怎么判断一个路径是文件夹，但不是磁盘或u盘移动硬盘等其他类型？

Question

使用拖拽功能，将外部项（文件夹和文件）拽进窗口，使用linq筛选拖拽项的含有的文件和文件夹，我发现使用Directoy.Exist方法筛选文件夹时，能把磁盘判定是文件夹类型，使用DriveInfo.GetDrives()获取磁盘可以解决，但是若用户是拖拽u盘到窗口话，就不能行了，还是会判定是文件夹类型，如何解决这个问题

var DirectoryList = (from string s in DragList
                            where Directory.Exists(s) == true
                            select s).ToList();

            DriveInfo[] a=DriveInfo.GetDrives();
            bool bool1= true;
            foreach(var i in DirectoryList)
            {
                if (a[0].Name == i)
                {
                    bool1 = false;
                    break;
                }
            }

Answer 1

参考这里

http://stackoverflow.com/questions/4396634/how-can-i-determine-if-a-given-drive-letter-is-a-local-mapped-usb-drive

https://www.codeproject.com/kb/system/drivedetector.aspx

Detecting USB Drive Removal in a C# Program

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Answer 2

http://stackoverflow.com/questions/27965098/c-sharp-how-do-i-check-usb-ports-with-usb-hub-and-used-controller

http://stackoverflow.com/questions/4396634/how-can-i-determine-if-a-given-drive-letter-is-a-local-mapped-usb-drive

System.IO.DriveInfo[] drives = System.IO.DriveInfo.GetDrives();
foreach (var drive in drives)
{
    string driveName = drive.Name; // C:\, E:\, etc:\

    System.IO.DriveType driveType = drive.DriveType;
    switch (driveType)
    {
        case System.IO.DriveType.CDRom:
            break;
        case System.IO.DriveType.Fixed:
            // Local Drive
            break;
        case System.IO.DriveType.Network:
            // Mapped Drive
            break;
        case System.IO.DriveType.NoRootDirectory:
            break;
        case System.IO.DriveType.Ram:
            break;
        case System.IO.DriveType.Removable:
            // Usually a USB Drive
            break;
        case System.IO.DriveType.Unknown:
            break;
    }
}

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专注于.NET ERP/CRM开发框架，C/S架构，SQL Server + ORM(LLBL Gen Pro) + Infragistics WinForms