How to this in csharp

[RA]

I have the follwoing:

FILE_FLAG = 0x8;
DIR_FLAG=0x4;

NewFlag = FILE_FLAG | DIR_FLAG;

I need to find if FILE_FLAG exists in NewFlag. How to write this in csharp?


Thanks.

 

[Miha Markic]

Something like this:
const int FILE_FLAG = 0x08;

const int DIR_FLAG = 0x4;

int NewFlag = FILE_FLAG | DIR_FLAG;

bool hasFileFlag = NewFlag & FILE_FLAG) == FILE_FLAG;

As an alternative to const you might create an enum with FILE_FLAG and
DIR_FLAG.

 

[William Ryan]

If it's an enum, mark it with the [Flags] attribute. Later, you can use the
Enum.ToString("F") formatter which will show you everything that was passed
in as a bit flag. you could use an indexof for instance and determine its
existence.

This may help:

http://www.knowdotnet.com/articles/bitflags.html

 

[Nick Malik]

you can do this the same way that you would in C

if ((NewFlag & FILE_FLAG) == FILE_FLAG)
{
// it does
}

--- Nick