[Windows] Fix possible ArgumentNullException when enumerating USB devices (qmk#445)

tzarc · tzarc · commit 78a549ffaae3 · 2024-02-03T12:34:07.000+11:00
diff --git a/windows/QMK Toolbox/Usb/UsbListener.cs b/windows/QMK Toolbox/Usb/UsbListener.cs
@@ -29,7 +29,7 @@ private void EnumerateUsbDevices(bool connected)
         {
             var enumeratedDevices = new ManagementObjectSearcher(@"SELECT * FROM Win32_PnPEntity WHERE DeviceID LIKE 'USB%'").Get()
                 .Cast<ManagementBaseObject>().ToList()
-                .Where(d => ((string[])d.GetPropertyValue("HardwareID")).Any(s => UsbIdRegex.Match(s).Success));
+                .Where(d => (d.GetPropertyValue("HardwareID") as string[])?.Any(s => UsbIdRegex.Match(s).Success) ?? false);
 
             if (connected)
             {

Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,7 @@ private void EnumerateUsbDevices(bool connected)`
`29`	`29`	`{`
`30`	`30`	`var enumeratedDevices = new ManagementObjectSearcher(@"SELECT * FROM Win32_PnPEntity WHERE DeviceID LIKE 'USB%'").Get()`
`31`	`31`	`.Cast<ManagementBaseObject>().ToList()`
`32`		`- .Where(d => ((string[])d.GetPropertyValue("HardwareID")).Any(s => UsbIdRegex.Match(s).Success));`
	`32`	`+ .Where(d => (d.GetPropertyValue("HardwareID") as string[])?.Any(s => UsbIdRegex.Match(s).Success) ?? false);`
`33`	`33`
`34`	`34`	`if (connected)`
`35`	`35`	`{`