E.5. Using Unicode

Table of contents:

Visual Studio uses Unicode UTF-16 encoding to represent all characters. Figure E.3 uses C# to display the text "Welcome to Unicode" in eight languagesEnglish, French, German, Japanese, Portuguese, Russian, Spanish and Traditional Chinese. [Note: The Unicode Consortium's Web site contains a link to code charts that lists the 16-bit Unicode code values.]

Figure E.3. Windows application demonstrating Unicode encoding.

 1 // Fig. E.3: UnicodeForm.cs
 2 // Unicode enconding demonstration.
 3 using System;
 4 using System.Windows.Forms;
 5
 6 namespace UnicodeDemo
 7 {
 8 public partial class UnicodeForm : Form
 9 {
10 public UnicodeForm()
11 {
12 InitializeComponent();
13 }
14
15 // assign Unicode strings to each Label
16 private void UnicodeForm_Load( object sender, EventArgs e )
17 {
18 // English
19 char[] english = { 'u0057', 'u0065', 'u006C',
20 'u0063', 'u006F', 'u006D', 'u0065', 'u0020',
21 'u0074', 'u006F', 'u0020' };
22 englishLabel.Text = new string( english ) +
23 "Unicode" + 'u0021';
24 25 // French 26 char[] french = { 'u0042', 'u0069', 'u0065', 27 'u006E', 'u0076', 'u0065', 'u006E', 'u0075', 28 'u0065', 'u0020', 'u0061', 'u0075', 'u0020' }; 29 frenchLabel.Text = new string( french ) + 30 "Unicode" + 'u0021'; 31 32 // German 33 char[] german = { 'u0057', 'u0069', 'u006C', 34 'u006B', 'u006F', 'u006D', 'u006D', 'u0065', 35 'u006E', 'u0020', 'u007A', 'u0075', 'u0020' }; 36 germanLabel.Text = new string( german ) + 37 "Unicode" + 'u0021'; 38 39 // Japanese 40 char[] japanese = { 'u3078', 'u3087', 'u3045', 41 'u3053', 'u305D', 'u0021' }; 42 japaneseLabel.Text = "Unicode" + new string( japanese ); 43 44 // Portuguese 45 char[] portuguese = { 'u0053', 'u0065', 'u006A', 46 'u0061', 'u0020', 'u0062', 'u0065', 'u006D', 47 'u0020', 'u0076', 'u0069', 'u006E', 'u0064', 48 'u006F', 'u0020', 'u0061', 'u0020' }; 49 portugueseLabel.Text = new string( portuguese ) + 50 "Unicode" + 'u0021'; 51 52 // Russian 53 char[] russian = { 'u0414', 'u043E', 'u0431', 54 'u0440', 'u043E', 'u0020', 'u043F', 'u043E', 55 'u0436', 'u0430', 'u043B', 'u043E', 'u0432', 56 'u0430', 'u0442', 'u044A', 'u0020', 'u0432', 'u0020' }; 57 russianLabel.Text = new string( russian ) + 58 "Unicode" + 'u0021'; 59 60 // Spanish 61 char[] spanish = { 'u0042', 'u0069', 'u0065', 62 'u006E', 'u0076', 'u0065', 'u006E', 'u0069', 63 'u0064', 'u006F', 'u0020', 'u0061', 'u0020' }; 64 spanishLabel.Text = new string( spanish ) + 65 "Unicode" + 'u0021'; 66 67 // Simplified Chinese 68 char[] chinese = { 'u6B22', 'u8FCE', 'u4F7F', 69 'u7528', 'u0020' }; 70 chineseLabel.Text = new string( chinese ) + 71 "Unicode" + 'u0021'; 72 } // end method UnicodeForm_Load 73 } // end class UnicodeForm 74 } // end namespace UnicodeDemo

The first welcome message (lines 1923) contains the hexadecimal codes for the English text. The Code Charts page on the Unicode Consortium Web site contains a document that lists the code values for the Basic Latin block (or category), which includes the English alphabet. The hexadecimal codes in lines 1920 equate to "Welcome" and a space character (u0020). Unicode characters in C# use the format uyyyy, where yyyy represents the hexadecimal Unicode encoding. For example, the letter "W" (in "Welcome") is denoted by u0057. The hexadecimal values for the word "to" and a space character appear on line 21 and the word "Unicode" is on line 23. "Unicode" is not encoded because it is a registered trademark and has no equivalent translation in most languages.

The remaining welcome messages (lines 2671) contain the hexadecimal codes for the other seven languages. The code values used for the French, German, Portuguese and Spanish text are located in the Basic Latin block, the code values used for the Traditional Chinese text are located in the CJK Unified Ideographs block, the code values used for the Russian text are located in the Cyrillic block and the code values used for the Japanese text are located in the Hiragana block.

[Note: To render the Asian characters in a Windows application, you would need to install the proper language files on your computer. To do this, open the Regional Options dialog from the Control Panel (Start > Settings > Control Panel). At the bottom of the General tab is a list of languages. Check the Japanese and the Traditional Chinese checkboxes and press Apply. Follow the directions of the install wizard to install the languages. For additional assistance, visit www.unicode.org/help/display_problems.html.]

E 6 Character Ranges

Preface

Index

    Introduction to Computers, the Internet and Visual C#

    Introduction to the Visual C# 2005 Express Edition IDE

    Introduction to C# Applications

    Introduction to Classes and Objects

    Control Statements: Part 1

    Control Statements: Part 2

    Methods: A Deeper Look

    Arrays

    Classes and Objects: A Deeper Look

    Object-Oriented Programming: Inheritance

    Polymorphism, Interfaces & Operator Overloading

    Exception Handling

    Graphical User Interface Concepts: Part 1

    Graphical User Interface Concepts: Part 2

    Multithreading

    Strings, Characters and Regular Expressions

    Graphics and Multimedia

    Files and Streams

    Extensible Markup Language (XML)

    Database, SQL and ADO.NET

    ASP.NET 2.0, Web Forms and Web Controls

    Web Services

    Networking: Streams-Based Sockets and Datagrams

    Searching and Sorting

    Data Structures

    Generics

    Collections

    Appendix A. Operator Precedence Chart

    Appendix B. Number Systems

    Appendix C. Using the Visual Studio 2005 Debugger

    Appendix D. ASCII Character Set

    Appendix E. Unicode®

    Appendix F. Introduction to XHTML: Part 1

    Appendix G. Introduction to XHTML: Part 2

    Appendix H. HTML/XHTML Special Characters

    Appendix I. HTML/XHTML Colors

    Appendix J. ATM Case Study Code

    Appendix K. UML 2: Additional Diagram Types

    Appendix L. Simple Types

    Index



    Visual C# How to Program
    Visual C# 2005 How to Program (2nd Edition)
    ISBN: 0131525239
    EAN: 2147483647
    Year: 2004
    Pages: 600

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