[RESOLVED] [2005] OverflowException was unhandled

[Mark103]

Hi guys

I have trouble with the code I have received. I do not understand with the sense at all, the code suppose to be correct and they suppose to be reading the size of the image on my hard disk but the error code shows it didn't make any sense



Here it the code:

        Dim D As New IO.DriveInfo("C")
        Dim Size As Integer = CInt(D.AvailableFreeSpace)
        Size /= 1073741824
        Label16.Text = CStr(Size) & "GB"

Error I have received: Arithmetic operation resulted in an overflow.




Any idea?




Thanks,
Mark

[Tom Sawyer]

The integer datatype has a maximum value of 2,147,483,647. If you've got more free space than that, it'll throw this error.

The AvailableFreeSpace property returns a Long datatype, which holds more and you should change your size variable to that.

[Mark103]

Thanks for your response, I have full space available which I have 5,558,483,647. That suppose to be working correctly otherwise I get the same error.



However, any situation to get this resolve??



Thanks,
Mark

The integer datatype has a maximum value of 2,147,483,647. If you've got more free space than that, it'll throw this error.

The AvailableFreeSpace property returns a Long datatype, which holds more and you should change your size variable to that.

[Tom Sawyer]

What more do you need to get it resolved?

You're trying to put a number into an integer that's larger than the largest number allowed in an integer. That can't be done. You need to use a long.

[Clanguage]

If you were using Option Strict you would get the message
Option Strict disallow the converrsion from Double to Integer.
I wish MS had made this Option on by default.

[Mark103]

Well, that's the only small little things that I need to get resolve with. Can you post any other better code that it will works better than this one??




Thanks,
Mark

What more do you need to get it resolved?

You're trying to put a number into an integer that's larger than the largest number allowed in an integer. That can't be done. You need to use a long.

[Tom Sawyer]

Well, that's the only small little things that I need to get resolve with. Can you post any other better code that it will works better than this one??

Not really, it's a pretty basic operation that you can't make much simpler.

I suppose you could put the math on one line like:

Dim size as Long = D.AvailableFreeSpace / 1073741824

That wouldn't really make it any better, though.

[Shaggy Hiker]

Dim size as Long = CLong(D.AvailableFreeSpace / 10737418)

[Mark103]

Thank you very much, now I can see the problem are fixed!



Thanks for your help. Please don't forget to rate me as you can



Thanks,
Mark