Regex Pattern for comment lines of C# code?

I want to colorize comments shown in RTB in the three formats :

1-

PHP Code:

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/*
 *This is a comment 
*/ 


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2-

PHP Code:

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//This is comment 
// 


---

3-

PHP Code:

---

///This is function description 


---

I want only the regex pattern . Thanks guys .

check this link pirate mate , it's perl ( Syntax highlighting C# code ) , but it's not to hard to follow ...
Using Perl to Syntax Color C#

Thanks , I'll check it out and see if I can do something with it . :)

I couldn't figure out the pattern for comment in that link.:(

*bump*

ok here's a quick example i knocked up for the /* comment */ type of comments @"[/*]\s*([^"">]+)\s*[*/]\s*[/]" being the pattern ...

VB Code:

[color=blue]private void[/color] richTextBox1_TextChanged([color=blue]object[/color] sender, System.EventArgs e) 
        { 
            Regex rgx=[color=blue]new[/color] Regex(@"[/*]s*([^"">]+)s*[*/]s*[/]" , RegexOptions.IgnoreCase); 
            MatchCollection mCol=rgx.Matches(richTextBox1.Text); 
            [color=blue]foreach[/color](Match m [color=blue]in[/color] mCol) 
            { 
                richTextBox1.HideSelection=[color=blue]true[/color]; 
                richTextBox1.Select(m.Index , m.Length); 
                richTextBox1.SelectionColor=Color.Green; 
                richTextBox1.SelectionStart=m.Index + m.Length; 
                richTextBox1.SelectionLength=0; 
            } 
        }

for the // comments it's @"[//]\s*([^"">]+)\s*[\n]" ...

VB Code:

[color=blue]private void[/color] richTextBox1_TextChanged([color=blue]object[/color] sender, System.EventArgs e) 
        { 
            Regex rgx=[color=blue]new[/color] Regex(@"[//]s*([^"">]+)s*[\n]" , RegexOptions.IgnoreCase); 
            MatchCollection mCol=rgx.Matches(richTextBox1.Text); 
            [color=blue]foreach[/color](Match m [color=blue]in[/color] mCol) 
            { 
                richTextBox1.HideSelection=[color=blue]true[/color]; 
                richTextBox1.Select(m.Index , m.Length); 
                richTextBox1.SelectionColor=Color.Green; 
                richTextBox1.SelectionStart=m.Index + m.Length; 
                richTextBox1.SelectionLength=0; 
            } 
        }

hope it helps mate :wave:

That did the trick 80% correct except this :

line of code here //this is comment
another code here


the second line "another code here" is considered to be comment also but actually it's code .
1-How can I fix this ?
2-It skip these "#region" and this " /// <summary>....<summary/>.

Thanks so far , dude .

you need to set the selectioncolor back to it's default ( eg: Color.Black ) after highlighting , also it's better under a button click or a void rather than the text changed area.

PHP Code:

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        private void button1_Click(object sender, System.EventArgs e)
        {
            Regex rgx=new Regex(@"[//]\s*([^"">]+)\s*[\n]" , RegexOptions.IgnoreCase);
            MatchCollection mCol=rgx.Matches(richTextBox1.Text);
            foreach(Match m in mCol)
            {
                richTextBox1.HideSelection=true;
                richTextBox1.Select(m.Index , m.Length);
                richTextBox1.SelectionColor=Color.Green;
                richTextBox1.SelectionStart=m.Index + m.Length;
                richTextBox1.SelectionLength=0;
                richTextBox1.SelectionColor=Color.Black; // revert the text back to it's default color.
            }
        } 


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I'll check this when I get home....:D

Thanks a lot , that seems working now . One more

2-It skip these "#region" and this " /// <summary>....<summary/>.

??

hello mate. i just make something similar but won't work with

PHP Code:

---

/* this is a comment
 */ 


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this is what i've got

PHP Code:

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      private void button1_Click(object sender, System.EventArgs e)
      {
         Regex rgx=new Regex(@"(//.*[\n])|(///.*[\n])|(#region.*[\n])|(/\*.*?\*/)" ,
            RegexOptions.IgnoreCase);
         MatchCollection mCol=rgx.Matches(richTextBox1.Text);
         foreach(Match m in mCol)
         {
            richTextBox1.HideSelection=true;
            richTextBox1.Select(m.Index , m.Length);
            richTextBox1.SelectionColor=Color.Green;
            richTextBox1.SelectionStart=m.Index + m.Length;
            richTextBox1.SelectionLength=0;
            richTextBox1.SelectionColor=Color.Black; // revert the text back to it's default color.
         }
      } 


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still missing C style comment [multiline]. any ideas?

halu mate. got it. but still i don't know if this efficient. lol

Code:

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        Regex rgx=new Regex(@"(//.*[\n])|(///.*[\n])|"+
            @"(#region.*[\n])|(/\*.*?\*/)|(/\*[^""]*\*/)" ,
            RegexOptions.IgnoreCase);

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Quote:

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Originally posted by brown monkey
halu mate. got it. but still i don't if this efficient. lol

PHP Code:

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         Regex rgx=new Regex(@"(//.*[\n])|(///.*[\n])|"+
            @"(#region.*[\n])|(/\*.*?\*/)|(/\*[^""]*\*/)" ,
            RegexOptions.IgnoreCase); 


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I tried to include the xor case in the regex pattern and it slowed things incredibly . When I get home I'll try to work it out!