I have a class:
public static class HOW_GOOD
{
static string[] mstrHowGood =
{
"A",
"G",
"NTB",
"T"
};
public static string AWESOME
{
get
{
return mstrHowGood[0];
}
}
public static string GREAT
{
get
{
return mstrHowGood[1];
}
}
public static string NOT_TOO_BAD
{
get
{
return mstrHowGood[2];
}
}
public static string TERRIBLE
{
get
{
return mstrHowGood[2];
}
}
}
But I get an error when I use it as a return type
HOW_GOOD': static types cannot be used as return types
I tried to do this
Public class MyClass
{
public HOW_GOOD HowAreYouDoing(string MyName)
{
return HOW_GOOD.NOT_TOO_BAD;
}
}
Is there any way around this? Is this the "imporper programming" ?
Thanks in advance
Sanjay 10 16213
> public static class HOW_GOOD
Why is your class itself declared as static?
I don't think I've ever seen something like that done before.
I'm not even sure what that means for a class.
--
Adam Clauss
"Sanjay Pais" <sa****@nospam.com> wrote in message
news:ez**************@tk2msftngp13.phx.gbl... I have a class: public static class HOW_GOOD { static string[] mstrHowGood = { "A", "G", "NTB", "T" }; public static string AWESOME { get { return mstrHowGood[0]; } } public static string GREAT { get { return mstrHowGood[1]; } } public static string NOT_TOO_BAD { get { return mstrHowGood[2]; } } public static string TERRIBLE { get { return mstrHowGood[2]; } }
}
But I get an error when I use it as a return type HOW_GOOD': static types cannot be used as return types
I tried to do this Public class MyClass { public HOW_GOOD HowAreYouDoing(string MyName) { return HOW_GOOD.NOT_TOO_BAD; } }
Is there any way around this? Is this the "imporper programming" ?
Thanks in advance
Sanjay
Sanjay Pais <sa****@nospam.com> wrote: I have a class: public static class HOW_GOOD
<snip>
Is there any way around this? Is this the "imporper programming" ?
Yes. The point of a static class is that there are no instances of it -
you therefore could never have a variable of that type which had any
value other than null.
In your code, you have:
public HOW_GOOD HowAreYouDoing(string MyName)
{
return HOW_GOOD.NOT_TOO_BAD;
}
but the type of HOW_GOOD.NOT_TOO_BAD is not HOW_GOOD - it's string! You
should therefore declare the method to return a string, and all will be
fine.
What are you actually trying to accomplish?
--
Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Adam Clauss <ca*****@tamu.edu> wrote: public static class HOW_GOOD Why is your class itself declared as static? I don't think I've ever seen something like that done before. I'm not even sure what that means for a class.
It's a new feature of C# 2.0. It means there are no constructors (none
whatsoever - something impossible in C# v1), the class is final, and
all members (other than those inherited) must be static.
I'm not sure (having not installed the beta of VS 2005 yet) whether a
static class can derive from another class or not, although the
usefulness of it would be questionable even if you could.
--
Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
it started off by me wanting to create a string enum
public enum HOW_GOOD
{
AWESOME = "A",
GREAT= "G",
NOT_TOO_BAD = "NTB",
TERRIBLE="T"
}
i wanted to use this as a parameter/ return type for methods
Eg
public HOW_GOOD HowAreYouFeeling(string MyName)
{
return HOW_GOOD.NOT_TOO_BAD;
}
or
public string HowAreYouFeeling(HOW_GOOD m_HowGood)
{
return "Not Too Bad";
}
"Adam Clauss" <ca*****@tamu.edu> wrote in message
news:11*************@corp.supernews.com... public static class HOW_GOOD Why is your class itself declared as static? I don't think I've ever seen something like that done before. I'm not even sure what that means for a class.
-- Adam Clauss
"Sanjay Pais" <sa****@nospam.com> wrote in message news:ez**************@tk2msftngp13.phx.gbl...I have a class: public static class HOW_GOOD { static string[] mstrHowGood = { "A", "G", "NTB", "T" }; public static string AWESOME { get { return mstrHowGood[0]; } } public static string GREAT { get { return mstrHowGood[1]; } } public static string NOT_TOO_BAD { get { return mstrHowGood[2]; } } public static string TERRIBLE { get { return mstrHowGood[2]; } }
}
But I get an error when I use it as a return type HOW_GOOD': static types cannot be used as return types
I tried to do this Public class MyClass { public HOW_GOOD HowAreYouDoing(string MyName) { return HOW_GOOD.NOT_TOO_BAD; } }
Is there any way around this? Is this the "imporper programming" ?
Thanks in advance
Sanjay
"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om... It's a new feature of C# 2.0. It means there are no constructors (none whatsoever - something impossible in C# v1), the class is final, and all members (other than those inherited) must be static.
I'm not sure (having not installed the beta of VS 2005 yet) whether a static class can derive from another class or not, although the usefulness of it would be questionable even if you could.
So...
It is basically:
public class SomeClass
{
private SomeClass() { }
<members here>
}
With the execption that all members must be static?
Why did they even bother? I don't mean to come off rude... but I just don't
see where it would be particularly useful.
--
Adam Clauss
Adam Clauss <ca*****@tamu.edu> wrote: I'm not sure (having not installed the beta of VS 2005 yet) whether a static class can derive from another class or not, although the usefulness of it would be questionable even if you could. So... It is basically:
public class SomeClass { private SomeClass() { }
<members here> }
With the execption that all members must be static?
And without even a private constructor.
Why did they even bother? I don't mean to come off rude... but I just don't see where it would be particularly useful.
It's putting a common pattern directly into the language. It makes it
easier to make sure that you don't forget to put in the private
construtor, or make some members non-static accidentally.
As one who's got a few unit tests for classes where the unit tests
solely exist to make sure that the above is actually true, it would be
a nicer not to have to worry about it :)
--
Jon Skeet - <sk***@pobox.com> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om... It's putting a common pattern directly into the language. It makes it easier to make sure that you don't forget to put in the private construtor, or make some members non-static accidentally.
As one who's got a few unit tests for classes where the unit tests solely exist to make sure that the above is actually true, it would be a nicer not to have to worry about it :)
Interesting, thanks for explaining that.
--
Adam Clauss
Isn't that exactly what a Module is in VB? A static class in which
all members are static?
Yes.
"Chris Dunaway" <du******@gmail.com> schrieb im Newsbeitrag
news:11*********************@z14g2000cwz.googlegro ups.com... Isn't that exactly what a Module is in VB? A static class in which all members are static?
I think he's trying to simulate a enum that's not integer based, which is not
possible.
"Jon Skeet [C# MVP]" wrote: Sanjay Pais <sa****@nospam.com> wrote: I have a class: public static class HOW_GOOD
<snip>
Is there any way around this? Is this the "imporper programming" ?
Yes. The point of a static class is that there are no instances of it - you therefore could never have a variable of that type which had any value other than null.
In your code, you have:
public HOW_GOOD HowAreYouDoing(string MyName) { return HOW_GOOD.NOT_TOO_BAD; }
but the type of HOW_GOOD.NOT_TOO_BAD is not HOW_GOOD - it's string! You should therefore declare the method to return a string, and all will be fine.
What are you actually trying to accomplish?
-- 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
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