From delegates, to lamdas and expression trees your guide to elegant code in c#.net 4.0
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This document discusses delegates and expression trees in C#. Delegates allow methods to be passed as parameters and can be chained together. Delegates decouple code and allow methods to be used as parameters, enabling callbacks and event handlers. Expression trees represent executable code as a data structure and can be compiled to a delegate just-in-time or used to generate dynamic SQL queries. Expression trees are immutable, cacheable, and composable to complex behaviors.
From delegates, to lamdas and expression trees your guide to elegant code in c#.net 4.0
- 1. Microsoft MVP Chander Dhall
- 2. Delegates – WHAT? A type that defines a method signature
- 3. Delegates – WHAT? Function pointers but type safe
- 4. Delegates – WHAT? Allow methods to be passed as parameters
- 5. Delegates – WHAT? Can be chained together
- 6. Delegates – WHY? Decoupling Code
- 7. Delegates – WHY? Methods as Parameters
- 8. Delegates – WHY? Muli-casting NOT Multi-tasking
- 9. Delegates – WHY? Callbacks and Event Handlers
- 10. Delegates – WHY? LINQ
- 11. How to implement right? I can find all this online Where to implement? Why do I attend your talk? How to implement?
- 12. Demo
- 14. Expression Trees Form of Data structure References executable code
- 15. Expression Trees Expression Lambda Binary Constant Expression Expression Expression etc Expression <Tdelegate>
- 16. Linq To Objects C# code with IL using delegates Results lambda
- 17. Linq To Objects C# code with IL using Dynamic Sql lambda expression trees Results
- 18. Expression Trees Immutable so cacheable
- 19. Expression Trees Composable to complex behavior
- 20. Expression Trees Compiled to delegate JITed to native code