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by: Peter Berry |
last post by:
I was surprised and somewhat disappointed by the fact that you cannot declare types in an interface. I discovered this when defining an interface that included events, where the definition of the delegates had to be placed outside the definition of the interface. To me, the delegate definition is an integral part of the interface definition. Also, I could imagine cases where one would like to define enums and structs in interfaces as well (to be...
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by: Ohad Young |
last post by:
Hi,
I have an interface with an event.
I'd like to explicitly implement the interface by a certain class.
However, I received the following error:
"An explicit interface implementation of an event must use property syntax"
Here is a code sample:
public interface IFoo
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by: Derrick |
last post by:
How does one declare an event within an interface, so that every class which
implements that interface must implement that event? I think I just need to
specifiy the actual event as I would a function, but what about the
delegate?
Up to now, all my interfaces have only dealt with properties and functions.
Here's basically what I want to do (for example):
public interface IFoo
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by: Ole Hanson |
last post by:
I am accessing my database through an interface, to allow future
substitution of the physical datastore - hence I would like to declare in my
Interface that my DAL-objects implementing the interface and accessing the
datastore MUST pass in a UserToken in the constructor of the object.
Is this not possible?
Am I forced to add the UserToken as a property on the object instead?
/Ole
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by: Alex Sedow |
last post by:
Why interface-event-declaration does not support multiple declarators like
event-declaration?
Grammar from C# spec:
variable-declarators:
variable-declarator
variable-declarators "," variable-declarator
variable-declarator:
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by: Anthony Yott |
last post by:
Anyone have an example of defining a custom event (i.e custom delegate) in an
interface?
--
Anthony Yott
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by: Charles Law |
last post by:
I have a class, which implements an interface. Let's say, that the interface
looks something like
Public Interface IEventSinks
Sub ValueChanged(sender As Object, e As ValueChangedEventArgs)
Sub StateUpdated(sender As Object, e As StateUpdatedEventArgs)
End Interface
In practice, the interface contains many more event handlers like this, but
you get the picture.
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by: Matt F. |
last post by:
I have an abstract class that about a dozen sub-classes inherit from. I
want to enforce that each sub-class shadows an event in the abstract class,
but can't quite figure out how to do this.
Basically, all of the inherited classes deal with data in some way or
another. I need to make sure that when the data is changed on any of those
classes, they raise an event called "DataChanged", and have that enforced in
some way from the abstract...
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by: hoofbeats95 |
last post by:
I don't think this should be this complicated, but I can't figure it
out. I've worked with C# for several years now, but in a web
environment, not with windows form. I have a form with a query button
on it. If the query returns multiple results, a new window is opened
with a grid containing the results. When the user double clicks on
the desired row in the grid, I want the first form to populate with
the correct data. I don't know how...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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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: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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: 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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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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