C# 获取可用磁盘空间

Get free disk space

提问by bh213

Given each of the inputs below, I'd like to get free space on that location. Something like

鉴于以下每个输入，我想在该位置获得可用空间。就像是

long GetFreeSpace(string path)

Inputs:

输入：

c:

c:\

c:\temp

\server

\server\C\storage

回答by RichardOD

DriveInfowill help you with some of those (but it doesn't work with UNC paths), but really I think you will need to use GetDiskFreeSpaceEx. You can probably achieve some functionality with WMI. GetDiskFreeSpaceEx looks like your best bet.

DriveInfo将帮助您解决其中的一些问题（但它不适用于 UNC 路径），但我真的认为您需要使用GetDiskFreeSpaceEx。您可能可以使用 WMI 实现某些功能。GetDiskFreeSpaceEx 看起来是您最好的选择。

Chances are you will probably have to clean up your paths to get it to work properly.

您可能需要清理路径以使其正常工作。

回答by RvdK

untested:

未经测试：

using System;
using System.Management;

ManagementObject disk = new
ManagementObject("win32_logicaldisk.deviceid="c:"");
disk.Get();
Console.WriteLine("Logical Disk Size = " + disk["Size"] + " bytes");
Console.WriteLine("Logical Disk FreeSpace = " + disk["FreeSpace"] + "
bytes"); 

Btw what is the outcome of free diskspace on c:\temp ? you will get the space free of c:\

顺便说一句， c:\temp 上可用磁盘空间的结果是什么？您将获得免费的空间 c:\

回答by erez dan

this works for me...

这对我有用...

using System.IO;

private long GetTotalFreeSpace(string driveName)
{
    foreach (DriveInfo drive in DriveInfo.GetDrives())
    {
        if (drive.IsReady && drive.Name == driveName)
        {
            return drive.TotalFreeSpace;
        }
    }
    return -1;
}

good luck!

祝你好运！

回答by NightlyHakr

I was looking for the size in GB, so I just improved the code from Superman above with the following changes:

我正在寻找以 GB 为单位的大小，所以我只是通过以下更改改进了上面超人的代码：

public double GetTotalHDDSize(string driveName)
{
    foreach (DriveInfo drive in DriveInfo.GetDrives())
    {
        if (drive.IsReady && drive.Name == driveName)
        {
            return drive.TotalSize / (1024 * 1024 * 1024);
        }
    }
    return -1;
}

回答by sasha_gud

Working code snippet using GetDiskFreeSpaceExfrom link by RichardOD.

使用GetDiskFreeSpaceEx来自 RichardOD 链接的工作代码片段。

// Pinvoke for API function
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,
out ulong lpFreeBytesAvailable,
out ulong lpTotalNumberOfBytes,
out ulong lpTotalNumberOfFreeBytes);

public static bool DriveFreeBytes(string folderName, out ulong freespace)
{
    freespace = 0;
    if (string.IsNullOrEmpty(folderName))
    {
        throw new ArgumentNullException("folderName");
    }

    if (!folderName.EndsWith("\"))
    {
        folderName += '\';
    }

    ulong free = 0, dummy1 = 0, dummy2 = 0;

    if (GetDiskFreeSpaceEx(folderName, out free, out dummy1, out dummy2))
    {
        freespace = free;
        return true;
    }
    else
    {
        return false;
    }
}

回答by Siva

see this article!

看这篇文章！

1. identify UNC par or local drive path by searching index of ":"

2. if its is UNC PATH you cam map UNC path

3. code to execute drive name is mapped drive name < UNC Mapped Drive or Local Drive>.

   using System.IO;
   
   private long GetTotalFreeSpace(string driveName)
   {
   foreach (DriveInfo drive in DriveInfo.GetDrives())
   {
       if (drive.IsReady && drive.Name == driveName)
       {
           return drive.TotalFreeSpace;
       }
   }
   return -1;
   }
   

4. unmap after you requirement done.

1. 通过搜索“:”的索引来识别 UNC par 或本地驱动器路径

2. 如果它是 UNC 路径，则您可以映射 UNC 路径

3. 执行驱动器名称的代码是映射驱动器名称<UNC 映射驱动器或本地驱动器>。

   using System.IO;
   
   private long GetTotalFreeSpace(string driveName)
   {
   foreach (DriveInfo drive in DriveInfo.GetDrives())
   {
       if (drive.IsReady && drive.Name == driveName)
       {
           return drive.TotalFreeSpace;
       }
   }
   return -1;
   }
   

4. 完成要求后取消映射。

回答by varun

I wanted a similar method for my project but in my case the input paths were either from local disk volumes or clustered storage volumes (CSVs). So DriveInfo class did not work for me. CSVs have a mount point under another drive, typically C:\ClusterStorage\Volume*. Note that C: will be a different Volume than C:\ClusterStorage\Volume1

