我需要能够检查本地 OneDrive 文件夹是否同步/最新。
我能否在不使用任何 One Drive API 的情况下通过查看任何文件/文件夹属性（在 C# 代码中）来检查这一点？
【问题讨论】：
标签： c# synchronization onedrive
我被困住了，所以想检查主文件夹图标。
已编辑
重点是提取同步的文件夹图标并获取覆盖CLSID。
你首先需要一个类来提取你需要的信息：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
using Microsoft.Win32;
namespace MyApp.Classes
{
public class ExtractIconInfo
{
[Flags]
private enum SHGFI : uint
{
SHGFI_ICON = 0x000000100,
SHGFI_DISPLAYNAME = 0x000000200,
SHGFI_TYPENAME = 0x000000400,
SHGFI_ATTRIBUTES = 0x000000800,
SHGFI_ICONLOCATION = 0x000001000,
SHGFI_EXETYPE = 0x000002000,
SHGFI_SYSICONINDEX = 0x000004000,
SHGFI_LINKOVERLAY = 0x000008000,
SHGFI_SELECTED = 0x000010000,
SHGFI_ATTR_SPECIFIED = 0x000020000,
SHGFI_LARGEICON = 0x000000000,
SHGFI_SMALLICON = 0x000000001,
SHGFI_OPENICON = 0x000000002,
SHGFI_SHELLICONSIZE = 0x000000004,
SHGFI_PIDL = 0x000000008,
SHGFI_USEFILEATTRIBUTES = 0x000000010,
SHGFI_ADDOVERLAYS = 0x000000020,
SHGFI_OVERLAYINDEX = 0x000000040
}
[Flags]
private enum FileAttributes : uint
{
Readonly = 0x00000001,
Hidden = 0x00000002,
System = 0x00000004,
Directory = 0x00000010,
Archive = 0x00000020,
Device = 0x00000040,
Normal = 0x00000080,
Temporary = 0x00000100,
SparseFile = 0x00000200,
ReparsePoint = 0x00000400,
Compressed = 0x00000800,
Offline = 0x00001000,
NotContentIndexed = 0x00002000,
Encrypted = 0x00004000,
Virtual = 0x00010000
}
[Flags]
public enum ISIOI : uint
{
ISIOI_ICONFILE = 0x00000001,
ISIOI_ICONINDEX = 0x00000002
}
private SortedDictionary<string, Guid> ShellIconOverlayIdentifiers;
public string IconName { get; private set; }
public Icon Icon { get; private set; }
public int IconOverlayIndex { get; private set; }
public Guid IconOverlayGuid { get; private set; }
public ExtractIconInfo(FileInfo fi)
{
ExtractIcon(fi.FullName, false);
}
public ExtractIconInfo(DirectoryInfo di)
{
ExtractIcon(di.FullName, true);
}
public ExtractIconInfo(string path, bool isFolder)
{
ExtractIcon(path, isFolder);
}
[ComVisible(false)]
[ComImport]
[Guid("0C6C4200-C589-11D0-999A-00C04FD655E1")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IShellIconOverlayIdentifier
{
[PreserveSig]
int IsMemberOf([MarshalAs(UnmanagedType.LPWStr)] string path, uint attributes);
[PreserveSig]
int GetOverlayInfo([MarshalAs(UnmanagedType.LPWStr)] string iconFileBuffer, int iconFileBufferSize, out int iconIndex, out uint flags);
[PreserveSig]
int GetPriority(out int priority);
}
[StructLayout(LayoutKind.Sequential)]
private struct SHFILEINFO
{
internal IntPtr hIcon;
internal int iIcon;
internal uint dwAttributes;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
internal string szDisplayName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
internal string szTypeName;
};
[DllImport("shell32.dll")]
private static extern IntPtr SHGetFileInfo(
string pszPath,
uint dwFileAttributes,
ref SHFILEINFO psfi,
uint cbSizeFileInfo,
uint uFlags
);
[DllImport("shell32.dll")]
private static extern int SHGetIconOverlayIndex(
string pszIconPath,
int iIconIndex
);
[DllImport("user32.dll")]
public static extern int DestroyIcon(IntPtr hIcon);
private void ExtractIcon(string path, bool isFolder)
{
SHFILEINFO shIconInfo = new SHFILEINFO();
SHGetFileInfo(path, isFolder ? (uint)FileAttributes.Directory : (uint)FileAttributes.Normal, ref shIconInfo, (uint)Marshal.SizeOf(shIconInfo), (uint)SHGFI.SHGFI_ICON | (uint)SHGFI.SHGFI_LARGEICON | (uint)SHGFI.SHGFI_DISPLAYNAME | (uint)SHGFI.SHGFI_ADDOVERLAYS | (uint)SHGFI.SHGFI_OVERLAYINDEX);
Icon = (Icon)Icon.FromHandle(shIconInfo.hIcon).Clone();
