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C Sharp Events Assignment Help
EVENTS
- It is an action of an user
- eg. Pressing key, clicking mouse button, moving mouse around the screen
- Sometimes it can be notifications by the system
- The software has to react to the events when it happens
- eg. Interrupts
- It mainly used for interprocess communications
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Events along with delegates
- The model of publisher and subscriber is used in Events
- The classNamewhich has an event is called publisher className
- It is mainly used to publish an event
- The classNamewhich accepts an event is treated as subscriber className
- Declaration of an event presents inside a classNameand which is linked to the event handlers surrounded in the same classNameor may be in an another classNameusing delegates
- The publisher object has the description of an event as well as delegate
- It also has an event delegate linkages
- It calls the attention of an event
- Its well informed to an another objects
- The subscriber object which acknowledges events and offers an event handler
- Publisher classNamedelegate calls the function that is subscriber classNameevent handler
Declaring Events
- It is to be followed that the type of a delegate for an event should be declared in order to declare an event within a className
Example
- public delegate string MyDelegate ( sting str);
- Using the event keyword, an event is declared
- event MyDelegate MyEvent
Example
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