我想为我的项目使用类似的方法，但在我的情况下，输入路径来自本地磁盘卷或集群存储卷 (CSV)。所以 DriveInfo 类对我不起作用。CSV 在另一个驱动器下有一个安装点，通常是 C:\ClusterStorage\Volume*。请注意， C: 将是与 C:\ClusterStorage\Volume1 不同的卷

This is what I finally came up with:

这就是我最终想出的：

    public static ulong GetFreeSpaceOfPathInBytes(string path)
    {
        if ((new Uri(path)).IsUnc)
        {
            throw new NotImplementedException("Cannot find free space for UNC path " + path);
        }

        ulong freeSpace = 0;
        int prevVolumeNameLength = 0;

        foreach (ManagementObject volume in
                new ManagementObjectSearcher("Select * from Win32_Volume").Get())
        {
            if (UInt32.Parse(volume["DriveType"].ToString()) > 1 &&                             // Is Volume monuted on host
                volume["Name"] != null &&                                                       // Volume has a root directory
                path.StartsWith(volume["Name"].ToString(), StringComparison.OrdinalIgnoreCase)  // Required Path is under Volume's root directory 
                )
            {
                // If multiple volumes have their root directory matching the required path,
                // one with most nested (longest) Volume Name is given preference.
                // Case: CSV volumes monuted under other drive volumes.

                int currVolumeNameLength = volume["Name"].ToString().Length;

                if ((prevVolumeNameLength == 0 || currVolumeNameLength > prevVolumeNameLength) &&
                    volume["FreeSpace"] != null
                    )
                {
                    freeSpace = ulong.Parse(volume["FreeSpace"].ToString());
                    prevVolumeNameLength = volume["Name"].ToString().Length;
                }
            }
        }

        if (prevVolumeNameLength > 0)
        {
            return freeSpace;
        }

        throw new Exception("Could not find Volume Information for path " + path);
    }

回答by Alex Jolig

As this answerand @RichardOD suggested , you should do like this:

正如这个答案和@RichardOD 建议的那样，你应该这样做：

[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);

回答by Waruna Manjula

using System;
using System.IO;

class Test
{
    public static void Main()
    {
        DriveInfo[] allDrives = DriveInfo.GetDrives();

        foreach (DriveInfo d in allDrives)
        {
            Console.WriteLine("Drive {0}", d.Name);
            Console.WriteLine("  Drive type: {0}", d.DriveType);
            if (d.IsReady == true)
            {
                Console.WriteLine("  Volume label: {0}", d.VolumeLabel);
                Console.WriteLine("  File system: {0}", d.DriveFormat);
                Console.WriteLine(
                    "  Available space to current user:{0, 15} bytes", 
                    d.AvailableFreeSpace);

                Console.WriteLine(
                    "  Total available space:          {0, 15} bytes",
                    d.TotalFreeSpace);

                Console.WriteLine(
                    "  Total size of drive:            {0, 15} bytes ",
                    d.TotalSize);
            }
        }
    }
}
/* 
This code produces output similar to the following:

Drive A:\
  Drive type: Removable
Drive C:\
  Drive type: Fixed
  Volume label: 
  File system: FAT32
  Available space to current user:     4770430976 bytes
  Total available space:               4770430976 bytes
  Total size of drive:                10731683840 bytes 
Drive D:\
  Drive type: Fixed
  Volume label: 
  File system: NTFS
  Available space to current user:    15114977280 bytes
  Total available space:              15114977280 bytes
  Total size of drive:                25958948864 bytes 
Drive E:\
  Drive type: CDRom

The actual output of this code will vary based on machine and the permissions
granted to the user executing it.
*/

回答by john doe

I had the same problem and i saw waruna manjula giving the best answer. However writing it all down on the console is not what you might want. To get string off al info use the following

我遇到了同样的问题，我看到 waruna manjula 给出了最好的答案。但是，将其全部写在控制台上并不是您想要的。要从 al 信息中获取字符串，请使用以下命令

Step one: declare values at begin

第一步：在开始时声明值

    //drive 1
    public static string drivename = "";
    public static string drivetype = "";
    public static string drivevolumelabel = "";
    public static string drivefilesystem = "";
    public static string driveuseravailablespace = "";
    public static string driveavailablespace = "";
    public static string drivetotalspace = "";

    //drive 2
    public static string drivename2 = "";
    public static string drivetype2 = "";
    public static string drivevolumelabel2 = "";
    public static string drivefilesystem2 = "";
    public static string driveuseravailablespace2 = "";
    public static string driveavailablespace2 = "";
    public static string drivetotalspace2 = "";

    //drive 3
    public static string drivename3 = "";
    public static string drivetype3 = "";
    public static string drivevolumelabel3 = "";
    public static string drivefilesystem3 = "";
    public static string driveuseravailablespace3 = "";
    public static string driveavailablespace3 = "";
    public static string drivetotalspace3 = "";

