using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Security.AccessControl;
using System.Security.Principal;
class VhdxBackupManager
{
const string VhdxPath = @"D:\Backup.vhdx";
const string AdminAccount = "Administrators";
static char _currentDriveLetter = 'E'; // 默認(rèn)起始盤符
public static void ExecuteSafeBackup()
{
try
{
// 0. 確保VHDX文件存在
if (!File.Exists(VhdxPath))
{
CreateNewVhdx();
SetVhdxPermissions();
}
// 1. 尋找可用盤符
char driveLetter = FindAvailableDriveLetter();
// 2. 掛載可讀寫VHDX
MountVhdx(driveLetter, readOnly: false);
// 3. 執(zhí)行備份操作
File.Copy("C:\\Data\\important.txt", $"{driveLetter}:\\important.txt", true);
// 4. 卸載并重新掛載為只讀
DismountVhdx(driveLetter);
MountVhdx(driveLetter, readOnly: true);
}
catch (Exception ex)
{
DismountVhdx(_currentDriveLetter); // 嘗試卸載當(dāng)前盤符
Console.WriteLine($"Error: {ex.Message}");
}
}
// 動(dòng)態(tài)查找可用盤符（從E到Z）
private static char FindAvailableDriveLetter()
{
var usedDrives = DriveInfo.GetDrives()
.Select(d => d.Name[0])
.ToList();
for (char c = 'E'; c <= 'Z'; c++)
{
if (!usedDrives.Contains(c))
{
_currentDriveLetter = c;
return c;
}
}
throw new InvalidOperationException("沒有可用的驅(qū)動(dòng)器盤符");
}
// 掛載虛擬磁盤方法
private static void MountVhdx(char driveLetter, bool readOnly)
{
var script = $@"
select vdisk file={VhdxPath}
attach vdisk {(readOnly ? "readonly" : "")}
assign letter={driveLetter}
exit
";
ExecuteDiskPart(script);
// 驗(yàn)證掛載是否成功
if (!Directory.Exists($"{driveLetter}:\\"))
{
throw new Exception($"掛載到 {driveLetter}: 失敗");
}
}
// 卸載虛擬磁盤方法
private static void DismountVhdx(char driveLetter)
{
var script = $@"
select vdisk file={VhdxPath}
detach vdisk
exit
";
ExecuteDiskPart(script);
}
// 原有權(quán)限設(shè)置方法保持不變
private static void SetVhdxPermissions()
{
var fileInfo = new FileInfo(VhdxPath);
FileSecurity fSecurity = fileInfo.GetAccessControl();
// 禁用繼承并清除所有現(xiàn)有權(quán)限
fSecurity.SetAccessRuleProtection(true, false);
AuthorizationRuleCollection rules = fSecurity.GetAccessRules(true, true, typeof(NTAccount));
foreach (FileSystemAccessRule rule in rules)
{
fSecurity.RemoveAccessRule(rule);
}
// 添加SYSTEM完全控制（掛載操作需要）
fSecurity.AddAccessRule(new FileSystemAccessRule(
new SecurityIdentifier(WellKnownSidType.LocalSystemSid, null),
FileSystemRights.FullControl,
AccessControlType.Allow));
// 添加管理員組只讀權(quán)限
fSecurity.AddAccessRule(new FileSystemAccessRule(
new NTAccount(AdminAccount),
FileSystemRights.Read | FileSystemRights.ExecuteFile,
InheritanceFlags.None,
PropagationFlags.None,
AccessControlType.Allow));
// 禁止Everyone寫入
fSecurity.AddAccessRule(new FileSystemAccessRule(
new SecurityIdentifier(WellKnownSidType.WorldSid, null),
FileSystemRights.Write,
AccessControlType.Deny));
fileInfo.SetAccessControl(fSecurity);
}
private static void CreateNewVhdx()
{
var script = $@"
create vdisk file={VhdxPath} maximum=10240 type=expandable
select vdisk file={VhdxPath}
attach vdisk
create partition primary
format quick fs=ntfs label=BackupDrive
detach vdisk
exit
";
ExecuteDiskPart(script);
}
private static void ExecuteDiskPart(string script)
{
var tempFile = Path.GetTempFileName();
File.WriteAllText(tempFile, script);
using (var process = new Process())
{
process.StartInfo = new ProcessStartInfo
{
FileName = "diskpart",
Arguments = $"/s {tempFile}",
UseShellExecute = false,
CreateNoWindow = true
};
process.Start();
process.WaitForExit(15000);
if (process.ExitCode != 0)
{
File.Delete(tempFile);
throw new Exception("diskpart執(zhí)行失敗，返回碼：" + process.ExitCode);
}
}
File.Delete(tempFile);
}
}
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【C#】如何判斷虛擬磁盤VHDX文件是否已經(jīng)被掛載，掛載到了哪一個(gè)盤符，并且當(dāng)前是掛載為只讀模式還是可讀寫模式[
1]