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How Do I...Get all matches for a pattern



Regular Expressions are often useful when trying to retrieve small portions of text from a large document, result set, or when filtering a stream. The MatchCollection object contains all valid Match objects for a given regular expression after a successful match occurs.

Regex digitregex = new Regex("(?<number>\\d+)"); String s = "abc 123 def 456 ghi 789"; ... MatchCollection ms = digitregex.Matches(s); Dim DigitRegex As Regex = New Regex("(?<number>\d+)") Dim S As String = "abc 123 def 456 ghi 789" ... Dim Mc As MatchCollection = DigitRegex.Matches(S) Regex * digitregex = new Regex(S"(?\\d+)"); String * s = S"abc 123 def 456 ghi 789"; ... MatchCollection * mc = digitregex->Matches(s);

The following example illustrates how to create a Regex that matches numbers in a string. The Matches method is callled to return a MatchCollection. If the Count property equals 0, no successful matches have occured. If there are matches, the results of each are displayed.

Example