C# - RichTextBox change color of certain words

Question

Possible Duplicate:
How to select text from the RichTextBox and then color it?

I don't really have any code to show, because I don't know :(. I have a server that outputs information with tags. For example:

15:44 [INFO] Loaded Properties
15:45 [ERROR] Properties not found

How do I look in the richtextbox and make all ERROR tags red, INFO tags GREEN, etc.?

The accepted answer on the post I suggested as a duplicate looks to be a very good way of doing what you want — David Hall, Apr 01 '12 at 14:57
System.Text.RegularExpressions; http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.aspx — David Hall, Apr 01 '12 at 15:14
Right click on the method, select resolve. VS will pop it in it for you. — Tony Hopkinson, Apr 01 '12 at 15:15

aKzenT · Answer 1 · 2012-04-01T16:06:54.723

2

I think this should do what you want:

for(int i=0; i<rtb.Lines.Length; i++) 
{ 
   string text = rtb.Lines[i];
   rtb.Select(rtb.GetFirstCharIndexFromLine(i), text.Length); 
   rtb.SelectionColor = colorForLine(text); 
} 

private Color colorForLine(string line)
{
    if(line.Contains("[INFO]", StringComparison.InvariantCultureIgnoreCase) return Color.Green;
    if(line.Contains("[ERROR]", StringComparison.InvariantCultureIgnoreCase) return Color.Red;

    return Color.Black;
}

Edit: Changed StartsWith to Contains

edited Apr 01 '12 at 16:06

answered Apr 01 '12 at 14:52

aKzenT

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@AlexOgden try with `Contains` instead of `StartsWith` – L.B Apr 01 '12 at 15:12
Try setting a breakpoint in colorForLine and see if the conditions get hit – aKzenT Apr 01 '12 at 16:06

score 0 · Answer 2 · edited Apr 01 '12 at 16:17

0

You can do something like:

//will select characters form index 0 to 9
richTextBox1.Select(0, 10);

//will set the characters from 0 to 9 to red
richTextBox1.SelectionColor = Color.Red;

edited Apr 01 '12 at 16:17

LarsTech

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answered Apr 01 '12 at 15:17

Eddard Stark

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Other answer already shows that + it is `SelectionColor` not `SelectionColour` – L.B Apr 01 '12 at 15:22
@EddardStark - or just English as it is known – Matt Wilko Aug 28 '14 at 10:36

C# - RichTextBox change color of certain words

2 Answers2

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