DriveInfo.GetDrives使用错误备忘

DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo info in allDrives)
{
if (info.DriveFormat == "FAT")
{
//Do something...
}
}

错误提示

未处理的异常:  System.IO.IOException: 设备未就绪。

   在 System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

   在 System.IO.__Error.WinIODriveError(String driveName, Int32 errorCode)

   在 System.IO.DriveInfo.get_DriveFormat()

   在 DriveInfoHelper.Program.Main(String[] args)

改正，访问设备的属性前要判断设备是否就绪。

DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo info in allDrives)
{
if (info.IsReady
&& info.DriveFormat == "FAT")
{
//Do something...
}
}