how can I set an enum to be null?

[jamie]

I have an enumerated type

public enum Measured

{

N,
}

when I create a variable of that type

private Measured measuredVar;

I can easily set it to be N with measuredVar = Measured.N;

However sometimes I want measured to be null. Is this possible?

jamie

[Bruce Wood]

In .NET 1.1, no... you had to create a value in your enum series for
"not specified."

In .NET 2.0, you should use nullable types. Declare your variable like
this:

private Measured? measuredVar;

The question mark indicates that the value is nullable.

[Göran Andersson]

No. An Enum is a value type, not a reference type, so there is no
reference to set to null.

In .NET 2.0 you can use a nullable variable:

private Measured? measuredVar;

Now you can set measuredVar to Measured.N value or to null.
jamie wrote:

I have an enumerated type

public enum Measured

{

N,
}

when I create a variable of that type

private Measured measuredVar;

I can easily set it to be N with measuredVar = Measured.N;

However sometimes I want measured to be null. Is this possible?

jamie

[Alexander Todorovic]

Hello Jamie,

enum is a value type. You cannot set it to null.
--
Alexander Todorovic
"jamie" wrote:

I have an enumerated type

public enum Measured

{

N,
}

when I create a variable of that type

private Measured measuredVar;

I can easily set it to be N with measuredVar = Measured.N;

However sometimes I want measured to be null. Is this possible?

jamie

[Lucian Wischik]

"jamie" <st*********@no spam.nospam> wrote:

I have an enumerated type
public enum Measured { N, ..}
when I create a variable of that type
private Measured measuredVar;
I can easily set it to be N with measuredVar = Measured.N;
However sometimes I want measured to be null. Is this possible?

I think that best practise in this case is

public enum Measured {None=0, N, M, ...};

This way,
Measured x = default(Measure d);
will product x == Measured.None.

I think that using nullable types for this would not be worth it.

--
Lucian