If I dont specify the [Flags] attribute on an enum to be used as a bitfield
declared as 0,1,2,4,8... and so on, and use it as one normally would with |
and & operators, would it behave differently? 5 4395
Hi,
No.
FlagsAttribute has influence only on output, check this code (toggle the
Flags attribute to see the difference):
class Class1
{
[Flags]
public enum Flagator
{
One = 1,
Two = 2
}
[STAThread]
static void Main(string[] args)
{
Flagator ft = Flagator.One | Flagator.Two;
Console.WriteLine(ft.ToString());
Console.ReadLine();
}
}
--
Miha Markic [MVP C#] - RightHand .NET consulting & software development
miha at rthand com www.rthand.com
<di********@discussion.microsoft.com> wrote in message
news:OD**************@TK2MSFTNGP11.phx.gbl... If I dont specify the [Flags] attribute on an enum to be used as a
bitfield declared as 0,1,2,4,8... and so on, and use it as one normally would with
| and & operators, would it behave differently?
Ok so it just affects the ToString() method?
I thought it affected the & and | operators.
"Miha Markic [MVP C#]" <miha at rthand com> wrote in message
news:uv**************@TK2MSFTNGP10.phx.gbl... Hi,
No. FlagsAttribute has influence only on output, check this code (toggle the Flags attribute to see the difference): class Class1
{
[Flags]
public enum Flagator
{
One = 1,
Two = 2
}
[STAThread]
static void Main(string[] args)
{
Flagator ft = Flagator.One | Flagator.Two;
Console.WriteLine(ft.ToString());
Console.ReadLine();
}
}
-- Miha Markic [MVP C#] - RightHand .NET consulting & software development miha at rthand com www.rthand.com
<di********@discussion.microsoft.com> wrote in message news:OD**************@TK2MSFTNGP11.phx.gbl... If I dont specify the [Flags] attribute on an enum to be used as a bitfield declared as 0,1,2,4,8... and so on, and use it as one normally would
with | and & operators, would it behave differently?
As far as the math goes, no. The bitwise operators will still work
correctly. However, the Flags attribute changes the behaviour of ToString()
so that it displays the proper set(all the set flags) instead of simply one
or a simple number.
There is no guarentee that bitwise operators will work on enums without
flags in other languages.
<di********@discussion.microsoft.com> wrote in message
news:OD**************@TK2MSFTNGP11.phx.gbl... If I dont specify the [Flags] attribute on an enum to be used as a
bitfield declared as 0,1,2,4,8... and so on, and use it as one normally would with
| and & operators, would it behave differently?
<di********@discussion.microsoft.com> wrote: Ok so it just affects the ToString() method?
I thought it affected the & and | operators.
Not in C#, but another language *may* decide to only allow the & and |
operators to work with enums declared as Flags.
--
Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
I think thats how it should be for the operators, it makes no sense to use
bitwise operators on a non bitwise type.
I would also like to see some form of auto enumeration by base as an
attribute to it can automatically fill in 0,1,2,4,8 based on the order
unless I specify otherwise.
"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om... <di********@discussion.microsoft.com> wrote: Ok so it just affects the ToString() method?
I thought it affected the & and | operators.
Not in C#, but another language *may* decide to only allow the & and | operators to work with enums declared as Flags.
-- Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet If replying to the group, please do not mail me too This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Randy |
last post by:
I can't seem to find a clear example on how to use the FlagsAttribute. In
my example below shouldn't both message boxes show? Instead no messagebox
displays. I know that .NET will auto-number...
|
by: Horia Tudosie |
last post by:
Using Visual Studio 2003
This is to report a series of bugs regarding the FlagsAttribute and
(independently) the usage of interfaces in Web applications.
Let’s declare xColors type like:
...
|
by: Ken Varn |
last post by:
The following code snippet will not compile. I get an error C2337 saying
that the flags attribute is not found, however, if I remove the last
namespace System from the namespace tree, then it...
|
by: Nicolas |
last post by:
How do I set a FlagsAttribute to a run time created enum
I really need a FlagsAttribute for the enum as it will be use to trigger multiple choice
Thanks for the help
Function BuildEnum(ByVal...
|
by: Fariba |
last post by:
Hello ,
I am trying to call a mthod with the following signature:
AddRole(string Group_Nam, string Description, int permissionmask);
Accroding to msdn ,you can mask the permissions using...
| |
by: Charles Jenkins |
last post by:
I want to know if FontStyle.Bold is set in a font's Style property.
MS's help file is full of lovely examples of how to OR flags together in order to set the property, but as usual, seems to be...
|
by: Steven Nagy |
last post by:
So I was needing some extra power from my enums and implemented the
typesafe enum pattern.
And it got me to thinking... why should I EVER use standard enums?
There's now a nice little code...
|
by: Zytan |
last post by:
I know you can use enums as a bit field with , but,
when I use an enum without , I can still combine one
or more of them. There's no error in doing so. I thought enums were
strongly typed, such...
|
by: rajanipro |
last post by:
Please explain to me the following C# program, which I came across in MSDN help:
// enumFlags.cs
// Using the FlagsAttribute on enumerations.
using System;
public enum CarOptions
{
...
|
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...
|
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,...
| |
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...
|
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,...
|
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...
|
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...
|
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 ...
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence...
| |