Hi Guys
I'm sure there is a plausible explanation for this, but ...
<code>
Public Enum Test
Abra = 5
Cadabra = 76
End Enum
Dim t as Test
t = Test.Cadabra
</code>
At the end of this I expect t to contain 76, but it doesn't. It contains
Cadabra.
In the command window, I get the following
?t
Cadabra
Alternatively,
?CInt(t)
76
Why do I have to explicitly convert to Int? After all, I thought this was
just a good way to get the intellisense to prompt me with values for t when
I type
t =
Can anyone explain?
TIA
Charles 11 1207
* "Charles Law" <bl***@nowhere.com> scripsit: I'm sure there is a plausible explanation for this, but ...
<code> Public Enum Test Abra = 5 Cadabra = 76 End Enum
Dim t as Test
t = Test.Cadabra </code>
At the end of this I expect t to contain 76, but it doesn't. It contains Cadabra.
'Cadabra' is a constant with value 76.
In the command window, I get the following
?t Cadabra
Alternatively,
?CInt(t) 76
Why do I have to explicitly convert to Int? After all, I thought this was just a good way to get the intellisense to prompt me with values for t when I type
I think the console will simply call the "object's" 'ToString' method
which will return the name of the constant for an enumeration (AFAIR).
--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>
"Charles Law" <bl***@nowhere.com> schrieb Hi Guys
I'm sure there is a plausible explanation for this, but ...
<code> Public Enum Test Abra = 5 Cadabra = 76 End Enum
Dim t as Test
t = Test.Cadabra </code>
At the end of this I expect t to contain 76, but it doesn't. It contains Cadabra.
In the command window, I get the following
?t Cadabra
Alternatively,
?CInt(t) 76
Why do I have to explicitly convert to Int? After all, I thought this was just a good way to get the intellisense to prompt me with values for t when I type
t =
Can anyone explain?
If you print the value of an enum variable, the member name is shown because
that's what you are (or I am) usually interested in. The main reason for
using enums is being able to use a name instead of having to remember a
numeric value. Still you can use Cint to get the value behind.
--
Armin http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
Hi Herfried
Ah, but why does the following do the same?
<code>
Dim str As String
str = String.Format("t={0}", t)
</code>
str now contains "t=Cadabra". It is very painful, not to say error prone if
I have to remember to write
<code>
Dim str As String
str = String.Format("t={0}", CInt(t))
</code>
Or is that what you would expect?
Charles
"Herfried K. Wagner [MVP]" <hi***************@gmx.at> wrote in message
news:%2****************@TK2MSFTNGP11.phx.gbl... * "Charles Law" <bl***@nowhere.com> scripsit: I'm sure there is a plausible explanation for this, but ...
<code> Public Enum Test Abra = 5 Cadabra = 76 End Enum
Dim t as Test
t = Test.Cadabra </code>
At the end of this I expect t to contain 76, but it doesn't. It contains Cadabra.
'Cadabra' is a constant with value 76.
In the command window, I get the following
?t Cadabra
Alternatively,
?CInt(t) 76
Why do I have to explicitly convert to Int? After all, I thought this
was just a good way to get the intellisense to prompt me with values for t
when I type
I think the console will simply call the "object's" 'ToString' method which will return the name of the constant for an enumeration (AFAIR).
-- Herfried K. Wagner [MVP] <http://www.mvps.org/dotnet>
Charles,
In addition to the others comments: Why do I have to explicitly convert to Int? After all, I thought this was just a good way to get the intellisense to prompt me with values for t
when I type
Don't think of an Enum in terms of its implementation!
Don't think of Enums as integers! Think of Enums as distinct named constants
that are of that specific Enum type. As that is IMHO what the intent of
Enums are. If you want integer constants use the Const keyword.
Enums just happen to be implemented as Integers. (which for performance
reasons make sense, otherwise it does not make sense, I can see lots of
value in String enums or Char enums!)
In your example: Cadabra is a specific value for Test, as is Abra.
Hope this helps
Jay
"Charles Law" <bl***@nowhere.com> wrote in message
news:e6**************@tk2msftngp13.phx.gbl... Hi Guys
I'm sure there is a plausible explanation for this, but ...
<code> Public Enum Test Abra = 5 Cadabra = 76 End Enum
Dim t as Test
t = Test.Cadabra </code>
At the end of this I expect t to contain 76, but it doesn't. It contains Cadabra.
In the command window, I get the following
?t Cadabra
Alternatively,
?CInt(t) 76
Why do I have to explicitly convert to Int? After all, I thought this was just a good way to get the intellisense to prompt me with values for t
when I type
t =
Can anyone explain?
TIA
Charles
* "Charles Law" <bl***@nowhere.com> scripsit: Ah, but why does the following do the same?
