C#: Come utilizzare SHOpenFolderAndSelectItems

Question

Qualcuno potrebbe dare un esempio su come utilizzare la funzione di shell SHOpenFolderAndSelectItems da C#? Non riesce quasi mai a utilizzare questo tipo di funzioni e non sono riuscito a trovare su pinvoke.net ... =/

dire che ho tre file chiamato

• X:\Pictures\a.jpg
• X:\Pictures\s.jpg
• X:\Pictures\d.jpg

poi voglio aprire la cartella X:\Pictures con a.jpg, s.jpg e d.jpg selezionati.

Answer 1

La maggior parte delle esigenze sarebbero di SHOpoenFolderSelectedItems sarà gestita dal:

Per la selezione dei file in C# si usa normalmente: System.Windows.Forms.OpenFileDialog.

Per la selezione della cartella in C# si utilizza normalmente: System.Windows.Forms.FolderBrowserDialog.

Si imposta un filtro appropriato ed è possibile impostare inizialmente una voce selezionata.

Forse questo è abbastanza vicino a quello che ti serve?

Answer 2

Verificare http://www.cnblogs.com/qiuyi21/archive/2009/06/24/1510592.html. L'esempio utilizza IShellLink per ottenere i pidl dal percorso prima di avviare SHOpenFolderAndSelectItems, vorrei invece utilizzare ILCreateFromPath.

Answer 3

Come ti sembra di avere chiesto due volte la stessa domanda (l'altro è C#: How to open Windows Explorer windows with a number of files selected che non ha avuto risposta) ho posto la mia soluzione a entrambe le domande non so se devo fare uno un wiki comunità.

Ricerca di una risposta dopo un collega aveva il problema che ho trovato nessuno così ho scritto una piccola classe per fare questo. Il codice is on Gist e incollerò la versione corrente alla fine di questo post.

Con i tuoi file di esempio, la sintassi sarà:

ShowSelectedInExplorer.FilesOrFolders(
    @"X:\Pictures\a.jpg", 
    @"X:\Pictures\s.jpg", 
    @"X:\Pictures\d.jpg" 
); 

Ci sono alcune limitazioni per il mio codice rispetto alle API di basso livello, principalmente:

• Selezione sul desktop non è implementata
• La directory padre deve essere una directory o un'unità, pertanto non è possibile selezionare più unità nella cartella Risorse del computer, ad esempio.

Ad ogni modo, ecco il codice sorgente della classe ShowSelectedInExplorer:

using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Linq; 
using System.Runtime.CompilerServices; 
using System.Runtime.InteropServices; 
using System.Runtime.InteropServices.ComTypes; 

static class ShowSelectedInExplorer 
{ 
    [Flags] 
    internal enum SHCONT : ushort 
    { 
     SHCONTF_CHECKING_FOR_CHILDREN = 0x0010, 
     SHCONTF_FOLDERS = 0x0020, 
     SHCONTF_NONFOLDERS = 0x0040, 
     SHCONTF_INCLUDEHIDDEN = 0x0080, 
     SHCONTF_INIT_ON_FIRST_NEXT = 0x0100, 
     SHCONTF_NETPRINTERSRCH = 0x0200, 
     SHCONTF_SHAREABLE = 0x0400, 
     SHCONTF_STORAGE = 0x0800, 
     SHCONTF_NAVIGATION_ENUM = 0x1000, 
     SHCONTF_FASTITEMS = 0x2000, 
     SHCONTF_FLATLIST = 0x4000, 
     SHCONTF_ENABLE_ASYNC = 0x8000 
    } 

    [ComImport, 
    Guid("000214E6-0000-0000-C000-000000000046"), 
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown), 
    ComConversionLoss] 
    internal interface IShellFolder 
    { 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void ParseDisplayName(IntPtr hwnd, [In, MarshalAs(UnmanagedType.Interface)] IBindCtx pbc, [In, MarshalAs(UnmanagedType.LPWStr)] string pszDisplayName, [Out] out uint pchEaten, [Out] out IntPtr ppidl, [In, Out] ref uint pdwAttributes); 
     [PreserveSig] 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     int EnumObjects([In] IntPtr hwnd, [In] SHCONT grfFlags, [MarshalAs(UnmanagedType.Interface)] out IEnumIDList ppenumIDList); 

     [PreserveSig] 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     int BindToObject([In] IntPtr pidl, [In, MarshalAs(UnmanagedType.Interface)] IBindCtx pbc, [In] ref Guid riid, [Out, MarshalAs(UnmanagedType.Interface)] out IShellFolder ppv); 

     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void BindToStorage([In] ref IntPtr pidl, [In, MarshalAs(UnmanagedType.Interface)] IBindCtx pbc, [In] ref Guid riid, out IntPtr ppv); 

