2,892 questions
Thank you both Castorix and Viorel.
Actual problem was converting the NULL to String as highlighted by Viorel, and omitting the ToString did the trick.
Disk Infomration SD Card Issue with VB.Net using Win32_DiskDrive
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~OSD~
2,201
Reputation points
Hi,
I have following code to list the physical disk(s) information:
When there is SD card available, I get unhandled exception and VB app crashes. The information about the SD card can be gained with PowerShell as:
Can we modify the code somehow to exclude the disk if it's SD card or manage it in different to include SD card information as well?
Developer technologies | VB
{count} votes
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Viorel 122.6K Reputation points2021-03-11T10:31:33.22+00:00 Try replacing the Catch line with ‘Catch err as Exception’ and check if the error can be intercepted and you can get some more details. If possible, also show the PowerShell code that works.
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~OSD~ 2,201 Reputation points
2021-03-11T10:43:25.543+00:00 PowerShell:
"Get-CimInstance -ClassName CIM_DiskDrive |select DeviceID,Model,Size"And replacing Catch err As ManagementException with Catch err as Exception didn't seems to be helpful as now I can only see Physical Disk 1 (which is SD card slot) and nothing more... However, no error message popups.
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Viorel 122.6K Reputation points
2021-03-11T11:09:20.363+00:00 Do you mean that if you restore the Catch line, you will get again an unhandled exception and a crash?
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~OSD~ 2,201 Reputation points
2021-03-11T11:36:00.82+00:00 Catch err As ManagementException => error message popup for the unhandled exception, continue or exit.
Catch err as Exception => No popup, but no results /output when processing disk1 which is SD card.
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Viorel 122.6K Reputation points
2021-03-11T12:02:57.687+00:00 You probably forgot to look at err.Message in case of ‘Catch err As Exception’.
Maybe this details suggests writting queryDisk("Size")?.ToString, or just removing .ToString.
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~OSD~ 2,201 Reputation points
2021-03-11T13:30:06.193+00:00 100 % correct. When I remove .ToString, it do not complain anymore.
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Accepted answer
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~OSD~ 2,201 Reputation points
2021-03-11T13:54:04.17+00:00
2 additional answers
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Castorix31 90,686 Reputation points2021-03-11T10:29:05.237+00:00 SD Card Size is NULL, from your screencopy...
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~OSD~ 2,201 Reputation points
2021-03-11T10:42:40.59+00:00 Correct, there is no SD card available, but computer has SD card slot.
Possible to display properties even size is null /0? -
Castorix31 90,686 Reputation points
2021-03-11T10:49:28.633+00:00 It is probably because queryDisk("Size") that it crashes : you should add a test to check if it is NULL
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~OSD~ 2,201 Reputation points
2021-03-11T11:08:46.227+00:00 Correct, If I remove /comment the queryDisk("Size"), I have better results.
Do you have details / example of the test that should check for the Null? -
Castorix31 90,686 Reputation points
2021-03-11T11:35:59.93+00:00 Something like :
If (queryDisk("Size") IsNot Nothing) Then ' Display the size with queryDisk("Size").ToString() Else ' Display that size is empty End If
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~OSD~ 2,201 Reputation points
2021-03-11T09:45:42.86+00:00 Cannot upload code, getting following error message.
