проверить номер телефона в классе объекта

Question

Я пытаюсь создать класс контактов, представляющий отдельные контакты, которые появятся в моем приложении диспетчера контактов. Мне нужно проверить, что номер телефона в формате 123-456-7890, но я не уверен, как это сделать?

Код:

class Contact 
{ 
    //private member variables 
    private String _firstName; 
    private String _lastName; 
    private Type _contactTypes; 
    private String _phoneNumber; 
    private String _emailAddress; 




    //Public constructor that takes five arguments 
    public Contact(String firstName, String lastName, Type contactTypes, String phoneNumber, String emailAddress) 
    { 
     //Call the appropriate setter (e.g. FirstName) to set the member variable value 
     FirstName = firstName; 
     LastName = lastName; 
     ContactTypes = contactTypes; 
     PhoneNumber = phoneNumber; 
     EmailAddress = emailAddress; 

    } 


    /********************************************************************* 
    * Public accessors used to get and set private member variable values 
    *********************************************************************/ 
    //Public ContactTypes accessor 
    public Type ContactTypes 
    { 
     get 
     { 
      //Return member variable value 
      return _contactTypes; 
     } 
     set 
     { 
      //Validate value and throw exception if necessary 
      if (value == "") 
       throw new Exception("ContactType must have a value"); 
      else 
       //Otherwise set member variable value 
       _lastName = value; 
     } 
    } 
    enum ContactTypes { Family, Friend, Professional } 
    //Public FirstName accessor: Pascal casing 
    public String GetFirstName 
    { 
     get 
     { 
      //Return member variable value 
      return _firstName; 
     } 
     set 
     { 
      //Validate value and throw exception if necessary 
      if (value == "") 
       throw new Exception("First name must have a value"); 
      else 
       //Otherwise set member variable value 
       _firstName = value; 
     } 
    } 

    //Public LastName accessor: Pascal casing 
    public String GetLastName 
    { 
     get 
     { 
      //Return member variable value 
      return _lastName; 
     } 
     set 
     { 
      //Validate value and throw exception if necessary 
      if (value == "") 
       throw new Exception("Last name must have a value"); 
      else 
       //Otherwise set member variable value 
       _lastName = value; 
     } 
    } 



    //Public PhoneNumber accessor 
    public String GetPhoneNumber 
    { 
     get 
     { 
      //Return member variable value 
      return _phoneNumber; 
     } 
     set 
     { 
      //Validate value and throw exception if necessary 
      if (value == "") 
       throw new Exception("PhoneNumber must have a value"); 
      else 
       //Otherwise set member variable value 
       _lastName = value; 
     } 
    } 



    //Public Email accessor 
    public String GetEmailAddress 
    { 
     get 
     { 
      //Return member variable value 
      return _emailAddress; 
     } 
     set 
     { 
      //Validate value and throw exception if necessary 
      if (value == "") 
       throw new Exception("EmailAddress must have a value"); 
      else 
       //Otherwise set member variable value 
       _emailAddress = value; 
     } 
    } 

Answer 1

Вы можете использовать следующие регулярные выражения

bool isValid = Regex.IsMatch(value, @"/d{3}-/d{3}-/d{4}"); 

Answer 2

Читайте о regular expressions в C#.

Answer 3

Вы можете использовать следующую статью, в которой содержится пример кода, как использовать его:

http://www.authorcode.com/how-to-use-regular-expression-for-validating-phone-numbers-in-net/