Examples of inheritance and polymorphism for asp.net beginners (2)

Asp.net| Beginners | Inherit public class Extendedprofile:profile build profile subclass Extendedprofile, he can inherit the method in profile


   {


protected string _address1; Properties of Subclass Extendedprofile


protected string _address2;


protected string _city;


protected string _state;


protected string _postal;


protected string _description;


  


the initial value of the property in the public extendedprofile ()//Subclass Extendedprofile


   {


_address1 = "Tsinghua University";


_address2 = "Physics Laboratory of Tsinghua University";


_city = "Beijing";


_state = "Beijing";


_postal = "100024";


_description = "Professor";


   }





public override void Setphonenumber (string phonenumber)//Inheritance Class Profile Setphonenumber () method

Overload of the
{//setphonenumber () method


_phonenumber = PhoneNumber;


   }


  


the Method GetAddress1 () in the public string GetAddress1 ()//subclass Extendedprofile, and the following analogy


   {


return _address1;


   }


public String GetAddress2 ()


   {


return _address2;


   }


public void Setaddress (String address1,string address2)


   {


_address1 = Address1;


_address2 = address2;


   }


  


public String getcity ()


{


return _city;


   }


public void Setcity (string city)


   {


_city = city;


   }


  


public String getState ()


   {


return _state;


   }


public void SetState (string state)


   {


_state = State;


   }


  


public String getpostal ()


   {


return _postal;


   }


public void Setpostal (string postal)


   {


_postal = postal;


   }





public String getdescription ()


   {


return _description;


   }


public void SetDescription (string description)


   {


_description = description;


   }


  


public override void Save ()//Invoke the Method Save () in the Interface Isavedata (), the overload of the Save () method, due to polymorphism


{//subclass Extendedprofile can customize and modify the Save () method


string _document = "D:\\myweb2\\saidy.xml";


XmlTextWriter writer = null; Save as an XML file


Try


   {


writer = new XmlTextWriter (_document,null);


writer. formatting = formatting.indented;


writer. WriteStartDocument (FALSE);


writer. Writedoctype ("Profile", null,null,null); Indicates <! DOCTYPE profile>


writer. WriteStartElement ("Profile"); Generate root element


writer. WriteElementString ("FirstName", _FirstName); Generating child elements <firstname>_firstname</firstname>


writer. WriteElementString ("LastName", _lastname);


writer. WriteElementString ("PhoneNumber", _PhoneNumber);


writer. WriteElementString ("Address1", _address1);


writer. WriteElementString ("Address2", _address2);


writer. WriteElementString ("City", _city);


writer. WriteElementString ("state", _state);


writer. WriteElementString ("Postal", _postal);


writer. WriteEndElement ();


writer. Flush ();


writer. Close ();


}


catch (Exception ee)


   {


Console.WriteLine ("Exception:{0}", EE. ToString ());


   }


   }


  }


  }