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
  • Hour 15. Looping for Efficiency
    • Looping a Specific Number of Times Using for Statements
    • Using dowhile to Loop an Indeterminate Number of Times
    • Summary
    • Q&A
    • Workshop
  • 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

Summary

Looping is a powerful technique that allows you to write tighter code. Tighter code is code consisting of fewer lines, is more efficient, and is usually—but not always—more readable. In this hour, you learned to write for loops for situations in which you know the precise number of times you want a loop executed. Remember, it's not necessary to know the number of iterations at design time, but you must know the number at runtime to use a for loop. You learned how to use iterators to increment the counter of a for loop, and even how to exit a loop prematurely using break.

In this hour, you also learned how to use the very powerful do…while loop. The do…while loop enables you to create very flexible loops that can handle almost any looping scenario. You learned how evaluating expression in a do…while loop makes the loop behave differently than when evaluating the expression in a while…do loop. If a for loop can't do the job, some form of the do…while or while…do loop will.

In addition to learning the specifics about loops, you've seen firsthand how multiple solutions to a problem can exist. Often, one approach is clearly superior to all other approaches, although you may not always find it. Other times, one approach may be only marginally superior, or multiple approaches may all be equally applicable. Expert programmers are able to consistently find the best approaches to any given problem. With time, you'll be able to do the same.

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