Enum flags

[Matt Burland]

I wanted to set up a enum to represent certain properties of an object that
can be combined. So I'm using the FlagAttribute with my enum and adding them
to by objects with | (or). But what is the right way to get them back (i.e.
to check it this object has a certain flag set)? I tried:

(MyObj.Properties & MyProps.Prop1) == MyProps.Prop1

But that doesn't work right. What gives?

Thanks

Matt

[Mattias Sjögren]

Matt,

(MyObj.Properties & MyProps.Prop1) == MyProps.Prop1

But that doesn't work right. What gives?

In what way does it not work? How did you define your enum? What's the
value of Prop1?

Mattias

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[100]

Hi Matt

(MyObj.Properties & MyProps.Prop1) == MyProps.Prop1

This is the right way to chack the flags.
The problem I guess is in MyProps enum declaration.
You have to defined like this

[Flags]
enum MyProps
{
Prop1 = 1,
Prop2 = 2,
Prop3 = 4,
Prop4 = 8
//and so on
}

Adding FalgsAttribute attribute doesn't set your enum values to be powers
of 2. If you have overlapping flags that checking may not work.

HTH
B\rgds
100

[Matt Burland]

Yeap, that was it. It just dawned on me a minute ago. Thanks for the
response.

"100" <10*@100.com> wrote in message
news:%2***************@TK2MSFTNGP11.phx.gbl...

Hi Matt

(MyObj.Properties & MyProps.Prop1) == MyProps.Prop1

This is the right way to chack the flags.
The problem I guess is in MyProps enum declaration.
You have to defined like this

[Flags]
enum MyProps
{
Prop1 = 1,
Prop2 = 2,
Prop3 = 4,
Prop4 = 8
//and so on
}

Adding FalgsAttribute attribute doesn't set your enum values to be powers
of 2. If you have overlapping flags that checking may not work.

HTH
B\rgds
100