match class : GroupCount getter
Description
Gets a number of groups.
Syntax
matchInstance.GroupCount
Arguments
None
Return value
| Class | Description |
| int | A number of groups. |
Sample code
| 1: | regex pattern = new regex("(\d)(\d)"); // There are groups in the regular expression. |
| 2: | match firstMatch= pattern.MatchM("ww1245cc66"); // It matches to "12". |
| 3: | int count = firstMatch.GroupCount; // The GroupCount is 3. "12", "1", and "2" |
| 4: | // --------------------------------------------------------------------------------- |
| 5: | pattern = new regex("\d\d"); // There is no group in the regular expression. |
| 6: | firstMatch= pattern.MatchM("ww1245cc66"); // It matches to "12". |
| 7: | count = firstMatch.GroupCount; // The GroupCount is 1. The matched substring is also group. |
| 8: | // --------------------------------------------------------------------------------- |
| 9: | firstMatch= pattern.MatchM("wwwwwww"); // It does not match. |
| 10: | count = firstMatch.GroupCount; // Still, the GroupCount is 1. |
Notes
It's a wrapper of the System.Text.RegularExpressions.Match.Groups.Count property.
If the match is successful, the entire matched substring is also recognized as one group, so GroupCount == 1 even if there is no group specified in the regular expression pattern.
Even if the match fails, GroupCount == 1.