09 Mei 2012 18:41
Hi, i tried to change the color of text in a wpf ritch box, by getting the color value from a windows forms Colordialog
this is the code behind:
WpfFontColordialog wpfcolor = new WpfFontColordialog(); Color cl = wpfcolor.opendialog();// wpfcolor:class MessageBox.Show("" + cl); TextRange tr = new TextRange(richTextB.Document.ContentStart, richTextB.Document.ContentEnd); tr.ApplyPropertyValue(TextElement.ForegroundProperty,cl);but it didn't work
09 Mei 2012 20:15
1. Rather than it did not work, what did it do?
2. What is WpfFontColordialog and what does it return?
3. What "using" statments are in your codebehind?
09 Mei 2012 21:00WpfFontColordialog is a class wich return the color chosen on an windows forms Colordialog: return Color
09 Mei 2012 21:22
What you need to do is create a SolidColorBrush using the color and use that to set the
09 Mei 2012 22:30
WpfFontColordialog is a class wich return the color chosen on an windows forms Colordialog: return Color
Is it of type System.Drawing.Color or System.Windows.Media.Color?
The WinForms ColorPicker returns System.Drawing.Color type while
WPF deals with Windows.Media.Color.
So before creating a solidcolorbrush you need to create a
Windows.Media.Color for example using
var wpfColor = System.Windows.Media.Color.FromArgb (cl.A, cl.R, cl.G, cl.B); tr.ApplyPropertyValue(TextElement.ForegroundProperty, new SolidColorBrush(wpfColor));
11 Mei 2012 17:03
it is System.Windows.Media.Color;
i tried this code , it work but:
=>the red change to blue
the blue change to red
also, it change all of the text not only the selected part
11 Mei 2012 20:55It's your code that defines the complete document range,
and did you mention selection? :-).
If you want the selection foreground to change
richTextBox1.Selection.ApplyPropertyValue (TextElement.ForegroundProperty, new SolidColorBrush(wpfColor));
You have, however, to clear the color when
the selection has changed.
- Diedit oleh Grecian Developer 11 Mei 2012 21:38
11 Mei 2012 22:45yes i tried this but the problem was, the blue color is considred as a red!!
11 Mei 2012 23:04
Not sure what you mean by that. Are you returning a blue (0,0,255) from the dialog.
Did it work with the entire set of text?
11 Mei 2012 23:22
I wrote a small sample app and I can find no problem with any of the code that has been presented here.
Both the entire contents (as you started) or the Selection both work with the info pulled from the ColorDialog.
In reality the only thing funky about all this is the color conversions made necessary by the terrible (IMHO) implementation of color in dot.net and the fact that the WPF team saw fit not to create WPF common dialogs.
12 Mei 2012 8:15Make sure that in WpfFontColorDialog the conversion from WinForms color
to WPF color is appropriate.
If R and B are interchanged, there's some spot in code that is
- Diedit oleh Grecian Developer 12 Mei 2012 8:27