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VT.NET user group 2014-04-21: Delegation and C# delegates
Slides from my April 2014 presentation to the Vermont .NET user group.
VT.NET user group 2014-04-21: Delegation and C# delegates
- 1. Back to Basics: Delegates RobHale April 21, 2014
- 2. Goals ● Delegation patternreview ● Delegates in C#
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- 4. Delegation design pattern- simple Delegator Delegatee
- 5. Delegation design pattern -slightly more complicated Delegator IDelegatee Concrete Delegatee1 Concrete Delegatee2
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- 8. What are Delegates? ●Delegates are a reference type that defines a method signature ○ Like C++ function pointers but are type safe ○ Unlike method overloading, the return type is part of the signature ● They allow methods to be passed as parameters ● They can be used to define callback methods ● They can be chained together ○ For example, multiple methods can be called on a
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- 10. Resources Code from thispresentation ● https://github. com/robhalevt/20140421_VTdotNET_DelegationAndDelegates Other reading ● http://msdn.microsoft.com/en-us/library/vstudio/ms173171(v=vs.100).aspx ● http://msdn.microsoft.com/en-us/library/orm-9780596516109-03-09.aspx ● http://en.wikipedia.org/wiki/Delegation_pattern ● http://stackoverflow.com/questions/2044301/what-is-delegate