using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?si)<div(?=(?:[^>""']|""[^""]*""|'[^']*')*?\sid\s*=\s*(?:(['""])\s*(post-\d+).*?\1))\s+(?:"".*?""|'.*?'|[^>]*?)+>";
string input = @"<div class=""main>
<div id=""post-1111:"">
<div class=junk id=""post-1112:"">
<div id=""post-1113:"" class=junk >
<div class=junk id=""data-1122:"" id=""post-1114:"">
";
RegexOptions options = RegexOptions.Multiline;
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