<code> Dim str As String
str = String.Format("t={0}", t) </code>
str now contains "t=Cadabra". It is very painful, not to say error prone if I have to remember to write
<code> Dim str As String
str = String.Format("t={0}", CInt(t)) </code>
Or is that what you would expect?
I would expect that.
--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>
Thanks Jay, and everyone else for the responses.
I see what it is doing now, and I also use enums in the way you describe. I
will just have to be careful when I want the actual value of the enum.
Cheers
Charles
"Jay B. Harlow [MVP - Outlook]" <Ja************@msn.com> wrote in message
news:uS**************@tk2msftngp13.phx.gbl... Charles, In addition to the others comments:
Why do I have to explicitly convert to Int? After all, I thought this
was just a good way to get the intellisense to prompt me with values for t when I type
Don't think of an Enum in terms of its implementation!
Don't think of Enums as integers! Think of Enums as distinct named
constants that are of that specific Enum type. As that is IMHO what the intent of Enums are. If you want integer constants use the Const keyword.
Enums just happen to be implemented as Integers. (which for performance reasons make sense, otherwise it does not make sense, I can see lots of value in String enums or Char enums!)
In your example: Cadabra is a specific value for Test, as is Abra.
Hope this helps Jay
"Charles Law" <bl***@nowhere.com> wrote in message news:e6**************@tk2msftngp13.phx.gbl... Hi Guys
I'm sure there is a plausible explanation for this, but ...
<code> Public Enum Test Abra = 5 Cadabra = 76 End Enum
Dim t as Test
t = Test.Cadabra </code>
At the end of this I expect t to contain 76, but it doesn't. It contains Cadabra.
In the command window, I get the following
?t Cadabra
Alternatively,
?CInt(t) 76
Why do I have to explicitly convert to Int? After all, I thought this
was just a good way to get the intellisense to prompt me with values for t when I type
t =
Can anyone explain?
TIA
Charles
"Charles Law" <bl***@nowhere.com> schrieb Hi Herfried
Ah, but why does the following do the same?
<code> Dim str As String
str = String.Format("t={0}", t) </code>
str now contains "t=Cadabra". It is very painful, not to say error prone if I have to remember to write
<code> Dim str As String
str = String.Format("t={0}", CInt(t)) </code>
Or is that what you would expect?
Also what I would expect.
Why do you use an enum if you are interested in the numeric values? (see
also my other post)
--
Armin http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
Hi Armin
So I get the advantage of intellisense. When I type
MyVal =
I want the convenience of a list popping up to choose from.
It is rare that I need the underlying value, as people have indicated, it is
not common to use them in this way. However, I have the case where a
parameter in a structure can take values from a set list, e.g.
Public Enum Special
Abra = &H1
Cadabra = &H2
End Enum
Public Structure MyStruct
Dim Param1 as Integer
Dim Param2 as Special
End Structure
Then, I may want to do this
Dim MyStructInstance As MyStruct
MyStructInstance.Param2 = Abra Or Cadabra
Should Param2 now contain 3? It probably will in this case. But what about
MyStructInstance.Param2 = Abra
Now, perhaps Param2 contains Abra. I haven't tried this, but this is the
type of thing I wish to do.
Am I going about this the wrong way? The values will not always be binary as
above, but sometimes. How would you do it?
Charles
"Armin Zingler" <az*******@freenet.de> wrote in message
news:eS*************@TK2MSFTNGP11.phx.gbl... "Charles Law" <bl***@nowhere.com> schrieb Hi Herfried
Ah, but why does the following do the same?
<code> Dim str As String
str = String.Format("t={0}", t) </code>
str now contains "t=Cadabra". It is very painful, not to say error prone if I have to remember to write
<code> Dim str As String
str = String.Format("t={0}", CInt(t)) </code>
Or is that what you would expect?
Also what I would expect.
Why do you use an enum if you are interested in the numeric values? (see also my other post)
-- Armin
http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
"Charles Law" <bl***@nowhere.com> schrieb Hi Armin
So I get the advantage of intellisense. When I type
MyVal =
I want the convenience of a list popping up to choose from.
It is rare that I need the underlying value, as people have indicated, it is not common to use them in this way. However, I have the case where a parameter in a structure can take values from a set list, e.g.
Public Enum Special Abra = &H1 Cadabra = &H2 End Enum
Public Structure MyStruct Dim Param1 as Integer Dim Param2 as Special End Structure
Then, I may want to do this
Dim MyStructInstance As MyStruct
MyStructInstance.Param2 = Abra Or Cadabra
Should Param2 now contain 3? It probably will in this case. But what about
MyStructInstance.Param2 = Abra
Now, perhaps Param2 contains Abra. I haven't tried this, but this is the type of thing I wish to do.
