barcode printing using c#.net NOTE Technically, in order for a class to be used with a foreach loop, it does not actually have to in C#.NET

Encoder Quick Response Code in C#.NET NOTE Technically, in order for a class to be used with a foreach loop, it does not actually have to

NOTE Technically, in order for a class to be used with a foreach loop, it does not actually have to
QR Code 2d Barcode Maker In C#.NET
Using Barcode generator for .NET framework Control to generate, create Quick Response Code image in Visual Studio .NET applications.
Recognize QR-Code In Visual C#
Using Barcode reader for .NET Control to read, scan read, scan image in .NET framework applications.
specify IEnumerator or IEnumerable as implemented interfaces It does, however, have to provide their methods, which are GetEnumerator( ), Reset( ), MoveNext( ), and the property Current However, not specifying these interfaces reduces the usability of the class in a mixedlanguage environment Here is an example that implements the non-generic versions of IEnumerable and IEnumerator so that the contents of the array encapsulated within MyClass can be enumerated:
Painting Barcode In Visual C#
Using Barcode printer for Visual Studio .NET Control to generate, create bar code image in VS .NET applications.
Bar Code Decoder In Visual C#
Using Barcode reader for VS .NET Control to read, scan read, scan image in VS .NET applications.
// Implement IEnumerable and IEnumerator using System; using SystemCollections; class MyClass : IEnumerator, IEnumerable { char[] chrs = { 'A', 'B', 'C', 'D' }; int idx = -1; // Implement IEnumerable public IEnumerator GetEnumerator() { return this; } // The following methods implement IEnumerator // Return the current object public object Current { get {
Paint QR Code In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
Generate QR Code JIS X 0510 In .NET Framework
Using Barcode generator for VS .NET Control to generate, create QR Code JIS X 0510 image in .NET applications.
Part II:
Generate QR In VB.NET
Using Barcode printer for .NET Control to generate, create QR Code JIS X 0510 image in .NET applications.
Linear Drawer In C#
Using Barcode printer for .NET framework Control to generate, create Linear image in VS .NET applications.
Exploring the C# Library
Creating Matrix Barcode In C#
Using Barcode creator for .NET framework Control to generate, create Matrix 2D Barcode image in VS .NET applications.
Data Matrix 2d Barcode Encoder In C#.NET
Using Barcode encoder for .NET framework Control to generate, create Data Matrix 2d barcode image in VS .NET applications.
return chrs[idx]; } } // Advance to the next object public bool MoveNext() { if(idx == chrsLength-1) { Reset(); // reset enumerator at the end return false; } idx++; return true; } // Reset the enumerator to the start public void Reset() { idx = -1; } } class EnumeratorImplDemo { static void Main() { MyClass mc = new MyClass(); // Display the contents of mc foreach(char ch in mc) ConsoleWrite(ch + " "); ConsoleWriteLine(); // Display the contents of mc, again foreach(char ch in mc) ConsoleWrite(ch + " "); ConsoleWriteLine(); } }
Drawing Barcode In C#.NET
Using Barcode maker for .NET Control to generate, create barcode image in .NET framework applications.
Encode GS1 - 8 In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create EAN / UCC - 8 image in .NET applications.
Here is the output:
Barcode Creation In Java
Using Barcode creator for Java Control to generate, create bar code image in Java applications.
Scanning EAN 13 In VB.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
A B C D A B C D
Bar Code Encoder In .NET Framework
Using Barcode creation for Reporting Service Control to generate, create barcode image in Reporting Service applications.
Encode ANSI/AIM Code 128 In None
Using Barcode maker for Microsoft Word Control to generate, create Code 128 Code Set A image in Word applications.
In the program, first examine MyClass It encapsulates a small char array that contains the characters A through D An index into this array is stored in idx, which is initialized to 1 MyClass then implements both IEnumerator and IEnumerable GetEnumerator( ) returns a reference to the enumerator, which in this case is the current object The Current property returns the next character in the array, which is the object at idx The MoveNext( ) method advances idx to the next location It returns false if the end of the collection has been reached and true otherwise Reset( ) sets idx to 1 Recall that an enumerator is undefined until after the first call to MoveNext( ) Thus, in a foreach loop, MoveNext( ) is automatically called before Current This is why idx must initially be 1; it is advanced to zero when the foreach loop begins A generic implementation would work in a similar fashion Inside Main( ), an object of type MyClass called mc is created and the contents of the object are twice displayed by use of a foreach loop
Barcode Drawer In .NET Framework
Using Barcode drawer for Reporting Service Control to generate, create barcode image in Reporting Service applications.
Printing Bar Code In Objective-C
Using Barcode drawer for iPad Control to generate, create bar code image in iPad applications.
24:
EAN-13 Drawer In Objective-C
Using Barcode creation for iPad Control to generate, create GTIN - 13 image in iPad applications.
Data Matrix ECC200 Creator In Java
Using Barcode drawer for Eclipse BIRT Control to generate, create DataMatrix image in Eclipse BIRT applications.
Collections, Enumerators, and Iterators
Using Iterators
As the preceding example shows, it is not difficult to implement IEnumerator and IEnumerable However, it can be made even easier through the use of an iterator An iterator is a method, operator, or accessor that returns the members of a set of objects, one member at a time, from start to finish For example, assuming some array that has five elements, then an iterator for that array will return those five elements, one at a time By implementing an iterator, you make it possible for an object of a class to be used in a foreach loop Let s begin with an example of a simple iterator The following program is a modified version of the preceding program that uses an iterator rather than explicitly implementing IEnumerator and IEnumerable
// A simple example of an iterator using System; using SystemCollections; class MyClass { char[] chrs = { 'A', 'B', 'C', 'D' }; // This iterator returns the characters // in the chrs array public IEnumerator GetEnumerator() { foreach(char ch in chrs) yield return ch; } } class ItrDemo { static void Main() { MyClass mc = new MyClass(); foreach(char ch in mc) ConsoleWrite(ch + " "); ConsoleWriteLine(); } }
Copyright © OnBarcode.com . All rights reserved.