qr code generator c# asp.net The C# Language in Visual C#

Encoder QR Code in Visual C# The C# Language

The C# Language
Making QR Code In C#
Using Barcode printer for VS .NET Control to generate, create QR image in .NET applications.
QR Reader In C#
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
officeArea = 4200; officeFloors = 3;
Bar Code Generator In Visual C#.NET
Using Barcode encoder for .NET Control to generate, create barcode image in .NET applications.
Recognizing Bar Code In C#.NET
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
ConsoleWriteLine("house has:\n " + houseFloors + " floors\n " + houseOccupants + " occupants\n houseArea + " total area"); houseAreaPerPerson(); ConsoleWriteLine(); ConsoleWriteLine("office has:\n " + officeFloors + " floors\n " + officeOccupants + " occupants\n officeArea + " total area"); officeAreaPerPerson(); } }
QR Code JIS X 0510 Maker In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
QR-Code Creation In VS .NET
Using Barcode creator for .NET framework Control to generate, create Denso QR Bar Code image in .NET applications.
This program generates the following output, which is the same as before:
QR Code Printer In Visual Basic .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create QR image in .NET applications.
GS1 128 Encoder In Visual C#
Using Barcode printer for Visual Studio .NET Control to generate, create EAN128 image in .NET applications.
house has: 2 floors 4 occupants 2500 total area 625 area per person office has: 3 floors 25 occupants 4200 total area 168 area per person
Code 39 Full ASCII Drawer In C#
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 3/9 image in .NET framework applications.
ECC200 Maker In Visual C#
Using Barcode generator for .NET framework Control to generate, create Data Matrix ECC200 image in .NET framework applications.
Let s look at the key elements of this program, beginning with the AreaPerPerson( ) method, itself The first line of AreaPerPerson( ) is
Draw Barcode In C#
Using Barcode generator for .NET Control to generate, create bar code image in VS .NET applications.
International Standard Book Number Printer In C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create ISBN - 10 image in Visual Studio .NET applications.
public void AreaPerPerson() {
Draw Code 128C In .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Code 128B image in .NET applications.
Recognize Bar Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
This line declares a method called AreaPerPerson( ) that has no parameters It is specified as public, so it can be used by all other parts of the program Its return type is void Thus, AreaPerPerson( ) does not return a value to the caller The line ends with the opening curly brace of the method body The body of AreaPerPerson( ) consists solely of this statement:
Encode UPC-A Supplement 5 In Visual Studio .NET
Using Barcode encoder for Reporting Service Control to generate, create GS1 - 12 image in Reporting Service applications.
Recognize Barcode In Visual Basic .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
ConsoleWriteLine(" " + Area / Occupants + " area per person");
Data Matrix ECC200 Reader In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Painting Code 3/9 In VB.NET
Using Barcode printer for .NET framework Control to generate, create Code 39 image in .NET framework applications.
This statement displays the area-per-person of a building by dividing Area by Occupants Since each object of type Building has its own copy of Area and Occupants, when AreaPerPerson( ) is called, the computation uses the calling object s copies of those variables The AreaPerPerson( ) method ends when its closing curly brace is encountered This causes program control to transfer back to the caller
Paint GS1 DataBar Stacked In Visual Studio .NET
Using Barcode creation for VS .NET Control to generate, create GS1 DataBar Limited image in Visual Studio .NET applications.
Making USS Code 39 In None
Using Barcode printer for Office Excel Control to generate, create Code39 image in Office Excel applications.
6:
Introducing Classes and Objects
Next, look closely at this line of code from inside Main( ):
houseAreaPerPerson();
PART I
This statement invokes the AreaPerPerson( ) method on house That is, it calls AreaPerPerson( ) relative to the object referred to by house, by use of the dot operator When a method is called, program control is transferred to the method When the method terminates, control is transferred back to the caller, and execution resumes with the line of code following the call In this case, the call to houseAreaPerPerson( ) displays the area-per-person of the building defined by house In similar fashion, the call to officeAreaPerPerson( ) displays the area-per-person of the building defined by office Each time AreaPerPerson( ) is invoked, it displays the area-per-person for the specified object There is something very important to notice inside the AreaPerPerson( ) method: The instance variables Area and Occupants are referred to directly, without use of the dot operator When a method uses an instance variable that is defined by its class, it does so directly, without explicit reference to an object and without use of the dot operator This is easy to understand if you think about it A method is always invoked relative to some object of its class Once this invocation has occurred, the object is known Thus, within a method, there is no need to specify the object a second time This means that Area and Occupants inside AreaPerPerson( ) implicitly refer to the copies of those variables found in the object that invokes AreaPerPerson( )
NOTE As a point of interest, in the AreaPerPerson( ) method, Occupants must not equal zero
(which it won t for all of the examples in this chapter) If Occupants were zero, then a divisionby-zero error would occur In 13, you will learn about exceptions, which are C# s approach to handling errors, and see how to watch for errors that can occur at runtime
Return from a Method
In general, there are two conditions that cause a method to return The first, as the AreaPerPerson( ) method in the preceding example shows, is when the method s closing curly brace is encountered The second is when a return statement is executed There are two forms of return: one for use in void methods (those that do not return a value) and one for returning values The first form is examined here The next section explains how to return values In a void method, you can cause the immediate termination of a method by using this form of return: return ; When this statement executes, program control returns to the caller, skipping any remaining code in the method For example, consider this method:
public void MyMeth() { int i; for(i=0; i<10; i++) { if(i == 5) return; // stop at 5 ConsoleWriteLine(); } }
Part I:
Copyright © OnBarcode.com . All rights reserved.