Am I going about this the wrong way? The values will not always be binary as above, but sometimes. How would you do it?
I'd do it the same way. Just wanted to explain why the Enum member's name
instead of it's value is displayed by default.
--
Armin http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
Charles, So I get the advantage of intellisense. When I type
What I normally do in that case is define const members of a class
Public NotInheritable Class Special Const Abra As Integer = &H1 Const Cadabra As Integer = &H2
Private Sub New()
End Sub
End Class
MyVal = Special.
Of course I need to type the name of the class, however I then get the names
of the constants...
Note the Notinheritable prevents others from inheriting the Special class,
while Private Sub New prevents others form instantiating the Special class,
as Special is intended only to offer constants.
Hope this helps
Jay
"Charles Law" <bl***@nowhere.com> wrote in message
news:ep**************@TK2MSFTNGP12.phx.gbl... Hi Armin
So I get the advantage of intellisense. When I type
MyVal =
I want the convenience of a list popping up to choose from.
It is rare that I need the underlying value, as people have indicated, it
is not common to use them in this way. However, I have the case where a parameter in a structure can take values from a set list, e.g.
Public Enum Special Abra = &H1 Cadabra = &H2 End Enum
Public Structure MyStruct Dim Param1 as Integer Dim Param2 as Special End Structure
Then, I may want to do this
Dim MyStructInstance As MyStruct
MyStructInstance.Param2 = Abra Or Cadabra
Should Param2 now contain 3? It probably will in this case. But what about
MyStructInstance.Param2 = Abra
Now, perhaps Param2 contains Abra. I haven't tried this, but this is the type of thing I wish to do.
Am I going about this the wrong way? The values will not always be binary
as above, but sometimes. How would you do it?
Charles
"Armin Zingler" <az*******@freenet.de> wrote in message news:eS*************@TK2MSFTNGP11.phx.gbl... "Charles Law" <bl***@nowhere.com> schrieb Hi Herfried
Ah, but why does the following do the same?
<code> Dim str As String
str = String.Format("t={0}", t) </code>
str now contains "t=Cadabra". It is very painful, not to say error prone if I have to remember to write
<code> Dim str As String
str = String.Format("t={0}", CInt(t)) </code>
Or is that what you would expect?
Also what I would expect.
Why do you use an enum if you are interested in the numeric values? (see also my other post)
-- Armin
http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
A good bit of lateral thinking.
Thanks again.
Charles
"Jay B. Harlow [MVP - Outlook]" <Ja************@msn.com> wrote in message
news:%2****************@tk2msftngp13.phx.gbl... Charles,
So I get the advantage of intellisense. When I type What I normally do in that case is define const members of a class
Public NotInheritable Class Special Const Abra As Integer = &H1 Const Cadabra As Integer = &H2
Private Sub New() End Sub
End Class
MyVal = Special.
Of course I need to type the name of the class, however I then get the
names of the constants...
Note the Notinheritable prevents others from inheriting the Special class, while Private Sub New prevents others form instantiating the Special
class, as Special is intended only to offer constants.
Hope this helps Jay
"Charles Law" <bl***@nowhere.com> wrote in message news:ep**************@TK2MSFTNGP12.phx.gbl... Hi Armin
So I get the advantage of intellisense. When I type
MyVal =
I want the convenience of a list popping up to choose from.
It is rare that I need the underlying value, as people have indicated,
it is not common to use them in this way. However, I have the case where a parameter in a structure can take values from a set list, e.g.
Public Enum Special Abra = &H1 Cadabra = &H2 End Enum
Public Structure MyStruct Dim Param1 as Integer Dim Param2 as Special End Structure
Then, I may want to do this
Dim MyStructInstance As MyStruct
MyStructInstance.Param2 = Abra Or Cadabra
Should Param2 now contain 3? It probably will in this case. But what
about MyStructInstance.Param2 = Abra
Now, perhaps Param2 contains Abra. I haven't tried this, but this is the type of thing I wish to do.
Am I going about this the wrong way? The values will not always be
binary as above, but sometimes. How would you do it?
Charles
"Armin Zingler" <az*******@freenet.de> wrote in message news:eS*************@TK2MSFTNGP11.phx.gbl... "Charles Law" <bl***@nowhere.com> schrieb > Hi Herfried > > Ah, but why does the following do the same? > > <code> > Dim str As String > > str = String.Format("t={0}", t) > </code> > > str now contains "t=Cadabra". It is very painful, not to say error > prone if I have to remember to write > > <code> > Dim str As String > > str = String.Format("t={0}", CInt(t)) > </code> > > Or is that what you would expect?
Also what I would expect.
Why do you use an enum if you are interested in the numeric values?
(see also my other post)
-- Armin
http://www.plig.net/nnq/nquote.html http://www.netmeister.org/news/learn2quote.html
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