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...        }}