barcode printing using c#.net Exploring the C# Library in Visual C#

Creating QR in Visual C# Exploring the C# Library

Exploring the C# Library
Denso QR Bar Code Encoder In Visual C#
Using Barcode printer for VS .NET Control to generate, create Quick Response Code image in .NET framework applications.
QR-Code Recognizer In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET framework applications.
The output is shown here:
Generate Barcode In C#
Using Barcode maker for .NET framework Control to generate, create bar code image in .NET applications.
Barcode Reader In C#.NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET applications.
A B C D
Draw QR Code 2d Barcode In .NET
Using Barcode creator for ASP.NET Control to generate, create QR Code 2d barcode image in ASP.NET applications.
Painting QR-Code In VS .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Denso QR Bar Code image in VS .NET applications.
As you can see, the contents of mcchrs was enumerated Let s examine this program carefully First, notice that MyClass does not specify IEnumerator as an implemented interface When creating an iterator, the compiler automatically implements this interface for you Second, pay special attention to the GetEnumerator( ) method, which is shown again here for your convenience:
QR Code Generation In VB.NET
Using Barcode creator for .NET Control to generate, create Quick Response Code image in Visual Studio .NET applications.
Encode Code 39 In Visual C#
Using Barcode encoder for Visual Studio .NET Control to generate, create ANSI/AIM Code 39 image in .NET applications.
// This iterator returns the characters // in the chrs array public IEnumerator GetEnumerator() { foreach(char ch in chrs) yield return ch; }
Matrix Barcode Creator In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create Matrix 2D Barcode image in .NET applications.
Generate Barcode In C#.NET
Using Barcode creation for .NET framework Control to generate, create bar code image in VS .NET applications.
This is the iterator for MyClass Notice that it implicitly implements the GetEnumerator( ) method defined by IEnumerable Now, look at the body of the method It contains a foreach loop that returns the elements in chrs It does this through the use of a yield return statement The yield return statement returns the next object in the collection, which in this case is the next character in chrs This feature enables mc (a MyClass object) to be used within the foreach loop inside Main( ) The term yield is a contextual keyword in the C# language This means that it has special meaning only inside an iterator block Outside of an iterator, yield can be used like any other identifier One important point to understand is that an iterator does not need to be backed by an array or other type of collection It simply must return the next element in a group of elements This means the elements can be dynamically constructed using an algorithm For example, here is a version of the previous program that returns all uppercase letters in the alphabet Instead of using an array, it generates the letters using a for loop
Generate UPCA In Visual C#
Using Barcode maker for .NET Control to generate, create GTIN - 12 image in .NET framework applications.
USS-93 Creator In C#.NET
Using Barcode creator for .NET framework Control to generate, create USS Code 93 image in .NET applications.
// Iterated values can be dynamically constructed using System; using SystemCollections; class MyClass { char ch = 'A'; // This iterator returns the letters of the alphabet public IEnumerator GetEnumerator() { for(int i=0; i < 26; i++) yield return (char) (ch + i); } } class ItrDemo2 { static void Main() { MyClass mc = new MyClass();
Decode Bar Code In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Data Matrix Recognizer In Visual C#.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET framework applications.
25:
Painting Code 3 Of 9 In Java
Using Barcode maker for Java Control to generate, create Code 39 Full ASCII image in Java applications.
Drawing UPCA In .NET
Using Barcode creator for Reporting Service Control to generate, create UPC-A image in Reporting Service applications.
Collections, Enumerators, and Iterators
Make Code 39 Full ASCII In .NET Framework
Using Barcode printer for ASP.NET Control to generate, create Code 39 Full ASCII image in ASP.NET applications.
UCC - 12 Creation In None
Using Barcode maker for Online Control to generate, create GS1 128 image in Online applications.
foreach(char ch in mc) ConsoleWrite(ch + " "); ConsoleWriteLine(); } }
Paint EAN / UCC - 13 In Java
Using Barcode creator for Android Control to generate, create GTIN - 13 image in Android applications.
Barcode Generator In VB.NET
Using Barcode printer for Visual Studio .NET Control to generate, create bar code image in .NET applications.
The output is shown here:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Stopping an Iterator
You can stop an iterator early by using this form of the yield statement: yield break; When this statement executes, the iterator signals that the end of the collection has been reached, which effectively stops the iterator The following program modifies the preceding program so that it displays only the first ten letters in the alphabet
// Use yield break using System; using SystemCollections; class MyClass { char ch = 'A'; // This iterator returns the first 10 // letters of the alphabet public IEnumerator GetEnumerator() { for(int i=0; i < 26; i++) { if(i == 10) yield break; // stop iterator early yield return (char) (ch + i); } } } class ItrDemo3 { static void Main() { MyClass mc = new MyClass(); foreach(char ch in mc) ConsoleWrite(ch + " "); ConsoleWriteLine(); } }
PART II
The output is shown here:
A B C D E F G H I J
Part II:
Exploring the C# Library
Using Multiple yield Directives
You can have more than one yield statement in an iterator However, each yield must return the next element in the collection For example, consider this program:
// Multiple yield statements are allowed using System; using SystemCollections; class MyClass { // This iterator returns the letters // A, B, C, D, and E public IEnumerator GetEnumerator() { yield return 'A'; yield return 'B'; yield return 'C'; yield return 'D'; yield return 'E'; } } class ItrDemo5 { static void Main() { MyClass mc = new MyClass(); foreach(char ch in mc) ConsoleWrite(ch + " "); ConsoleWriteLine(); } }
The output is shown here:
Copyright © OnBarcode.com . All rights reserved.