Solved

How do you set derived props in addition to base props?

Posted on 2004-09-23
4
383 Views
Last Modified: 2010-04-15
Hi all. I have a BaseClass with some properties that is common to all my class:

class BaseClass
{
  string BaseProperty
  {
    get{...;}
    set{...;}
  }

  protected static BaseClass<not sure if this is correct return type> ParseLine(string CurrentLine)
  {
    BaseClass baseClass = new BaseClass();
    baseClass.BaseProperty = "some value";
    return baseClass;
  }
}

And then a derived class with additional props, and a method that parses a file specific for this class:

class DerivedClass : BaseClass
{
  string SomeOtherProp
  {
    get{...;}
    set{...;}
  }

  public void SetFields(string FileName)
  {
    //Within FileName resides fields that are common to all base classes
    //It also has additional fields specific to this class
    //I need to be able to set the common fields in the base class, but also continue setting props for the derived class
   
    //this would be where I open the file and get the current line
   
    //Next step -- I think
    BaseClass someClass = BaseClass.ParseLine(currentLine);
   
    //NOW I want to be able to set the additional properties in this derived class but still keep the properties that were set in the ParseLine above
    //How the heck do I do it?    
  }
}
0
Comment
Question by:Junoti
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 10

Accepted Solution

by:
eternal_21 earned 500 total points
ID: 12138698
I have thrown together a similar structure to what you have described, which demonstrated TWO ways to accomplish this.  You can do it through constructor chaining, or by calling virtual or base methods:

    public static void Main(string[] args)
    {
      DerivedClass dClass = new DerivedClass("BaseProp,DerProp");
     
      Console.WriteLine(dClass.BaseProperty); //"BaseProp"
      Console.WriteLine(dClass.DerivedProperty); //"DerProp"

      dClass.ResetProperties("xProp,yProp");

      Console.WriteLine(dClass.BaseProperty); //"xProp"
      Console.WriteLine(dClass.DerivedProperty); //"yProp"
    }

    abstract class BaseClass
    {
      string baseProperty;
      public string BaseProperty
      {
        get { return baseProperty; }
      }

      protected BaseClass(string propertyString)
      {
        baseProperty = propertyString.Split(',')[0];
      }

      public virtual void ResetProperties(string propertyString)
      {
        baseProperty = propertyString.Split(',')[0];
      }
    }

    class DerivedClass: BaseClass
    {
      string derivedProperty;
      public string DerivedProperty
      {
        get { return derivedProperty; }
      }

      public DerivedClass(string propertyString): base(propertyString)
      {
        derivedProperty = propertyString.Split(',')[1];
      }

      public override void ResetProperties(string propertyString)
      {
        base.ResetProperties(propertyString);
        derivedProperty = propertyString.Split(',')[1];
      }
    }
0
 
LVL 10

Expert Comment

by:123654789987
ID: 12168539
If u want to set the derived properties in addition to the base properties. Then u have to create an instance of the derived class. This will show all the properties - ones of the base cass and that of the derived class
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…

718 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question