Bestimmte Werte in einem Text auslesen

public object DoWork() { object o = InValues[0].GetString(); if (o == null) return o; string s = (string)o; int v = 0; int pos1 = 0; int pos2 = 0; if (s.IndexOf("ab", 0, StringComparison.OrdinalIgnoreCase) >= 0) { pos1 = s.IndexOf("ab", 0, StringComparison.OrdinalIgnoreCase); pos2 = s.IndexOf("eur", 0, StringComparison.OrdinalIgnoreCase); pos1 += 3; v = -1; } else if (s.IndexOf("bis", 0, StringComparison.OrdinalIgnoreCase) >= 0) { pos1 = s.IndexOf("bis", 0, StringComparison.OrdinalIgnoreCase); pos2 = s.IndexOf("eur", 0, StringComparison.OrdinalIgnoreCase); pos1 += 4; v = 1; } else return 0; string wert = s.Substring(pos1, pos2 - pos1); wert = wert.Replace(".", ""); return Int32.Parse(wert) + v; }