qr code generator c# asp.net PART I PART I PART I in C#

Draw QR Code in C# PART I PART I PART I

PART I PART I PART I
QR Code 2d Barcode Creation In C#
Using Barcode generator for VS .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
QR Code Decoder In Visual C#
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
= value;
Paint Bar Code In Visual C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create barcode image in .NET framework applications.
Recognizing Barcode In Visual C#.NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
Part I:
Quick Response Code Generator In VS .NET
Using Barcode creation for ASP.NET Control to generate, create QR image in ASP.NET applications.
QR Encoder In Visual Studio .NET
Using Barcode maker for .NET framework Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
The C# Language
QR Maker In VB.NET
Using Barcode creator for VS .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
Encoding EAN13 In Visual C#
Using Barcode drawer for .NET framework Control to generate, create UPC - 13 image in .NET framework applications.
Output from this program is shown here:
Universal Product Code Version A Generation In C#.NET
Using Barcode printer for VS .NET Control to generate, create UPC Symbol image in Visual Studio .NET applications.
Code 3/9 Creation In C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create Code 39 image in .NET framework applications.
Original value of obMyProp: 0 Value of obMyProp: 100 Attempting to assign -10 to obMyProp Value of obMyProp: 100
Draw Data Matrix In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create DataMatrix image in Visual Studio .NET applications.
European Article Number 8 Maker In Visual C#
Using Barcode creator for VS .NET Control to generate, create EAN-8 Supplement 2 Add-On image in VS .NET applications.
Let s examine this program carefully The program defines one private field, called prop, and a property called MyProp that manages access to prop As explained, a property by itself does not define a storage location Instead, most properties simply manage access to a field Furthermore, because prop is private, it can be accessed only through MyProp The property MyProp is specified as public so it can be accessed by code outside of its class This makes sense because it provides access to prop, which is private The get accessor simply returns the value of prop The set accessor sets the value of prop if and only if that value is positive Thus, the MyProp property controls what values prop can have This is the essence of why properties are important The type of property defined by MyProp is called a read-write property because it allows its underlying field to be read and written It is possible, however, to create read-only and write-only properties To create a read-only property, define only a get accessor To define a write-only property, define only a set accessor You can use a property to further improve the fail-soft array class As you know, all arrays have a Length property associated with them Up to now, the FailSoftArray class simply used a public integer field called Length for this purpose This is not good practice, though, because it allows Length to be set to some value other than the length of the failsoft array (For example, a malicious programmer could intentionally corrupt its value) We can remedy this situation by transforming Length into a read-only property, as shown in the following version of FailSoftArray:
GS1-128 Drawer In Objective-C
Using Barcode maker for iPad Control to generate, create GS1-128 image in iPad applications.
EAN-13 Scanner In Visual Basic .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
// Add Length property to FailSoftArray using System; class FailSoftArray { int[] a; // reference to underlying array int len; // length of array -- underlies Length property public bool ErrFlag; // indicates outcome of last operation // Construct array given its size public FailSoftArray(int size) { a = new int[size]; len = size; } // Read-only Length property public int Length { get { return len; } }
Recognize Barcode In VB.NET
Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in .NET framework applications.
GS1 RSS Generator In .NET
Using Barcode generator for .NET framework Control to generate, create DataBar image in Visual Studio .NET applications.
10:
Barcode Reader In VB.NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
Print Code 128A In None
Using Barcode encoder for Software Control to generate, create Code 128A image in Software applications.
Indexers and Properties
Encoding Code 39 In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create USS Code 39 image in ASP.NET applications.
Code39 Creation In None
Using Barcode generation for Font Control to generate, create Code-39 image in Font applications.
// This is the indexer for FailSoftArray public int this[int index] { // This is the get accessor get { if(ok(index)) { ErrFlag = false; return a[index]; } else { ErrFlag = true; return 0; } } // This is the set accessor set { if(ok(index)) { a[index] = value; ErrFlag = false; } else ErrFlag = true; } } // Return true if index is within bounds private bool ok(int index) { if(index >= 0 & index < Length) return true; return false; } } // Demonstrate the improved fail-soft array class ImprovedFSDemo { static void Main() { FailSoftArray fs = new FailSoftArray(5); int x; // Can read Length for(int i=0; i < fsLength; i++) fs[i] = i*10; for(int i=0; i < fsLength; i++) { x = fs[i]; if(x != -1) ConsoleWrite(x + " "); } ConsoleWriteLine(); // fsLength = 10; // Error, illegal! } }
PART I PART I PART I
Length is now a property that uses the private variable len for its storage Length defines only a get accessor, which means that it is read-only Thus, Length can be read, but not
Part I:
The C# Language
changed To prove this to yourself, try removing the comment symbol preceding this line in the program:
// fsLength = 10; // Error, illegal!
When you try to compile, you will receive an error message stating that Length is read-only Although the addition of the Length property improves FailSoftArray, it is not the only improvement that properties can make The ErrFlag member is also a prime candidate for conversion into a property since access to it should also be limited to read-only Here is the final improvement of FailSafeArray It creates a property called Error that uses the original ErrFlag variable as its storage, and ErrFlag is made private to FailSoftArray
// Convert ErrFlag into a property using System; class FailSoftArray { int[] a; // reference to underlying array int len; // length of array bool ErrFlag; // now private // Construct array given its size public FailSoftArray(int size) { a = new int[size]; len = size; } // Read-only Length property public int Length { get { return len; } } // Read-only Error property public bool Error { get { return ErrFlag; } } // This is the indexer for FailSoftArray public int this[int index] { // This is the get accessor get { if(ok(index)) { ErrFlag = false; return a[index]; } else { ErrFlag = true; return 0; } }
10:
Copyright © OnBarcode.com . All rights reserved.