Re: Delphi type events in C#

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Hi John,

have a look at these examples, they are pretty good
to understand:

http://msdn.microsoft.com/en-us/library/aa645739(VS.71).aspx

Thats a good one (just flying over it, looks good):

http://www.akadia.com/services/dotnet_delegates_and_events.html

regards

Kerem

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"JM" <me@xxxxxxxx> schrieb im Newsbeitrag news:eUkLIHGoJHA.2272@xxxxxxxxxxxxxxxxxxxxxxx
Hi,

Being a Delphi programmer from way back (14 years) and new to C#, I was wondering if someone would be kind enough to explain how to create events in C# for non-visual controls/classes.

In Delphi, it's similar to..

procedure TMyNewEvent (Sender: TObject; MyStream: TStream; var MyFlag: boolean) Of Object;

In the containing class, it looks sort of like..

MyClass = class(TObject); // TPersistent or any TObject based class..
private
FOnMyEvent: TMyNewEvent;
protected
procedure DoMyEvent(Sender: TObject; AStream: TStream; var AFlag: boolean);
property OnMyNewEvent: TOnMyEvent Read FOnMyEvent Write DoMyEvent;
published
..
end;

And is then written as..

procedure MyClass.DoMyEvent(Sender: TObject; AStream: TStream; var AFlag: boolean);
begin
// do something here..
If Assigned(FOnMyEvent) Then
FOnMyEvent(Self, AStream, AFlag);
end;

In C#'lish, what would it look like?

I'm guessing callbacks/delegates or something similarly foreign to me.

I've only been looking at C# a few weeks and its similarities to Delphi are really quite remarkable in some areas..but, not this one.

Thanks in advance.

John McTaggart








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