C# WPF Textblock different font color per line

Question

I am trying to make each line of text on a WPF textblock display in a different color. I have the following code which makes the entire block's font color purple because that's the last color it's set to. How can I make it so each potion is displayed in a different color?

    private void btnShowPotions_Click(object sender, RoutedEventArgs e) {

        tbPotionInfo.Foreground = Brushes.Green;
        tbPotionInfo.Text = smallPotion.Name + "(" + smallPotion.AffectValue + ")\r\n";
        tbPotionInfo.Foreground = Brushes.Blue;
        tbPotionInfo.Text += mediumPotion.Name + "(" + mediumPotion.AffectValue + ")\r\n";
        tbPotionInfo.Foreground = Brushes.Red;
        tbPotionInfo.Text += largePotion.Name + "(" + largePotion.AffectValue + ")\r\n";
        tbPotionInfo.Foreground = Brushes.Purple;
        tbPotionInfo.Text += extremePotion.Name + "(" + extremePotion.AffectValue + ")\r\n";
    }

Take a look at this http://www.wpf-tutorial.com/basic-controls/the-textblock-control-inline-formatting/ - specifically the section named RUN and SPAN. — Marek M., Mar 04 '16 at 06:59
use richtextbox and set it to readonly , or you have to setup textblock with one textbox for each color — Thorarins, Mar 04 '16 at 07:00
@Thorarins you're wrong - with the usage of `Run`s or `Span`s he will be working with one `TextBlock` only. Besides - `RichTextBox` is reaaaaally slow and laggy. Have you actually tried to use it in your apps? — Marek M., Mar 04 '16 at 07:02
@Gopichandar I saw runs in a similar and question and am not sure how to implement them because the text isn't generated until the button is clicked my Xaml doesn't have any runs to edit. — kalenpw, Mar 04 '16 at 07:03
@SzwornyDziach Thank you. For completeness sake if you post that as an answer I'll accept it. I used the syntax here for adding runs programmatically http://stackoverflow.com/questions/10906539/how-to-assign-a-run-to-a-text-property-programmatically — kalenpw, Mar 04 '16 at 07:06
@SzwornyDziąch yes richtextbox is a bit slow. but run is messy and makes the code hard to maintain — Thorarins, Mar 04 '16 at 07:10

score 9 · Accepted Answer · answered Mar 04 '16 at 07:06

You can make use of Run.

Here is the sample of how to use the Run

Run run = new Run(smallPotion.Name + "(" + smallPotion.AffectValue + ")\r\n");
run.Foreground = Brushes.Green;
tbPotionInfo.Inlines.Add(run);   

run = new Run(mediumPotion.Name + "(" + mediumPotion.AffectValue + ")\r\n");
run.Foreground = Brushes.Blue;
tbPotionInfo.Inlines.Add(run);        
...

Haven't verified but I hope it will help you.

score 4 · Answer 2 · answered Mar 04 '16 at 07:07

4

Use textblock like this

<TextBlock>
      <TextBlock Name="tbSmallPotion" Foreground="Green"/
      <TextBlock Text="tbMediumPotion"Foreground="Blue"/>
 </TextBlock>

and set the values

tbSmallPotion.Text = smallPotion.Name + "(" + smallPotion.AffectValue + ")\r\n";
tbMediumPotion.Text = mediumPotion.Name + "(" + mediumPotion.AffectValue + ")\r\n";

answered Mar 04 '16 at 07:07

Thorarins

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Yes this would work, I ended up going with Gopichandar's solution for the simplicity of having one textblock. – kalenpw Mar 04 '16 at 07:09

C# WPF Textblock different font color per line

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