IconName = shIconInfo.szDisplayName;
IconOverlayIndex = (shIconInfo.iIcon >> 24) & 0xFF;
GetOverlayIconGuid();
DestroyIcon(shIconInfo.hIcon);
}
private void GetOverlayIconGuid()
{
IconOverlayGuid = Guid.Empty;
GetRegistryShellIconOverlayIdentifiers();
foreach (string key in ShellIconOverlayIdentifiers.Keys)
{
string AIconFileName = string.Empty;
int AIconIndex = 0;
Guid value = ShellIconOverlayIdentifiers[key];
GetOverlayIconInfo(value, out AIconFileName, out AIconIndex);
if (SHGetIconOverlayIndex(AIconFileName, AIconIndex) == IconOverlayIndex)
IconOverlayGuid = value;
}
}
private void GetOverlayIconInfo(Guid CLSID, out string path, out int index)
{
try
{
path = new string(' ', 256);
uint flags = 0;
IShellIconOverlayIdentifier SHIOI = Activator.CreateInstance(Type.GetTypeFromCLSID(CLSID, true), true) as IShellIconOverlayIdentifier;
SHIOI.GetOverlayInfo(path, path.Length, out index, out flags);
Marshal.ReleaseComObject(SHIOI);
if ((flags & (uint)ISIOI.ISIOI_ICONFILE) != 0)
{
if ((flags & (uint)ISIOI.ISIOI_ICONINDEX) == 0) index = 0;
}
else
{
path = string.Empty;
index = 0;
}
path = path.Substring(0, path.IndexOf('\0'));
}
catch
{
path = string.Empty;
index = 0;
}
}
private void GetRegistryShellIconOverlayIdentifiers()
{
ShellIconOverlayIdentifiers = new SortedDictionary<string, Guid>();
using (RegistryKey key32 = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, Environment.MachineName, RegistryView.Registry32).OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers"))
foreach (string subKey in key32.GetSubKeyNames())
{
Guid value = Guid.Parse((string)key32.OpenSubKey(subKey).GetValue(null));
if (!ShellIconOverlayIdentifiers.ContainsKey(subKey))
ShellIconOverlayIdentifiers.Add(subKey, value);
}
using (RegistryKey key64 = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, Environment.MachineName, RegistryView.Registry64).OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers"))
foreach (string subKey in key64.GetSubKeyNames())
{
Guid value = Guid.Parse((string)key64.OpenSubKey(subKey).GetValue(null));
if (!ShellIconOverlayIdentifiers.ContainsKey(subKey))
ShellIconOverlayIdentifiers.Add(subKey, value);
}
}
}
}
这里的相关信息是IconOverlayGuid。
然后比较：
public enum SyncStatus { Off, Unknown, Syncing, Synced, SharedSyncing, SharedSynced, Error }
private SyncStatus CheckIfSync(DirectoryInfo di)
{
ExtractIconInfo IcoInfo = new ExtractIconInfo(di);
if (IcoInfo != null)
{
if (IcoInfo.IconOverlayGuid == Guid.Empty) return SyncStatus.Off;
else if (IcoInfo.IconOverlayGuid == new Guid("{BBACC218-34EA-4666-9D7A-C78F2274A524}")) return SyncStatus.Error;
else if (IcoInfo.IconOverlayGuid == new Guid("{F241C880-6982-4CE5-8CF7-7085BA96DA5A}")) return SyncStatus.Synced;
else if (IcoInfo.IconOverlayGuid == new Guid("{A0396A93-DC06-4AEF-BEE9-95FFCCAEF20E}")) return SyncStatus.Syncing;
else if (IcoInfo.IconOverlayGuid == new Guid("{5AB7172C-9C11-405C-8DD5-AF20F3606282}")) return SyncStatus.SharedSynced;
else if (IcoInfo.IconOverlayGuid == new Guid("{A78ED123-AB77-406B-9962-2A5D9D2F7F30}")) return SyncStatus.SharedSyncing;
else return SyncStatus.Unknown;
}
else return SyncStatus.Unknown;
}
覆盖图标存储在FileSyncShell.dll。
它们的 CLSID 存储在注册表中：HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers 和 HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers。
希望有帮助！
（我花了太多时间在那个上面，但我学到了很多东西！）
【讨论】：
可能比较 LastModifiedDateTime。
...Drive.Root.ItemWithPath(file).Request().GetAsync()).FileSystemInfo.LastModifiedDateTime
【讨论】：