/// <summary>Requests an object that can be used to obtain information from or interact with a folder object.</summary>
/// <typeparam name="TInterface">The interface to retrieve, typically IShellView.</typeparam>
/// <param name="parentWindow">The owner window.</param>
/// <returns>The interface pointer requested.</returns>
public TInterface GetViewObject <TInterface>(System.Windows.Forms.IWin32Window parentWindow) where TInterface : class
{
try
{
return(iShellFolder.CreateViewObject(IWin2Ptr(parentWindow), typeof(TInterface).GUID) as TInterface);
}
catch (InvalidCastException e)
{
throw new NotImplementedException(null, e);
}
}
//==========================================================
//renvoie une instance de l'interface d'extraction d'icône pour item
//==========================================================
//IN item : instance de IShellFolder depuis laquelle on extrait l'extracteur d'icône
//IN pidl : pointeur vers un ITEMLIST contenant le nom de fichier dont on veut l'icône
//renvoie une instance de IExtractIcon
//==========================================================
private IExtractIcon getIcon(IShellFolder item, IntPtr pidl)
{
int prgf = 0;
Guid uuidIExtractIcon = new Guid("000214FA-0000-0000-C000-000000000046");
try {
if (pidl != IntPtr.Zero)
{
return((IExtractIcon)item.GetUIObjectOf(IntPtr.Zero, 1, ref pidl, ref uuidIExtractIcon, out prgf));
}
else
{
return((IExtractIcon)item.CreateViewObject(IntPtr.Zero, ref uuidIExtractIcon));
}
} catch { return(null); }
}
//==========================================================
//renvoie une instance de l'interface d'extraction de miniature pour item
//==========================================================
//IN item : instance de IShellFolder depuis laquelle on extrait l'extracteur de miniature
//IN pidl : pointeur vers un ITEMLIST contenant le nom de fichier dont on veut la miniature
//renvoie une instance de IExtractImage
//==========================================================
private IExtractImage getThumbnail(IShellFolder item, IntPtr pidl)
{
int prgf = 0;
Guid uuidIExtractImage = new Guid("BB2E617C-0920-11D1-9A0B-00C04FC2D6C1");
try {
// If we have a file's pidl
if (pidl != IntPtr.Zero)
{
// Extract the file's thumbnail
return((IExtractImage)item.GetUIObjectOf(IntPtr.Zero, 1, ref pidl, ref uuidIExtractImage, out prgf));
}
else
{
// Or use the parent folder
return((IExtractImage)item.CreateViewObject(IntPtr.Zero, ref uuidIExtractImage));
}
} catch { return(null); }
}
public static int CreateViewObject(IShellFolder folder, IntPtr Handle, ref Guid shellViewGuid, out IntPtr iShellViewPtr)
{
int hr = WinError.S_FALSE;
try
{
hr = folder.CreateViewObject(Handle,
ref shellViewGuid, out iShellViewPtr);
}
catch (System.AccessViolationException)
{
// A first chance exception of type 'System.AccessViolationException' occurred
iShellViewPtr = IntPtr.Zero;
}
catch (Exception)
{
iShellViewPtr = IntPtr.Zero;
}
return(hr); // WinError
}
private IUnknown GetUIObject(IShellFolder shellFolder, string filename, Guid uuid)
{
IUnknown iunk = null;
if (System.IO.File.Exists(filename))
{
IntPtr pidl = IntPtr.Zero;
int cParsed = 0;
int pdwAttrib = 0;
shellFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, System.IO.Path.GetFileName(filename), out cParsed, out pidl, out pdwAttrib);
if (pidl != IntPtr.Zero)
{
int prgf = 0;
shellFolder.GetUIObjectOf(IntPtr.Zero, 1, ref pidl, ref uuid, out prgf, ref iunk);
}
}
else
{
shellFolder.CreateViewObject(IntPtr.Zero, ref uuid, ref iunk);
}
return(iunk);
}
/// <summary>Requests an object that can be used to obtain information from or interact with a folder object.</summary> /// <typeparam name="TInterface">The interface to retrieve, typically IShellView.</typeparam> /// <param name="parentWindow">The owner window.</param> /// <returns>The interface pointer requested.</returns> public TInterface GetViewObject <TInterface>(HWND parentWindow) where TInterface : class => iShellFolder.CreateViewObject <TInterface>(parentWindow);
public int CreateViewObject(IntPtr hwndOwner, Guid riid, out IntPtr ppv)
{
checkDisposed();
return(_iShellFolder.CreateViewObject(hwndOwner, riid, out ppv));
}
/// <summary>Requests an object that can be used to obtain information from or interact with a folder object.</summary> /// <typeparam name="TInterface">The interface to retrieve, typically IShellView.</typeparam> /// <param name="parentWindow">The owner window.</param> /// <returns>The interface pointer requested.</returns> public TInterface GetViewObject <TInterface>(System.Windows.Forms.IWin32Window parentWindow) where TInterface : class => iShellFolder.CreateViewObject <TInterface>(IWin2Ptr(parentWindow));
public static T CreateViewObject <T>(this IShellFolder psf, IntPtr hwndOwner) where T : class
{
return((T)psf.CreateViewObject(hwndOwner, typeof(T).GUID));
}
