using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"<\? # opening tag
[^?\/]* # all that is not a ? or a /
(?:
\/ # a slash:
(?:
(?![\/*]) [^?\/]* # - not followed by a slash or a *
|
\/.*(?:\n[^?\/]*)? # - that starts a single line comment
|
\* # - that starts a multiline comment
[^*]* (?:\*+(?!\/)[^*]*)* # (comment content)
(?:\*\/ [^?\/]* | $) # */ is optional
)
|
\?(?!>) [^?\/]* # a ? not followed by a >
)*
(?:\?>|$) # optional closing tag ?>";
string input = @"<? /* hello */ ?>
html
<? /* world*/ ?>
<? /// ?>
dfgdfgdfg?>
<? /* ?> */ ?>
<? /* unclosed
multiline
comment
works until the end of the string ";
RegexOptions options = RegexOptions.IgnorePatternWhitespace;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx