WMI escape characters on string variable programatically

Question

i have this working query

ManagementObject pnpdevice = new ManagementObjectSearcher(String.Format(
"select * from Win32_PnPEntity where DeviceID='{0}'",
"USB\\\\VID_046D&PID_C52B&MI_00\\\\6&48E0D58&0&0000")).First();

where i just realized that i needed to use quadruple slashes for one slash: two to escape in c#, two to escape in wmi.

my problem is how to do this programmatically instead of by hand. typically i would of course use the @ in front of the string to escape, so this works as well:

ManagementObject pnpdevice = new ManagementObjectSearcher(String.Format(
"select * from Win32_PnPEntity where DeviceID='{0}'",
@"USB\\VID_046D&PID_C52B&MI_00\\6&48E0D58&0&0000")).First();

but how do i do that with a string variable?

ManagementObject pnpdevice = new ManagementObjectSearcher(String.Format(
"select * from Win32_PnPEntity where DeviceID='{0}'",
device["DeviceID"].ToString())).First();

this doesn't have any of the escapes i need, and fails as an invalid query. writing it @device["DeviceID"].ToString() does not work.

any ideas?

score 0 · Accepted Answer · answered Feb 27 '14 at 00:21

0

i'm dumb, it was easy, just needed to add a replace to the string.

ManagementObject pnpdevice = new ManagementObjectSearcher(String.Format(
    "select * from Win32_PnPEntity where DeviceID='{0}'",
    @device["DeviceID"].ToString().Replace("\\", "\\\\") )).First();

answered Feb 27 '14 at 00:21

Josh

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Just FYI, this would never work. `ManagementObjectSearcher` is not a collection and does not inherit `IEnumberable`, so you can't call `First()`. – Levi Fuller Apr 08 '15 at 21:50

WMI escape characters on string variable programatically

1 Answers1