Build Your Own ASP.NET 2.0 Web Site Using C# & VB, Second Edition

You may also come across instances in which you need to exit a loop prematurely.

In these cases, you would use either Exit, if your code is in VB, or the equivalent

(break) statement in C#, to terminate the loop:

Visual Basic

Dim i As Integer

For i = 0 To 10

If (i = 5) Then

Response.Write("Oh no! Not the number 5!!")

Exit For

End If

Next

C#

int i;

for (i = 0; i <= 10; i++)

{

if (i == 5)

{

Response.Write("Oh no! Not the number 5!!");

break;

}

}

In this case, as soon as our For loop hits the condition i = 5, it displays a

warning message using the Response.Write method (which will be familiar to

those with past ASP experience), and exits the loop so that no further passes

through the loop will be made.

Although we’ve only scratched the surface, VB and C# provide a great deal of

power and flexibility to web developers, and time spent learning the basics now

will more than pay off in the future.

Object Oriented Programming Concepts

VB and C# are modern programming languages that give you the tools to write

structured, extensible, and maintainable code. The code can be separated into

modules, each of which defines classes that can be imported and used in other

modules. Both languages are relatively simple to get started with, yet they offer

sophisticated features for writing complex, large-scale enterprise applications.

One of the reasons why these languages are so powerful is that they facilitate

object oriented programming (OOP). In this section, we’ll explain the funda-

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Chapter 3: VB and C# Programming Basics