C# 在 Windows 上获取给定路径的可用磁盘可用空间
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Get available disk free space for a given path on Windows
提问by LEM
Possible Duplicate:
Programmatically determining space available from UNC Path
可能的重复：以
编程方式确定 UNC 路径中的可用空间
I'm trying to find a function that I can call from C# to retrieve that information. This is what I have tried so far:
我试图找到一个可以从 C# 调用以检索该信息的函数。这是我迄今为止尝试过的：
String folder = "z:\myfolder"; // It works
folder = "\mycomputer\myfolder"; // It doesn't work
System.IO.DriveInfo drive = new System.IO.DriveInfo(folder);
System.IO.DriveInfo a = new System.IO.DriveInfo(drive.Name);
long HDPercentageUsed = 100 - (100 * a.AvailableFreeSpace / a.TotalSize);
This works ok, but only if I pass a drive letter. Is there a way of retrieving the free space by passing a whole path?
这工作正常，但前提是我传递了一个驱动器号。有没有办法通过整个路径来检索可用空间？
Thanks.
谢谢。
采纳答案by rekire
Try to use the winapi function GetDiskFreeSpaceEx:
尝试使用 winapi 函数GetDiskFreeSpaceEx：
[DllImport("kernel32.dll", SetLastError=true, CharSet=CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,
out ulong lpFreeBytesAvailable,
out ulong lpTotalNumberOfBytes,
out ulong lpTotalNumberOfFreeBytes);
ulong FreeBytesAvailable;
ulong TotalNumberOfBytes;
ulong TotalNumberOfFreeBytes;
bool success = GetDiskFreeSpaceEx(@"\mycomputer\myfolder",
out FreeBytesAvailable,
out TotalNumberOfBytes,
out TotalNumberOfFreeBytes);
if(!success)
throw new System.ComponentModel.Win32Exception();
Console.WriteLine("Free Bytes Available: {0,15:D}", FreeBytesAvailable);
Console.WriteLine("Total Number Of Bytes: {0,15:D}", TotalNumberOfBytes);
Console.WriteLine("Total Number Of FreeBytes: {0,15:D}", TotalNumberOfFreeBytes);
