Events in C # are the same as the events in VB. But in C #, any class can generate a set of events, and any object can be bundled with these events. The event in C # is based on delegates. When designing events, it is usually considered delegates to accept two parameters: the first parameter is an object that causes an event, and the second parameter is an object containing an event argument.
Now we define a delegates for an event. When there is a new email, this event will be activated:
=== DELEGATE declaration ==============
Pubic Delegate Void NewMaileventHandler (Object Sender, NewMaileventargs E);
=== Event declaration =============
Public Event NewMaileventrandler OnnewmailHandler;
Attributes
The attribute in the C # is the same as the properties in the VB. Please see an example of a simple attribute:
Class test
{
PRIVATE STRING NAME;
Public String Name;
{
get
{
Return Name
}
set
{
Name = value;
}
}
}
The GET method and SET method are so-called "Accessor" methods.
We can also use the Virtual, Override or Abstract modifiers to declare attributes. Now let's set the properties:
Test T = New Test ();
T.NAME = "this is the name"
As in VB, to establish a read-only attribute, you can omit "get". Note that attributes can be inherited.
