Regex::Matches Method (String, Int32)
Searches the specified input string for all occurrences of a regular expression, beginning at the specified starting position in the string.
Assembly: System (in System.dll)
- Type: System::String
The string to search for a match.
- Type: System::Int32
The character position in the input string at which to start the search.
The method is similar to the Match(String, Int32) method, except that it returns information about all the matches found in the input string, instead of a single match. It is equivalent to the following code:
The regular expression pattern for which the method searches is defined by the call to one of the Regex class constructors. For more information about the elements that can form a regular expression pattern, see Regular Expression Language - Quick Reference.
The Matches method uses lazy evaluation to populate the returned MatchCollection object. Accessing members of this collection such as MatchCollection::Count and MatchCollection::CopyTo causes the collection to be populated immediately. To take advantage of lazy evaluation, you should iterate the collection by using a construct such as foreach in C# and For Each…Next in Visual Basic.
Because of its lazy evaluation, calling the method does not throw a RegexMatchTimeoutException exception. However, the exception is thrown when an operation is performed on the MatchCollection object returned by this method, if the MatchTimeout property is not Regex::InfiniteMatchTimeout and a matching operation exceeds the time-out interval..
The following example uses the Match(String) method to find the first word in a sentence that ends in "es", and then calls the method to identify any additional words that end in "es".
The regular expression pattern \b\w+es\b is defined as shown in the following table.
Begin the match at a word boundary.
Match one or more word characters.
Match the literal string "es".
End the match at a word boundary.
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
XNA FrameworkSupported in: 3.0, 2.0, 1.0
Portable Class LibrarySupported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8