using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?!.*\R\[\d)\[([\d :.-]+)]ERROR.*?(F:\S*)(?sx).*?\b([a-zA-Z]*Exception)\b";
string input = @"[2020-03-07 01:02:37.512]ERROR [L:xx F:yy T:zz R: C: ] xxxxxxx xxxxx xxxx xxxx NullPointerException
at com.package.name(b.java:20)
at com.package.name.someClass.someMethod(P.java:2423)
at com.package.name.someClass.someMethod(P.java:40)
at com.package.name.someClass.someMethod(P.java:4054)
[2020-03-07 01:02:37.512]ERROR [L:xx F:yy T:zz R: C: ] xxxxxxx xxxxx xxxx xxxxxxxx xxxxxxxxxxxxxxxx
xxxxxxxxx xxxxxxxxxxx xxxxxxxx xxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxx xxxx NullPointerException
at com.package.name(b.java:20)
at com.package.name.someClass.someMethod(P.java:2423)
at com.package.name.someClass.someMethod(P.java:40)
at com.package.name.someClass.someMethod(P.java:4054)
[2020-03-07 01:02:37.512]ERROR [L:xx F:yy1 T:zz1 R: C: ] xxxxxxx xxxxx xxxx xxxx
[2020-03-07 01:03:37.512]ERROR [L:xx F:yy2 T:zz2 R: C: ] xxxxxxx xxxxx xxxx xxxx
[2020-03-07 01:04:37.512]ERROR [L:xx F:yy3 T:zz3 R: C: ] xxxxxxx xxxxx xxxx xxxx
[2020-03-07 01:05:37.512]ERROR [L:xx F:yy4 T:zz5 R: C: ] NullPointerException
at com.package.name(b.java:20)
at com.package.name.someClass.someMethod(P.java:2423)
at com.package.name.someClass.someMethod(P.java:40)
at com.package.name.someClass.someMethod(P.java:4054)";
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