About delegates and events?
Answers were Sorted based on User's Feedback
Answer / anil chauhan
In C# delegate is a class which contain the referance of a
function. or we can say that it is an function pointer.
and Event are the action performed by the user such as
mouse click elc.
Is This Answer Correct ? | 6 Yes | 0 No |
Answer / kishoreg
Delegates in C#
If we look at C++ there is a feature called callback
function. This feature uses Pointers to Functions to pass
them as parameters to other functions. Delegate is a
similar feature but it is more type safe, which stands as a
stark contrast with C++ function pointers. A delegate can
hold reference/s to one more more functions and invoke them
as and when needed.
Any delegate is inherited from base delegate class of .NET
class library when it is declared. This can be from either
of the two classes from System.Delegate or
System.MulticastDelegate
If the delegate contains a return type of void, then it is
automatically aliased to the type of
System.MulticastDelegate
Events in c#
Delegate usefulness does not just lie in the fact that it
can hold the references to functions but in the fact that
it can define and use function names at runtime and not at
compile time. A large goal of design delegates is their
applicability in events model of .Net. Events are the
actions of the system on user manipulations (e.g. mouse
clicks, key press, timer etc.) or any event triggered by
the program
Example can be seen at
http://www.codersource.net/csharp_delegates_events.html
Is This Answer Correct ? | 6 Yes | 2 No |
please exaplain gridview and what are the process available for it. how to add the row number automatically? is it possible to add child controls ?
Can multiple catch blocks be executed?
Can I call a virtual method from a constructor/destructor?
Which of these statements correctly declares a two-dimensional array in c#?
What is a verbatim string literal and why do we use it?
What is polymorphism c# example?
What is class method c#?
Will finally block get executed if the exception had not occurred?
What is the use of base keyword? Tell me a practical example for base keyword’s usage?
How we free the memory in C#.NET.
Can int be null in c#?
What is the difference between array and arraylist c#?