class one

{

one()

{

}

}

//This is Inheritance of base class.

class two:one

{

//this is the way to calling base class constructor

two:one()

{

}

}

By Inheriting the base class we can reuse the functionality of  base class in to sub class

here one is base class two is sub class.

example:

class one

{

int a,b,c;

public one()

{

a=0;

b=0;

c=0;

}

public int add(int a,int b)

{

c=a+b;

return c;

}

}

//here is the entry point.

static class entry_point

{

static void main()

{

one a=one();

console.write(a.add(2,3).toString());

//this is reusable

one b=one();

console.write(a.add(6,7).toString());

}

}

class class_name

{

//here we can declare members.

public | private | protected | protected internal member_name;

class_name()// this called constructor.

{

//here we can assign values for members.

member_name=values;

}

//here we can declare member function.

public | private | protected | protected internal function_name(arguments)

{

//here we can write the functionality of this function.

}

}

the above examples having public | private | protected | protected internal these are called access modifiers.

constraints of class

1. Constructor name and class name should be same.

2. Constructor should not have a return type.

3.By default protection level is private for constructor.

4.Class name should starts with alphabets.

This new data component, introduced with .NET, presented an exciting new approach to data access. Though the techniques, and logic used to connect to databases with ADO.NET weren’t startlingly different from those used with its predecessor, ADO.NET had a lot to offer. What was unique about this technology was the architecture beneath it all, its powerful approach to data management, and the flexibility in the next level of data-presenting devices.

ADO, for its time, was certainly successful. Although the re-releases of the technology hadn’t heralded dramatic change for ADO, it achieved what it had to within its own architecture. However, it was continually plagued by problems that surrounded its handling of disconnected data stores, and functioning properly and concisely with XML. This is where ADO.NET stepped in - these are the two things the new technology easily manages, as XML is the core component of the entire .NET Framework! ADO.NET was simply created to remedy all the deficiencies found in ADO, and provide developers with the power to achieve more with less.

In this article we’ll dive right into accessing data in .NET, and demonstrate the variety of options available to the ADO.NET developer for data access and presentation. This article is intended as a concise introduction to data access in .NET that’ll have you up to speed on the technology in no time.

About this Tutorials

Welcome to ASP.NET Tutorial (Using VB.Net and C#). By completing the lessons and exercises in this book, you will acquire the skill and knowledge necessary to develop large enterprise web-based application in VB.Net or C#.

This tutorial is specially designed for the beginners and students who are in the starting point of their IT carrier. Plain and simple English is used throughout the tutorials so that every one can understand the concepts we are discussing.

Intended Audience

The targetted audience for this tutorials are:

• Engineering and Computer Science Students
• Beginner level programmers who want to develop their career in ASP.NET based web development.
• Senior programmers who like to switch over to ASP.NET web programming.

What you need to know before you start ?

This tutorial required that students meet the following prerequisites:

• Have a basic understanding of the Object-oriented programming concepts including classes, properties, methods and events.

What do we offer ?

The ASP.NET tutorials in this site includes several chapters. We are still adding more and more chapters everyday. This tutorials may be completed by end of the year 2005.

Many chapters in this tutorials include small small exercises you can try on your computer.

By end of this tutorials, we will start an advanced ‘Shopping Cart’ project. We will lead you through each and every step of developing a large dynamic website.

Also, some of the last chapters will guide you through the webmaster world which may help you develop and own your commercial websites and even make money from running your own websites.