private bool GetThumbnail(string file, IntPtr pidl, IShellFolder item, int width, int height)
{
IntPtr hBmp = IntPtr.Zero;
IExtractImage extractImage = null;
try
{
string pidlPath = PathFromPidl(pidl);
if (Path.GetFileName(pidlPath).ToUpper().Equals(Path.GetFileName(file).ToUpper()))
{
IUnknown iunk = null;
int prgf = 0;
Guid iidExtractImage = new Guid("BB2E617C-0920-11d1-9A0B-00C04FC2D6C1");
item.GetUIObjectOf(IntPtr.Zero, 1, ref pidl, ref iidExtractImage, out prgf, ref iunk);
extractImage = (IExtractImage)iunk;
if (extractImage != null)
{
SIZE sz = new SIZE();
sz.cx = width;
sz.cy = height;
StringBuilder location = new StringBuilder(260, 260);
int priority = 0;
int requestedColourDepth = 32;
EIEIFLAG flags = EIEIFLAG.IEIFLAG_ASPECT | EIEIFLAG.IEIFLAG_SCREEN;
int uFlags = (int)flags;
extractImage.GetLocation(location, location.Capacity, ref priority, ref sz, requestedColourDepth, ref uFlags);
extractImage.Extract(out hBmp);
if (hBmp != IntPtr.Zero)
{
thumbNail = System.Drawing.Bitmap.FromHbitmap(hBmp);
}
Marshal.ReleaseComObject(extractImage);
extractImage = null;
}
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
if (hBmp != IntPtr.Zero)
{
UnmanagedMethods.DeleteObject(hBmp);
}
if (extractImage != null)
{
Marshal.ReleaseComObject(extractImage);
}
throw ex;
}
}
private bool _getThumbNail(string file, IntPtr pidl, IShellFolder item)
{
IntPtr hBmp = IntPtr.Zero;
IExtractImage extractImage = null;
IntPtr[] pidl_array = new IntPtr[] { pidl };
try
{
string pidlPath = PathFromPidl(pidl);
if (Path.GetFileName(pidlPath).ToUpper().Equals(Path.GetFileName(file).ToUpper()))
{
object iunk = null;
Guid iidExtractImage = new Guid("BB2E617C-0920-11d1-9A0B-00C04FC2D6C1");
item.GetUIObjectOf(IntPtr.Zero, 1, pidl_array, ref iidExtractImage, IntPtr.Zero, out iunk);
extractImage = (IExtractImage)iunk;
if (extractImage != null)
{
Console.WriteLine("Got an IExtractImage object!");
SIZE sz = new SIZE();
sz.cx = DesiredSize.Width;
sz.cy = DesiredSize.Height;
StringBuilder location = new StringBuilder(260, 260);
int priority = 0;
int requestedColourDepth = 32;
EIEIFLAG flags = EIEIFLAG.IEIFLAG_ASPECT | EIEIFLAG.IEIFLAG_SCREEN;
int uFlags = (int)flags;
extractImage.GetLocation(location, location.Capacity, ref priority, ref sz, requestedColourDepth, ref uFlags);
extractImage.Extract(ref hBmp);
if (hBmp != IntPtr.Zero)
{
_thumbNail = Bitmap.FromHbitmap(hBmp);
}
Marshal.ReleaseComObject(extractImage);
extractImage = null;
}
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
if (hBmp != IntPtr.Zero)
{
UnmanagedMethods.DeleteObject(hBmp);
}
if (extractImage != null)
{
Marshal.ReleaseComObject(extractImage);
}
throw ex;
}
}
private bool GetThumbnailHelper(string file, IntPtr pidl, IShellFolder item)
{
IntPtr bitmapPointer = IntPtr.Zero;
IExtractImage extractImage = null;
try
{
string pidlPath = this.PathFromPidl(pidl);
if (Path.GetFileName(pidlPath).ToUpper().Equals(Path.GetFileName(file).ToUpper()))
{
IUnknown iunk = null;
int prgf = 0;
Guid iidExtractImage = new Guid("BB2E617C-0920-11d1-9A0B-00C04FC2D6C1");
item.GetUIObjectOf(IntPtr.Zero, 1, ref pidl, ref iidExtractImage, ref prgf, ref iunk);
extractImage = (IExtractImage)iunk;
if (extractImage != null)
{
Console.WriteLine("Got an IExtractImage object - " + file);
SIZE sz = new SIZE();
sz.HorizontalSize = this.DesiredSize.Width;
sz.VerticalSize = this.DesiredSize.Height;
StringBuilder location = new StringBuilder(260, 260);
int priority = 0;
int requestedColourDepth = 32;
EIEIFLAG flags = EIEIFLAG.IEIFLAG_ASPECT | EIEIFLAG.IEIFLAG_SCREEN;
int nameFlags = (int)flags;
extractImage.GetLocation(location, location.Capacity, ref priority, ref sz, requestedColourDepth, ref nameFlags);
extractImage.Extract(ref bitmapPointer);
if (bitmapPointer != IntPtr.Zero)
{
this.thumbNail = Bitmap.FromHbitmap(bitmapPointer);
}
Marshal.ReleaseComObject(extractImage);
extractImage = null;
}
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
if (bitmapPointer != IntPtr.Zero)
{
UnmanagedMethods.DeleteObject(bitmapPointer);
}
if (extractImage != null)
{
Marshal.ReleaseComObject(extractImage);
}
throw ex;
}
}
private bool getThumbNail(string file, IntPtr pidl, IShellFolder item)
{
IntPtr hBmp = IntPtr.Zero;
IExtractImage extractImage = null;
try
{
var pidlPath = pathFromPidl(pidl);
if (!Path.GetFileName(pidlPath).ToUpper().Equals(Path.GetFileName(file).ToUpper()))
{
return(false);
}
IUnknown iunk = null;
var prgf = 0;
var iidExtractImage = new Guid("BB2E617C-0920-11d1-9A0B-00C04FC2D6C1");
item.GetUIObjectOf(IntPtr.Zero, 1, ref pidl, ref iidExtractImage, ref prgf, ref iunk);
extractImage = (IExtractImage)iunk;
if (extractImage == null)
{
return(true);
}
var sz = new Size {
cx = DesiredSize.Width, cy = DesiredSize.Height
};
var location = new StringBuilder(260, 260);
var priority = 0;
const int requestedColourDepth = 32;
const EIEIFLAG flags =
EIEIFLAG.IeiflagScreen | EIEIFLAG.IeiflagAsync | EIEIFLAG.IeiflagQuality | EIEIFLAG.IeiflagCache;
var uFlags = (int)flags;
try
{
extractImage.GetLocation(
location, location.Capacity, ref priority, ref sz, requestedColourDepth, ref uFlags);
}
catch { }
extractImage.Extract(ref hBmp);
if (hBmp != IntPtr.Zero)
{
ThumbNail = Image.FromHbitmap(hBmp);
}
Marshal.ReleaseComObject(extractImage);
extractImage = null;
return(true);
}
finally
{
if (hBmp != IntPtr.Zero)
{
UnmanagedMethods.DeleteObject(hBmp);
}
if (extractImage != null)
{
Marshal.ReleaseComObject(extractImage);
}
}
}