C# 使用对象类以正确的格式提供电子邮件和电话号码

我正在尝试为我的contact Manager应用程序创建一个contact类，我需要电子邮件必须包含1个且仅包含1个@符号，并确保电话号码的格式为123-456-7890，但我不确定如何执行此操作

如有任何指导，将不胜感激

class Contact
{
    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()
        {
            //Call the appropriate setter (e.g. FirstName) to set the member variable value
            /* GetFirstName = firstName;
             GetLastName = lastName;
             ContactTypes = contactTypes;
             GetPhoneNumber = phoneNumber;
             GetEmailAddress = 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 == null)
                    throw new Exception("ContactType must have a value");
                else
                    //Otherwise set member variable value*/
                    _contactTypes = value;
            }
        }
        enum ContactTypesEnum { 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
            {
                bool isValid = Regex.IsMatch(value, @"/d{3}-/d{3}-/d{4}"); 
                //Validate value and throw exception if necessary
                if (value == "")
                    throw new Exception("PhoneNumber must have a value");
                else
                    //Otherwise set member variable value
                    _phoneNumber = 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;
            }
        }

    }
}

---

我同意@Enigmativity的评论——在访问器集函数中抛出异常不是一个好主意。也就是说，在

GetPhoneNumber

中，您的

isValid

正则表达式测试已经完成了一半

set
{
    bool isValid = Regex.IsMatch(value, @"/d{3}-/d{3}-/d{4}"); 
    if (isValid) // Set member variable value
        _phoneNumber = value;
}

---

您可以对电子邮件执行类似的正则表达式测试，也可以使用

System.Net.Mail.MailAddress

类。看到这一点。

当您得到错误的值时，您真的不应该抛出异常。例外情况应适用于硬盘空间不足或连接中断等异常情况。应使用数据验证技术处理无效输入-在分配前预验证或在对象上实现

IDataErrorInfo

。