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You're reading from Beginning C# 7 Hands-On ?????? The Core Language Learn the C# language by coding it element by element

Product type Paperback

Published in Aug 2017

Publisher

ISBN-13 9781788296540

Length 566 pages

Edition 1st Edition

Languages

Tools

Visual Studio

Concepts

Programming Language

Author (1):

Tom Owsiak

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Table of Contents (64) Chapters

Title Page

Credits

About the Author

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Preface

1. Why C# and How to Download and Install the Visual Studio Community Edition FREE CHAPTER

2. Customizing Visual Studio to Make it Feel More Personal

3. Creating and Running Your First Page

4. Creating and Running a Page That Incorporates C#

5. Creating and Using a Single Variable

6. String Interpolation and Updating Visual Studio

7. Formatting Output Strings for More Professional Results

8. Using Variables and Data Types

9. Computed Variables and Basic Math

10. Interacting with Users Through the Web Page

11. Using Method Chaining to Write More Compact Code

12. Reacting to a Single Condition with If/Else Blocks

Adding checkbox to your code

13. Making a Variable Grow by Adding 1

14. Repeating Blocks of Code with While Loops

15. Repeating Blocks of Code with For Loops

16. Iterating Over Collections with foreach Loops

17. Examining Multiple Variable Values with Switch Blocks

18. Improving Input Processing with TryParse

19. Replacing If/Else Blocks with the Ternary Operator

20. Operators That Evaluate and Assign in Place

21. Checking Two Conditions with the Logical AND Operator

22. Checking Two Conditions with the Logical OR Operator

23. Declaring, Setting, and Reading Arrays

24. Iterating Over Arrays with foreach and for Loops

25. Creating and Using a Simple Method

26. Passing Arrays into Methods

27. Reference Type and Value Type Variables

28. Creating More Flexible Methods with the params Keyword

29. Creating More Flexible Functions with the out Keyword

30. Combining the ref and out Keywords to Write Flexible Functions

31. The out keyword in C# 7

32. Multidimensional Arrays

33. Writing Easier Code with the Var and Dynamic Keywords

34. Creating a Class with a Constructor and a Function

35. Creating a Class with a Static Method

36. Creating a Class with an Object Property

37. Creating a Class with Static Fields, Functions, and Properties

38. Centralizing Common Code with Inheritance

39. Centralizing Default Code with Virtual Functions

40. Model Concepts with Abstract Classes

41. Using Custom Types as Return Types

42. Using Lists to Operate on Data Efficiently

43. Writing Less Code with Polymorphism

44. Using Interfaces to Express Common Behaviors

45. Iterating over Instances with Indexers

46. Building Stabler Apps with Exception Handling

47. Using Named and Optional Parameters

48. Using the Null Coalescing Operator to Write Stabler Applications

49. Overloading Operators to Perform Custom Operations

50. Using Enumerations to Represent Named Constants

51. Creating and Using Namespaces

52. Structs, Random Points, and Sleeping Threads

53. Declaring, Creating, and Using Delegates

54. Switch Blocks with when

55. Switch Blocks with Objects in C# 7.0

56. Tuples

57. Local functions in C# 7.0

58. Throwing Exceptions

Setting up Visual C# to deal with a variable

Remember from the previous chapter that there's a Label control involved; be sure that you have that up. Start by doing the following:

Switch to the Design view, by clicking the button in the lower-left corner. Your screen should look like the one shown in the following screenshot:

Figure 2.3.1: Visual C# Design view

Note

If you are missing Toolbox, remember to click on View and then on Toolbox (press Ctrl+Alt+X if you prefer to use key combinations), and then drag and drop Label into the Design view.

In the next stage, go back to the Source view.
Name it sampLabel as before.
Go into Default.aspx.cs on the right-hand side, as shown in the following screenshot:

Figure 2.3.2: Our Default.aspx.cs view

Variables represent change

The code that we are going to create will be very basic and deal with variables. The first question is, ultimately, why introduce a variable in the first place? This is an important aspect. It is usually based on an observation that...