Sams Teach Yourself C# in 24 Hours

By James Foxall and Wendy Haro-Chun

• Table of Contents
  • Copyright
  • About the Authors
  • Acknowledgments
  • Tell Us What You Think!
  • Introduction
  • Audience and Organization
  • Conventions Used in This Book
  • Onward and Upward!
  • Part I. The Visual Studio Environment
  • Hour 1. A C# Programming Tour
  • Hour 2. Navigating C#
  • Hour 3. Understanding Objects and Collections
  • Hour 4. Understanding Events
  • Part II. Building a User Interface
  • Hour 5. Building FormsPart I
  • Hour 6. Building FormsPart II
  • Hour 7. Working with the Traditional Controls
  • Hour 8. Advanced Controls
  • Hour 9. Adding Menus and Toolbars to Forms
  • Hour 10. Drawing and Printing
  • Part III. Making Things HappenProgramming!
  • Hour 11. Creating and Calling Methods
  • Hour 12. Using Constants, Data Types, Variables, and Arrays
  • Hour 13. Performing Arithmetic, String Manipulation, and Date/Time Adjustments
  • Hour 14. Making Decisions in C# Code
    • Making Decisions Using if Statements
    • Evaluating an Expression for Multiple Values Using switch
    • Branching Within Code Using goto
    • Summary
    • Q&A
    • Workshop
  • Hour 15. Looping for Efficiency
  • Hour 16. Debugging Your Code
  • Hour 17. Designing Objects Using Classes
  • Hour 18. Interacting with Users
  • Part IV. Working with Data
  • Hour 19. Performing File Operations
  • Hour 20. Controlling Other Applications Using Automation
  • Hour 21. Working with a Database
  • Part V. Deploying Solutions and Beyond
  • Hour 22. Deploying a Solution
  • Hour 23. Introduction to Web Development
  • Hour 24. The 10,000-Foot View
  • Appendix A. Answers to Quizzes/Exercises

Hour 14. Making Decisions in C# Code

In Hour 11, "Creating and Calling Methods," you learned how to separate code into multiple methods to be called in any order required. But if you had to separate each small code routine into its own method, your projects would quickly become unmanageable. Instead of creating numerous methods, you can use decision-making techniques to execute or omit specific lines of code within a single method. Decision-making constructs or coding structures allow you to execute (or omit) code based on the current situation, such as the value of a variable. C# includes two constructs that allow you to make any type of branching decision you can think of: if…else and switch.

In this hour, you'll learn how to use the decision constructs provided by C# to perform robust yet efficient decisions in C# code. In addition, you'll learn how to use the goto statement to redirect code. You'll probably create decision constructs in every application you build, so the quicker you master these skills, the easier it will be to create robust applications.

The highlights of this hour include the following:

• Making decisions using if statements
• Expanding the capability of if statements using else
• Evaluating an expression for multiple values using the switch statement
• Redirecting code flow using goto

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