// Find the index of the particular DeviceInfoData for the instanceId.
private static int GetIndexOfInstance(SafeDeviceInfoSetHandle handle, DeviceInfoData[] diData, string instanceId)
{
const int ERROR_INSUFFICIENT_BUFFER = 122;
for (int index = 0; index <= diData.Length - 1; index++)
{
StringBuilder sb = new StringBuilder(1);
int requiredSize = 0;
bool result = NativeMethods.SetupDiGetDeviceInstanceId(handle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize);
if (result == false && Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
sb.Capacity = requiredSize;
result = NativeMethods.SetupDiGetDeviceInstanceId(handle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize);
}
if (result == false)
{
throw new Win32Exception();
}
if (instanceId.Equals(sb.ToString()))
{
return(index);
}
}
// not found
return(-1);
}
// Find the index of the particular DeviceInfoData for the instanceId.
private static int GetIndexOfInstance(SafeDeviceInfoSetHandle handle, DeviceInfoData[] diData, string instanceId)
{
const int ERROR_INSUFFICIENT_BUFFER = 122;
for (int index = 0; index <= diData.Length - 1; index++)
{
StringBuilder sb = new StringBuilder(1);
int requiredSize = 0;
bool result = NativeMethods.SetupDiGetDeviceInstanceId(handle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize);
if (result == false && Marshal.GetLastWin32Error() == ERROR_INSUFFICIENT_BUFFER)
{
sb.Capacity = requiredSize;
result = NativeMethods.SetupDiGetDeviceInstanceId(handle.DangerousGetHandle(), ref diData[index], sb, sb.Capacity, out requiredSize);
}
if (result == false)
throw new Win32Exception();
if (instanceId.Equals(sb.ToString()))
{
return index;
}
}
// not found
return -1;
}
