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by: emma middlebrook |
last post by:
Hi
Straight to the point - I don't understand why System.Array derives
from IList (given the methods/properties actually on IList).
When designing an interface you specify a contract. Deriving from an
interface and only implementing some of it means something is wrong:
either the interface specification is wrong e.g. not minimal or the
derivation is wrong e.g. the type can't actually honour this contract.
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by: Chris |
last post by:
Hi,
the specs for System.Array are :
public abstract class Array : ICloneable, IList, ICollection,
IEnumerable
but I can't use any of the functions presented by IList in my code
System.Array numbers = new int{1,2,5,6,7};
numbers.Add(1) --> NOT POSSIBLE Compiler error : 'System.Array' does
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by: cody |
last post by:
why arent there some util functions for IList for example Sort()?
--
cody
Freeware Tools, Games and Humour
http://www.deutronium.de.vu || http://www.deutronium.tk
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by: ad |
last post by:
Hi,
When I studied CSharp, I am confuse by IList, Collection and Array.
What is the relationships between them?
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by: Ldraw |
last post by:
I am returning an IList from a WebService Function that contains a custom
Class.
The class contains ID and Name properties. I can see these in the IList when
the data is returned. I tried to use ArrayList.Adapter to create a wrapper
around the IList so I could bind this to a combo box. No errors are thrown
but I cannot see the data in the arrayList nor can I bind to the ID or Name
property or retrieve this data from the IList or...
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by: Rene |
last post by:
According to the documentation, the List<T> type explicitly implements the
non generic IList interface.
The problem is that no matter how hard I look, I am not able to find this
implemetion on the List<T> type. Could some one tell me where can I find the
IList implementation?
Please note that the plase where I am looking for this implementation is
from the Visula Studio metadata information page. The page that shows up
when you...
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by: miked |
last post by:
Why are there still no covariant return types?
All searches reveal no workarounds accept for using an interface which is a
real pain. I wind up missing this capability almost every time I inherit a
class. The best workaround and one that I use is the new keyword and cast
the base class reference, but in my opinion this is a bad practice leading to
error prone code.
Can someone from MS chime in on this and provide some feedback?
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by: Veloz |
last post by:
Hi there
My question is regarding how to best return "collections" from a
method call. Should you return an actual object or an interesting/
appropriate interface of the object, to the caller? (This is not
really restricted to returning collections but that's the example I'm
going to focus on)
For example, let's say you have method that is going to return a "list
of books".
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by: huohaodian |
last post by:
Hi
I have some code something like.
public class Info
{
public static IList GetUser() { return User.GetUser();}
}
internal class User
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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: 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: 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: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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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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by: bsmnconsultancy |
last post by:
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