Question

I have a long string in C# and i need to find substrings that look like this:

number.number:number

For example this string:

text text
965.435:001 text text sample
7854.66:006 text text

I want to find and save 965.435:001 and 7854.66:006 to a string somehow.

Answer 1

• \d means “digit”
• + means “one or more”
• \. means a literal dot (. alone would mean “any character”)
• \b means “word boundary” (start or end of an alphanumeric “word”).

So, your regex would be

\b\d+\.\d+:\d+\b

In C#:

MatchCollection allMatchResults = null;
Regex regexObj = new Regex(@"\b\d+\.\d+:\d+\b");
allMatchResults = regexObj.Matches(subjectString);
if (allMatchResults.Count > 0) {
    // Access individual matches using allMatchResults.Item[]
} else {
    // Match attempt failed
}