public static string CheckUpdateShow(int SellerId, string name, string URL, string description, string s_price) { string response = ""; Regex expression = new Regex(@"[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)"); if (name == "") { response = "Name must be filled"; } else if (name.Length < 5) { response = "Name must be at least 5 characters"; } else if (URL == "") { response = "URL must be filled"; } else if (!expression.IsMatch(URL)) { response = "URL must be valid format"; } else if (description == "") { response = "Description must be filled"; } else if (s_price == "") { response = "Price must be filled"; } else if (int.Parse(s_price) < 1000) { response = "Price must be at least 1000"; } else { int price = int.Parse(s_price); ShowHandler.UpdateShow(SellerId, name, price, description); } return(response); }