     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void CompareIDs([In] IntPtr lParam, [In] ref IntPtr pidl1, [In] ref IntPtr pidl2); 

     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void CreateViewObject([In] IntPtr hwndOwner, [In] ref Guid riid, out IntPtr ppv); 

     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void GetAttributesOf([In] uint cidl, [In] IntPtr apidl, [In, Out] ref uint rgfInOut); 


     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void GetUIObjectOf([In] IntPtr hwndOwner, [In] uint cidl, [In] IntPtr apidl, [In] ref Guid riid, [In, Out] ref uint rgfReserved, out IntPtr ppv); 

     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void GetDisplayNameOf([In] ref IntPtr pidl, [In] uint uFlags, out IntPtr pName); 

     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     void SetNameOf([In] IntPtr hwnd, [In] ref IntPtr pidl, [In, MarshalAs(UnmanagedType.LPWStr)] string pszName, [In] uint uFlags, [Out] IntPtr ppidlOut); 
    } 

    [ComImport, 
    Guid("000214F2-0000-0000-C000-000000000046"), 
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] 
    internal interface IEnumIDList 
    { 
     [PreserveSig] 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     int Next(uint celt, IntPtr rgelt, out uint pceltFetched); 

     [PreserveSig] 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     int Skip([In] uint celt); 

     [PreserveSig] 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     int Reset(); 

     [PreserveSig] 
     [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)] 
     int Clone([MarshalAs(UnmanagedType.Interface)] out IEnumIDList ppenum); 
    } 

    class NativeMethods 
    { 
     static readonly int pointerSize = Marshal.SizeOf(typeof(IntPtr)); 

     [DllImport("ole32.dll", EntryPoint = "CreateBindCtx")] 
     public static extern int CreateBindCtx_(int reserved, out IBindCtx ppbc); 

     public static IBindCtx CreateBindCtx() 
     { 
      IBindCtx result; 
      Marshal.ThrowExceptionForHR(CreateBindCtx_(0, out result)); 
      return result; 
     } 

     [DllImport("shell32.dll", EntryPoint = "SHGetDesktopFolder", CharSet = CharSet.Unicode, SetLastError = true)] 
     static extern int SHGetDesktopFolder_([MarshalAs(UnmanagedType.Interface)] out IShellFolder ppshf); 

     public static IShellFolder SHGetDesktopFolder() 
     { 
      IShellFolder result; 
      Marshal.ThrowExceptionForHR(SHGetDesktopFolder_(out result)); 
      return result; 
     } 

     [DllImport("shell32.dll", EntryPoint = "SHOpenFolderAndSelectItems")] 
     static extern int SHOpenFolderAndSelectItems_(
      [In] IntPtr pidlFolder, uint cidl, [In, Optional, MarshalAs(UnmanagedType.LPArray)] IntPtr[] apidl, int dwFlags 
      ); 

     public static void SHOpenFolderAndSelectItems(IntPtr pidlFolder, IntPtr[] apidl, int dwFlags) 
     { 
      var cidl = (apidl != null) ? (uint)apidl.Length : 0U; 
      var result = NativeMethods.SHOpenFolderAndSelectItems_(pidlFolder, cidl, apidl, dwFlags); 
      Marshal.ThrowExceptionForHR(result); 
     } 

     [DllImport("shell32.dll", CharSet = CharSet.Unicode)] 
     public static extern IntPtr ILCreateFromPath([In, MarshalAs(UnmanagedType.LPWStr)] string pszPath); 

     [DllImport("shell32.dll")] 
     public static extern void ILFree([In] IntPtr pidl); 
    } 

    static IntPtr GetShellFolderChildrenRelativePIDL(IShellFolder parentFolder, string displayName) 
    { 
     var bindCtx = NativeMethods.CreateBindCtx(); 

     uint pchEaten; 
     uint pdwAttributes = 0; 
     IntPtr ppidl; 
     parentFolder.ParseDisplayName(IntPtr.Zero, null, displayName, out pchEaten, out ppidl, ref pdwAttributes); 

     return ppidl; 
    } 

    static IntPtr PathToAbsolutePIDL(string path) 
    { 
     var desktopFolder = NativeMethods.SHGetDesktopFolder(); 
     return GetShellFolderChildrenRelativePIDL(desktopFolder, path); 
    } 

    static Guid IID_IShellFolder = typeof(IShellFolder).GUID; 
    static int pointerSize = Marshal.SizeOf(typeof(IntPtr)); 

    static IShellFolder PIDLToShellFolder(IShellFolder parent, IntPtr pidl) 
    { 
     IShellFolder folder; 
     var result = parent.BindToObject(pidl, null, ref IID_IShellFolder, out folder); 
     Marshal.ThrowExceptionForHR((int)result); 
     return folder; 
    } 

    static IShellFolder PIDLToShellFolder(IntPtr pidl) 
    { 
     return PIDLToShellFolder(NativeMethods.SHGetDesktopFolder(), pidl); 
    } 

