constants ==========================================================
private const string ContentPropertyName = "Content";
// Attributes =========================================================
public static readonly DependencyProperty ContentProperty =
DependencyProperty.Register(ContentPropertyName, typeof(String), typeof(RichTextBoxEx),
new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, ContentChanged, null, true, System.Windows.Data.UpdateSourceTrigger.Explicit));
public static bool isNewContent;
// Properties =========================================================
public string Content
{
get { return (string) this.GetValue(ContentProperty); }
set { this.SetValue(ContentProperty, value); }
}
// Constructor ========================================================
public RichTextBoxEx()
{
isNewContent = true;
this.LostFocus += new RoutedEventHandler(RichTextBoxEx_LostFocus);
}
// Events Handling ====================================================
void RichTextBoxEx_LostFocus(object sender, RoutedEventArgs e)
{
isNewContent = false;
this.Content = this.GetRtf();
isNewContent = true;
}
// Methods ============================================================
private static void ContentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (isNewContent && d is RichTextBoxEx)
{
// BindingExpression be = this.GetBindingExpression(ContentProperty);
// be.UpdateSource();
((RichTextBoxEx)d).SetRtf((string)e.NewValue);
}
}
private void SetTextRange(string content, string dataFormat)
{
TextRange textRange = new TextRange(this.Document.ContentStart, this.Document.ContentEnd);
using (MemoryStream memoryStream = new MemoryStream())
{
using (StreamWriter streamWriter = new StreamWriter(memoryStream))
{
streamWriter.Write(content);
streamWriter.Flush();
memoryStream.Seek(0, SeekOrigin.Begin);
//Load the MemoryStream into TextRange ranging from start to end of RichTextBox.
textRange.Load(memoryStream, dataFormat);
}
}
}
public void Clear()
{
this.Document.Blocks.Clear();
}
public void SetText(string content)
{
SetTextRange(content, DataFormats.Text);
}
public string GetText()
{
// Use a TextRange to fish out the Text from the Document
return new TextRange(this.Document.ContentStart, this.Document.ContentEnd).Text;
}
public void SetRtf(string content)
{
SetTextRange(content, DataFormats.Rtf);
}
public string GetRtf()
{
string rtf;
TextRange sourceDocument = new TextRange(this.Document.ContentStart, this.Document.ContentEnd);
using (MemoryStream stream = new MemoryStream())
{
sourceDocument.Save(stream, DataFormats.Rtf);
stream.Seek(0, SeekOrigin.Begin);
using (StreamReader reader = new StreamReader(stream))
{
rtf = reader.ReadToEnd();
}
}
return rtf;
}
public void SaveRtf(string filename)
{
TextRange range = new TextRange(this.Document.ContentStart, this.Document.ContentEnd);
using (FileStream fileStream = new FileStream(filename, FileMode.Create))
{
range.Save(fileStream, DataFormats.Rtf);
fileStream.Close();
}
}
} |
