473,666 Members | 2,449 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Type Conversion

1 New Member
What is the use of Converting one type to another?

For ex :

internal class B
{
// Base class
}
internal class D : B
{
// Derived class
}

B b2 = new D(); ------- What is the use?
Nov 26 '08 #1
3 1048
Plater
7,872 Recognized Expert Expert
For functions that require the base class as a parameter, you can still use your derrived class
Nov 26 '08 #2
Curtis Rutland
3,256 Recognized Expert Specialist
Well, in that scenario, you aren't converting between types at all. You're just holding an object of type D in a Type B wrapper...you could "convert" back without losing any information.

The usefulness is that, since they have the same methods and properties, you can perform the same operations on them. So if you had a method that took an object of type B as a parameter, it could also take those of type D and anything else derived from it.

This concept is called polymorphism, and it is central to the object-oriented programming concept.
Nov 26 '08 #3
shweta123
692 Recognized Expert Contributor
Hi,

Please refer Inheritance & Polymorphism regarding your question.
Nov 26 '08 #4

Sign in to post your reply or Sign up for a free account.

Similar topics

4
1679
by: Mark Oliver | last post by:
Hi, I want to put a type conversion in my class, but I don't want the conversion to be usable in a passed parameter because it makes no sense. class cData { string s; public cData(string s) { this.s=s;
7
2238
by: Madhu Gopinathan | last post by:
Hi, I hope this is the right forum for this question. I am extending ICollection to create a Collection Type (say MyCollection) wherein I can control the types of objects being added to the collection. Thus, my interface now looks like this public interface IMyCollection : ICollection { void Add (string toBeAdded);
27
5631
by: Yuriy Solodkyy | last post by:
Hi VS 2005 beta 2 successfully compiles the following: using System; using System.Collections.Generic; using System.Text; namespace ConsoleApplication1 { class Program {
3
1875
by: pgconnolly | last post by:
/* foreach does implicit type conversion on elements of a params argument or Generic.List. * This is not good. * Examples of evil follow... */ using System; // I love it when C# is strict with me... using System.Collections.Generic;
16
12785
by: Enekajmer | last post by:
Hi, 1 int main() 2 { 3 float a = 17.5; 4 printf("%d\n", a); 5 printf("%d\n", *(int *)&a); 6 return 0; 7 }
2
1878
by: Martin v. Löwis | last post by:
I've been working on PEP 353 for some time now. Please comment, in particular if you are using 64-bit systems. Regards, Martin PEP: 353 Title: Using ssize_t as the index type Version: $Revision: 42333 $
1
3273
by: lovecreatesbeauty | last post by:
There is a warning/(error? I remember it is an error for line 10 on some compilers before. At least on g++, it is an error.) for line 10. I first read a similar example from `Expert C Programming -- Deep Secrets, Perter van der Linden'. But I wonder why line 9 is ok but line 10 is illegal? Is what Keith Thompson said in another post also helpful to understand this question: "... The implicit conversion rule applies only to void*, not...
669
25860
by: Xah Lee | last post by:
in March, i posted a essay “What is Expressiveness in a Computer Language”, archived at: http://xahlee.org/perl-python/what_is_expresiveness.html I was informed then that there is a academic paper written on this subject. On the Expressive Power of Programming Languages, by Matthias Felleisen, 1990. http://www.ccs.neu.edu/home/cobbe/pl-seminar-jr/notes/2003-sep-26/expressive-slides.pdf
4
2102
by: zaeminkr | last post by:
I got a good answer here I have still confusing part. I have two very simple classes class DRect { private : double x0, y0, x1, y1; public : DRect(double a, double b, double c, double d) : x0(a), y0(b),
8
3144
by: Smithers | last post by:
Are there any important differences between the following two ways to convert to a type?... where 'important differences' means something more profound than a simple syntax preference of the developer. x = someObject as MySpecificType; x = (MySpecificType) someObject; Thanks.
0
8352
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
8780
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
0
8636
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
7378
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
5661
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4192
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
2765
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
2005
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
2
1763
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.