Step 2: actual code

第 2 步：实际代码

                DriveInfo[] allDrives = DriveInfo.GetDrives();
                int drive = 1;
                foreach (DriveInfo d in allDrives)
                {
                    if (drive == 1)
                    {
                        drivename = String.Format("Drive {0}", d.Name);
                        drivetype = String.Format("Drive type: {0}", d.DriveType);
                        if (d.IsReady == true)
                        {
                            drivevolumelabel = String.Format("Volume label: {0}", d.VolumeLabel);
                            drivefilesystem = String.Format("File system: {0}", d.DriveFormat);
                            driveuseravailablespace = String.Format("Available space to current user:{0, 15} bytes", d.AvailableFreeSpace);
                            driveavailablespace = String.Format("Total available space:{0, 15} bytes", d.TotalFreeSpace);
                            drivetotalspace = String.Format("Total size of drive:{0, 15} bytes ", d.TotalSize);
                        }
                        drive = 2;
                    }
                    else if (drive == 2)
                    {
                        drivename2 = String.Format("Drive {0}", d.Name);
                        drivetype2 = String.Format("Drive type: {0}", d.DriveType);
                        if (d.IsReady == true)
                        {
                            drivevolumelabel2 = String.Format("Volume label: {0}", d.VolumeLabel);
                            drivefilesystem2 = String.Format("File system: {0}", d.DriveFormat);
                            driveuseravailablespace2 = String.Format("Available space to current user:{0, 15} bytes", d.AvailableFreeSpace);
                            driveavailablespace2 = String.Format("Total available space:{0, 15} bytes", d.TotalFreeSpace);
                            drivetotalspace2 = String.Format("Total size of drive:{0, 15} bytes ", d.TotalSize);
                        }
                        drive = 3;
                    }
                    else if (drive == 3)
                    {
                        drivename3 = String.Format("Drive {0}", d.Name);
                        drivetype3 = String.Format("Drive type: {0}", d.DriveType);
                        if (d.IsReady == true)
                        {
                            drivevolumelabel3 = String.Format("Volume label: {0}", d.VolumeLabel);
                            drivefilesystem3 = String.Format("File system: {0}", d.DriveFormat);
                            driveuseravailablespace3 = String.Format("Available space to current user:{0, 15} bytes", d.AvailableFreeSpace);
                            driveavailablespace3 = String.Format("Total available space:{0, 15} bytes", d.TotalFreeSpace);
                            drivetotalspace3 = String.Format("Total size of drive:{0, 15} bytes ", d.TotalSize);
                        }
                        drive = 4;
                    }
                    if (drive == 4)
                    {
                        drive = 1;
                    }
                }

                //part 2: possible debug - displays in output

                //drive 1
                Console.WriteLine(drivename);
                Console.WriteLine(drivetype);
                Console.WriteLine(drivevolumelabel);
                Console.WriteLine(drivefilesystem);
                Console.WriteLine(driveuseravailablespace);
                Console.WriteLine(driveavailablespace);
                Console.WriteLine(drivetotalspace);

                //drive 2
                Console.WriteLine(drivename2);
                Console.WriteLine(drivetype2);
                Console.WriteLine(drivevolumelabel2);
                Console.WriteLine(drivefilesystem2);
                Console.WriteLine(driveuseravailablespace2);
                Console.WriteLine(driveavailablespace2);
                Console.WriteLine(drivetotalspace2);

                //drive 3
                Console.WriteLine(drivename3);
                Console.WriteLine(drivetype3);
                Console.WriteLine(drivevolumelabel3);
                Console.WriteLine(drivefilesystem3);
                Console.WriteLine(driveuseravailablespace3);
                Console.WriteLine(driveavailablespace3);
                Console.WriteLine(drivetotalspace3);

I want to note that you can just make all the console writelines comment code, but i thought it would be nice for you to test it. If you display all these after each other you get the same list as waruna majuna

我想指出，您可以将所有控制台写行注释代码，但我认为您最好对其进行测试。如果您依次显示所有这些，您将获得与 waruna majuna 相同的列表

Drive C:\ Drive type: Fixed Volume label: File system: NTFS Available space to current user: 134880153600 bytes Total available space: 134880153600 bytes Total size of drive: 499554185216 bytes

驱动器 C:\ 驱动器类型：固定卷标：文件系统：NTFS 当前用户可用空间：134880153600 字节总可用空间：134880153600 字节驱动器总大小：499554185216 字节

Drive D:\ Drive type: CDRom

驱动器 D:\ 驱动器类型：CDROM

Drive H:\ Drive type: Fixed Volume label: HDD File system: NTFS Available space to current user: 2000010817536 bytes Total available space: 2000010817536 bytes Total size of drive: 2000263573504 bytes

驱动器 H:\ 驱动器类型：固定卷标：HDD 文件系统：NTFS 当前用户可用空间：2000010817536 字节总可用空间：2000010817536 字节驱动器总大小：2000263573504 字节

However you can now acces all of the loose information at strings

但是，您现在可以访问字符串中的所有松散信息