Get the drive letter from a path string or FileInfo

问题

This may seem like a stupid question, so here goes:

Other than parsing the string of FileInfo.FullPath for the drive letter to then use DriveInfo("c") etc to see if there is enough space to write this file. Is there a way to get the drive letter from FileInfo?

回答1:

FileInfo f = new FileInfo(path);    
string drive = Path.GetPathRoot(f.FullName);

This will return "C:\". That's really the only other way.

回答2:

Well, there's also this:

FileInfo file = new FileInfo(path);
DriveInfo drive = new DriveInfo(file.Directory.Root.FullName);

And hey, why not an extension method?

public static DriveInfo GetDriveInfo(this FileInfo file)
{
    return new DriveInfo(file.Directory.Root.FullName);
}

Then you could just do:

DriveInfo drive = new FileInfo(path).GetDriveInfo();

回答3:

Nothing wrong with a little string parsing :-)

FullPath.Substring(0,1);

回答4:

You can get all drive in system using this code :

foreach (DriveInfo objDrive in DriveInfo.GetDrives())
    {
        Response.Write("</br>Drive Type : " + objDrive.Name);
        Response.Write("</br>Drive Type : " + objDrive.DriveType.ToString());
        Response.Write("</br>Available Free Space : " + objDrive.AvailableFreeSpace.ToString() + "(bytes)");
        Response.Write("</br>Drive Format : " + objDrive.DriveFormat);
        Response.Write("</br>Total Free Space : " + objDrive.TotalFreeSpace.ToString() + "(bytes)");
        Response.Write("</br>Total Size : " + objDrive.TotalSize.ToString() + "(bytes)");
        Response.Write("</br>Volume Label : " + objDrive.VolumeLabel);
        Response.Write("</br></br>");

    }

来源：https://stackoverflow.com/questions/370267/get-the-drive-letter-from-a-path-string-or-fileinfo

标签

file-io