Tips and Tricks To Improve Code Readability in C#

Transcript

1. P2P Code Academy Becoming a C# Warrior-Poet or Tips and Tricks To Improve Code Readability in C# 4 30th March
2. C#
3. Outline • Object Initializers • Named Arguments • Extension Methods • LINQ
4. Ye Olde Classic Constructor
5. Object Initializers vs Constructors
6. Object Initializers Uses Default Constructor!
7. Object Initializers. Benefits • Improved Readability • Less boiler-plate code – Don’t even need a constructor!
8. DEMO OBJECT INITIALIZERS
9. Collection Initializers
10. Named Arguments • Explicitly name method arguments
11. Named Arguments. Benefits What the heck is true?
12. Named Arguments. Benefits
13. Extension Methods Add methods to existing types: • No need to create derived type • No need to re-compile existing type • No need to modify original type • Just static methods in disguise!
14. Extension Methods. Syntax Special use of keyword this Look like instance methods!
15. Extension Methods Add a method to a primitive type Adding this method to the string class
16. Extension Methods Add a method to a primitive type Before After
17. DEMO EXTENSION METHODS
18. Extension Methods Add a method to a compiled custom type
19. LINQ Query language within C# and VB.NET • Very Expressive • Extensible • Integrated – LINQ to Objects – LINQ to SQL – LINQ to XML – LINQ to Entities
20. LINQ. Example Filtering a collection (People older than 30)
21. LINQ. Example Query Syntax Method Chain Syntax
22. DEMO LINQ
23. Summary • Object Initializers • Named Arguments • Extension Methods • LINQ
24. If you put it all together... Sonnet 138. The Passionate Pilgrim C# version while (myLove.Swears(that: ”She is made of truth”)) { do I.Believe(her); while (she.Lies()) she.Might(s => s.Think(I == ”some untutored youth”)); she.Might(s => s.Think(I == ”unskillful”)); ... }
25. C#
26. If you want to know more…
27. References • Object and Collection Initializers http://bit.ly/csharp-object-collection-initializer • Named Arguments http://bit.ly/csharp-named-arguments • Extension Methods http://bit.ly/csharp-extension-methods • LINQ http://bit.ly/linq-language-integrated-query
28. Thank you