Is there a function that returns index where RegEx match starts?

Question

I have strings of 15 characters long. I am performing some pattern matching on it with a regular expression. I want to know the position of the substring where the IsMatch() function returns true.

Question: Is there is any function that returns the index of the match?

Answer 1

For multiple matches you can use code similar to this:

Regex rx = new Regex("as"); foreach (Match match in rx.Matches("as as as as")) {     int i = match.Index; } 

Answer 2

Use Match instead of IsMatch:

    Match match = Regex.Match("abcde", "c");     if (match.Success)     {         int index = match.Index;         Console.WriteLine("Index of match: " + index);     } 

Output:

Index of match: 2