.net - Regex to allow only dots, letters and dashes in VB.NET -

i have code, , dimiss words spaces , starts +... have allow dots, letters , dashes... think more simple:

imports system.text.regularexpressions  public class contactos      readonly pattern string = "\s([^+\d\,]+),?"      private sub button1_click(sender object, e eventargs) handles button1.click          dim cadena string = " " & textbox1.text & ","          dim match match = regex.match(cadena, pattern)          while match.success             frmmain.listbox1.items.add(match.groups(1).tostring)             match = match.nextmatch()         loop     end sub end class 

what can do?

thanks! :)

please try following pattern "(?<=(^|,\s))(?<word>[\.a-za-z\-]+)($|,)" , use named group word expected values:

    while match.success         frmmain.listbox1.items.add(match.groups("word").tostring)         match = match.nextmatch()     loop