How to check if a drive exists

[nageswaragunupudi]

In xHarbour, these two function bypass the OS messages. I have not tested on Vista

1) DiskReady( cDisk, .F. )
2)
SetErrorMode(1)
IsDisk( cDisk )


I do not know if Harbour has similar functions

[Otto]

Hello NagesWaraRao,

thank you.
Yes, Set ErrorMode(1) with xHarbor is working.

local cDisk := "m"

// msginfo(DiskReady( cDisk, .F. ) )
Unresolved external '_HB_FUN_DISKREADY' referenced from


SetErrorMode(1)
msginfo(IsDisk( cDisk ) )

Regards,
Otto

[Maurizio]

Hello Otto

Why you don't use

nFile := fCreate( cDrive + 'TEST.TXT',0)
if nFile == -1
lReturn := FALSE
MsgInfo("Driver not present " )
else
fClose(nFile)
endif

Maurizio

[Otto]

Maurizio, with your code I get the same error msg.
Regards,
Otto

[Antonio Linares]

Otto,

> Antonio, the result is the same

Then the error may come from GetDriveType()

[nageswaragunupudi]

Hello NagesWaraRao,

thank you.
Yes, Set ErrorMode(1) with xHarbor is working.

local cDisk := "m"

// msginfo(DiskReady( cDisk, .F. ) )
Unresolved external '_HB_FUN_DISKREADY' referenced from


SetErrorMode(1)
msginfo(IsDisk( cDisk ) )

Regards,
Otto

All the functions I gave are working here with xHarbour.

With Harbour IsDisk( "A" ) is returning .t. or .f. without giving any OS message on XP. I do not know if this works with Vista too with Harbour.

[StefanHaupt]

Otto,

why don´t you use the function aDrives(), that comes with Fwh ? It collects all mounted drives. See sample testdrvs.prg in the sample dir.

You can easily check if a drive is available

Code: Select all

FUNCTION IsDrive (cDrive) // cDrive -> a:, c:, ....

LOCAL aDrv := aDrives()

RETURN (AScan (aDrv, cDrive)!=0)

It´s working in XP and Vista without any exception dialog

[Otto]

Hello Stefan, hello NagesWaraRao,

The aDrives-function executes the same exception dialog.

At the moment only xHarbour with ErrorMode(1) as NagesWaraRao suggested is working.

DiskReady( cDisk, .F. ) here gives a:
Unresolved external '_HB_FUN_DISKREADY' referenced from

But I don't use xHarbour in my project.

Regards,
Otto

[StefanHaupt]

The aDrives-function executes the same exception dialog.

I can´t undestand this, here it´s working fine (with harbour and xHarbour), did you try the sample testdrvs.prg ?



What OS do you use ?

[mgsoft]

Otto,

I have the same problem as you with Card readers.

How did you solve it?.


As this error, I have problems with protect.prg


thanks

[Otto]

Hello, if I remember well I have reinstalled the card reader.
Best regards,
Otto

[mgsoft]

Hi,

Thanks for the reply.

It is not a question of drivers.

When a card reader is installed, it creates an USB letter drive for each slot. When there is NO card inserted, you can see the unit in My PC. If you click on it, the OS gives an error that there is not disk inserted in.

If you use GetDiskFreeSpaceEx of If file refering to the that Unit, the OS gives an error that there is not disk inserted in.

http://img40.imageshack.us/i/errorusb.png/


How did you solve that?.

thanks

[Enrico Maria Giordano]

Try

Code: Select all

SETERRORMODE( 1 )

EMG

[mgsoft]

Hi Entico,


Seterrormode and DiskReady() are only in xHarbour, but I use Harbour.

Thanks

[Enrico Maria Giordano]

It is called WAPI_SETERRORMODE() in Harbour.

EMG