如何在c#中获取可移动磁盘列表？

Question

我想在c#中获取可移动磁盘列表.我想跳过本地驱动器.因为我希望用户只将文件保存在可移动磁盘中.

Answer 1

您需要参考System.IO此方法.

var driveList = DriveInfo.GetDrives();

foreach (DriveInfo drive in driveList)
{
    if (drive .DriveType == DriveType.Removable)
    {
    //Add to RemovableDrive list or whatever activity you want
    }    
}

或者对于LINQ粉丝:

var driveList = DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.Removable);

添加
至于保存部分,据我所知,我不认为您可以限制用户可以保存到使用SaveFileDialog的位置,但您可以在显示SaveFileDialog后完成检查.

if(saveFileDialog.ShowDialog() == DialogResult.OK)
{
  if (CheckFilePathIsOfRemovableDisk(saveFileDialog.FileName) == true)
  {
  //carry on with save
  }
  else
  {
  MessageBox.Show("Must save to Removable Disk, location was not valid");
  }
}

要么

最好的选择是创建自己的保存对话框,其中包含树视图,仅显示可移动驱动器及其内容供用户保存!我会推荐这个选项.

希望这可以帮助

Answer 2

怎么样:

var removableDrives = from d in System.IO.DriveInfo.GetDrives()
                      where d.DriveType == DriveType.Removable;

Answer 3

您还可以使用 WMI 获取可移动驱动器列表。

ManagementObjectCollection drives = new ManagementObjectSearcher (
     "SELECT Caption, DeviceID FROM Win32_DiskDrive WHERE InterfaceType='USB'"
).Get();

根据评论编辑：

获得驱动器列表后，获取 GUID 并将它们添加到 SaveFileDialogInstance.CustomPlaces 集合。

下面的代码需要一些调整...

System.Windows.Forms.SaveFileDialog dls = new System.Windows.Forms.SaveFileDialog();
dls.CustomPlaces.Clear();
dls.CustomPlaces.Add(AddGuidOfTheExternalDriveOneByOne);
....
....
dls.ShowDialog();