    static void SHOpenFolderAndSelectItems(IntPtr pidlFolder, IntPtr[] apidl, bool edit) 
    { 
     NativeMethods.SHOpenFolderAndSelectItems(pidlFolder, apidl, edit ? 1 : 0); 
    } 

    public static void FileOrFolder(string path, bool edit = false) 
    { 
     if (path == null) throw new ArgumentNullException("path"); 

     var pidl = PathToAbsolutePIDL(path); 
     try 
     { 
      SHOpenFolderAndSelectItems(pidl, null, edit); 
     } 
     finally 
     { 
      NativeMethods.ILFree(pidl); 
     } 
    } 

    static IEnumerable<FileSystemInfo> PathToFileSystemInfo(IEnumerable<string> paths) 
    { 
     foreach (var path in paths) 
     { 
      string fixedPath = path; 
      if (fixedPath.EndsWith(Path.DirectorySeparatorChar.ToString()) || fixedPath.EndsWith(Path.AltDirectorySeparatorChar.ToString())) 
      { 
       fixedPath = fixedPath.Remove(fixedPath.Length - 1); 
      } 

      if (Directory.Exists(fixedPath)) yield return new DirectoryInfo(fixedPath); 
      else if (File.Exists(fixedPath)) yield return new FileInfo(fixedPath); 
      else 
      { 
       throw new FileNotFoundException("The specified file or folder doesn't exists : " + fixedPath, fixedPath); 
      } 
     } 
    } 

    public static void FilesOrFolders(string parentDirectory, ICollection<string> filenames) 
    { 
     if (filenames == null) throw new ArgumentNullException("filenames"); 
     if (filenames.Count == 0) return; 

     var parentPidl = PathToAbsolutePIDL(parentDirectory); 
     try 
     { 
      var parent = PIDLToShellFolder(parentPidl); 

      List<IntPtr> filesPidl = new List<IntPtr>(filenames.Count); 
      foreach (var filename in filenames) 
      { 
       filesPidl.Add(GetShellFolderChildrenRelativePIDL(parent, filename)); 
      } 

      try 
      { 
       SHOpenFolderAndSelectItems(parentPidl, filesPidl.ToArray(), false); 
      } 
      finally 
      { 
       foreach (var pidl in filesPidl) 
       { 
        NativeMethods.ILFree(pidl); 
       } 
      } 
     } 
     finally 
     { 
      NativeMethods.ILFree(parentPidl); 
     } 
    } 

    public static void FilesOrFolders(params string[] paths) 
    { 
     FilesOrFolders((IEnumerable<string>)paths); 
    } 

    public static void FilesOrFolders(IEnumerable<string> paths) 
    { 
     FilesOrFolders(PathToFileSystemInfo(paths)); 
    } 

    public static void FilesOrFolders(IEnumerable<FileSystemInfo> paths) 
    { 
     if (paths == null) throw new ArgumentNullException("paths"); 
     if (paths.Count() == 0) return; 

     var explorerWindows = paths.GroupBy(p => Path.GetDirectoryName(p.FullName)); 

     foreach (var explorerWindowPaths in explorerWindows) 
     { 
      var parentDirectory = Path.GetDirectoryName(explorerWindowPaths.First().FullName); 
      FilesOrFolders(parentDirectory, explorerWindowPaths.Select(fsi => fsi.Name).ToList()); 
     } 
    } 
} 

Answer 4

Non è una risposta al 100%, ma questo frammento di codice mostra come selezionare un singolo elemento in Esplora da C#.

private void SelectInFileExplorer(string fullPath) 
    { 
     if (string.IsNullOrEmpty(fullPath)) 
      throw new ArgumentNullException("fullPath"); 

     fullPath = Path.GetFullPath(fullPath); 

     IntPtr pidlList = NativeMethods.ILCreateFromPathW(fullPath); 
     if (pidlList != IntPtr.Zero) 
      try 
      { 
       // Open parent folder and select item 
       Marshal.ThrowExceptionForHR(NativeMethods.SHOpenFolderAndSelectItems(pidlList, 0, IntPtr.Zero, 0)); 
      } 
      finally 
      { 
       NativeMethods.ILFree(pidlList); 
      } 
    } 

    static class NativeMethods 
    { 

     [DllImport("shell32.dll", ExactSpelling=true)] 
     public static extern void ILFree(IntPtr pidlList); 

     [DllImport("shell32.dll", CharSet=CharSet.Unicode, ExactSpelling=true)] 
     public static extern IntPtr ILCreateFromPathW(string pszPath); 

     [DllImport("shell32.dll", ExactSpelling=true)] 
     public static extern int SHOpenFolderAndSelectItems(IntPtr pidlList, uint cild, IntPtr children, uint dwFlags); 
    }