Searching for words in a string

[Azel Low]

Is there a fast way of finding the number of times a word appears in a string? Eg. String: "How do I search if a words exist in a string" Target Word: "a" Result: 2

[V ktor]

Does this meet your needs? string str = "How do I search if a words exist in a string"; MatchCollection mc = Regex.Matches(str, " a "); Console.WriteLine(mc.Count.ToString()); or perhaps... string str = "How do I search if a words exist in a string"; int index = str.IndexOf(" a "); int numWords = 0; while(index != -1) { index = str.IndexOf(" a ", index + 1); numWords++; } Console.WriteLine(numWords.ToString());

[Azel Low]

V|ktor wrote: string str = "How do I search if a words exist in a string"; MatchCollection mc = Regex.Matches(str, " a "); Console.WriteLine(mc.Count.ToString()); Thank You! This worked great for me. Here's a 5. ;)

[mav northwind]

Just a little addition: V|ktor's solution will find the word only if it's surrounded by spaces. If you use @"\ba\b" instead, then the RE will match 'a' at the beginning or the end of the string, too. If you haven't done yet I suggest you read through this excellent tutorial: The 30 Minute Regex Tutorial [^] Regards, mav

[Azel Low]

Thanks mav.northwind! :) I was just testing V|ktor's code and was wondering abt Casing and the Spaces too.