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by: Jeffrey T. Smith |
last post by:
Back when the new J2SE1.5 features were announced, there was a
JavaLive community chat
(http://java.sun.com/developer/community/chat/JavaLive/2003/jl0729.html)
in which Neal Gafter explains the Sun stance on lack of support for
delegates:
.... There are serious semantic problems with trying to add delegates
to a language in a consistent way. The main problem is that once you
call the delegate, the original class instance is no longer...
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by: Sam |
last post by:
I’m just starting to learn delegates. I’m at the very beginning. If I understand correctly, delegates are for when you want to pass a function as a parameter. For example the client provides a custom function to be called in a provider class. My confusion is that you can already achieve this by interfaces and objects without delegates (which have a little more complicated syntax)
Here is an example without delegates. class Class1 and...
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by: LP |
last post by:
Hello!
I am still transitioning from VB.NET to C#. I undertand the basic concepts
of Delegates, more so of Events and somewhat understand AsyncCallback
methods. But I need some clarification on when to use one over another? If
anyone could provide any additional info, your comments, best practices, any
good articles, specific examples, etc.
Thank you
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by: AMDRIT |
last post by:
I am trying to understand Delegates and where/when to use them.
I can see one potential use of a delegate (on form closing, set the cancel
property in the event arguments.)
Does anyone have a link to a site that describes delegates using VB.Net in a
manner that doesn't require rocket science to become enlightened.
TIA
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by: =?Utf-8?B?Sko=?= |
last post by:
I have a logger component that logs to multiple sources, ie textfile,
eventlog etc.
and I have two methods that depending on where I call up my logger comp. one
of them will be called. For ex. if I throw an exception I want to call one
method and if I dont, I am just logging some info to eventlog, I will call
the other. Now i'm wondering would it make sense to use delegates, one for
each method to call methods in my window service? How...
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by: bharathreddy |
last post by:
Delegates
Here in this article I will explain about delegates in brief. Some important points about delegates. This article is meant to only those who already know delegates, it will be a quick review not a detailed one.
Delegates quite simply are special type of object, a delegate just contains the details of a method.
One good way to understanding delegates is by thinking of delegates as something that gives a name to a method...
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by: =?Utf-8?B?T2xkQ2FEb2c=?= |
last post by:
My question is regarding the use of delegates in C#. I see how .Net uses
delegates to wire event handlers to events. It’s an object created by a
single line of code by the system and that makes perfect sense to me. I
understand that there is a lot of code underneath that the system has created
that makes it all work, thereby making it pretty efficient for the programmer.
Outside of the use of delegates to wire event handlers, you can...
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by: Siegfried Heintze |
last post by:
I'm studying the book "Microsoft Visual Basic.NET Language Reference" and I
would like some clarify the difference between events and delegates. On page
156 I see a WinForms example of timer that uses the "WithEvents" and events.
There is another example on page 124 that shows how to use delegates to sort
an array.
I don't understand the difference between events and delegates. Are they
redundant features? How do I decide which to use?
...
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by: raylopez99 |
last post by:
They usually don't teach you in most textbooks I've seen that
delegates can be used to call class methods from classes that are
'unaware' of the delegate, so long as the class has the same signature
for the method (i.e., as below, int Square (int)).
Here is an example to show that feature. Note class "UnAwareClass"
has its methods Square and Cuber called by a class DelegateClass.
This is because these methods in UnAwareClass have the...
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by: raylopez99 |
last post by:
Hello all—
I’m trying to get the below to work and cannot get the format right.
It’s from this example: http://msdn.microsoft.com/en-us/library/8627sbea(VS.71).aspx
What it is: I’m trying to store multicast delegates in a hash table,
and then fire the delegates one of two ways (after registering/
creating the delegates, etc).
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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