String substring function

Question

How can i get the string within a parenthesis with a custom function?

e.x. the string "GREECE (+30)" should return "+30" only

Answer 1

For the general problem, I'd suggest using Regex. However, if you are sure about the format of the input string (only one set of parens, open paren before close paren), this would work:

int startIndex = s.IndexOf('(') + 1;
string result = s.Substring(startIndex, s.LastIndexOf(')') - startIndex);

Answer 2

You could look a regular expressions, or otherwise play with the IndexOf() function

Answer 3

There are some different ways.

Plain string methods:

Dim left As Integer = str.IndexOf('(')
Dim right As Integer= str.IndexOf(')')
Dim content As String = str.Substring(left + 1, right - left - 1)

Regular expression:

Dim content As String = Regex.Match(str, "\((.+?)\)").Groups[1].Value

Answer 4

With regular expressions.

Dim result as String = System.Text.RegularExpressions.Regex.Match("GREECE (+30)", "\((?<Result>[^\)]*)\)").Groups["Result"].Value;

Code is not tested, but I expect only compilation issues.

Answer 5

In Python, using the string index method and slicing:

>>> s = "GREECE(+30)"
>>> s[s.index('(')+1:s.index(')')]
'+30'