獲取可用磁盤的可用空間對於給定的路徑在Windows

Question

可能重複：
Programmatically determining space available from UNC Path

我試圖找到，我可以從C＃調用來檢索信息的功能。 這是我到目前爲止已經試過：

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); 

這工作不錯，但只有當我通過一個驅動器號。是否有通過傳遞整個路徑來獲取空閒空間的方法？

謝謝。

Answer 1

嘗試使用WINAPI功能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);