public Image Ole2Image(int width, int height)
{
Bitmap result = null;
IRichEditOle richEditInterface = this.GetRichEditOleInterface();
if (richEditInterface.GetObjectCount() == 0)
{
return(result);
}
REOBJECT reObject = new REOBJECT();
// S_OK == 0, so 0 == success.
if (0 == richEditInterface.GetObject(0, reObject, GetObjectOptions.REO_GETOBJ_POLEOBJ))
{
try
{
IntPtr pViewObject = IntPtr.Zero;
Guid guid = new Guid("{0000010d-0000-0000-C000-000000000046}");
Marshal.QueryInterface(reObject.poleobj, ref guid, out pViewObject);
IViewObject viewobject = (IViewObject)Marshal.GetTypedObjectForIUnknown(pViewObject, typeof(IViewObject));
int imgwidth = width;
int imgheight = System.Convert.ToInt32(reObject.sizel.y * 1.0 / reObject.sizel.x * imgwidth);
result = new Bitmap(imgwidth, imgheight);
Rectangle imgRectangle = new Rectangle(0, 0, imgwidth, imgheight);
using (Graphics g = Graphics.FromImage(result))
{
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
IntPtr hdc = g.GetHdc();
viewobject.Draw(1, -1, IntPtr.Zero, IntPtr.Zero,
IntPtr.Zero, hdc, ref imgRectangle,
ref imgRectangle, IntPtr.Zero, 0);
g.ReleaseHdc(hdc);
g.DrawRectangle(Pens.White, imgRectangle);
}
//Release the pViewObject
Marshal.Release(pViewObject);
}
finally
{
Marshal.Release(reObject.poleobj);
}
}
return(result);
}
public Size GetObjectSize(Size defaultSize)
{
Size size = defaultSize;
IRichEditOle richEditInterface = this.GetRichEditOleInterface();
if (richEditInterface.GetObjectCount() == 0)
{
return(size);
}
REOBJECT reObject = new REOBJECT();
// S_OK == 0, so 0 == success.
if (0 == richEditInterface.GetObject(0, reObject, GetObjectOptions.REO_GETOBJ_POLEOBJ))
{
try
{
IntPtr pViewObject = IntPtr.Zero;
Guid guid = new Guid("{0000010d-0000-0000-C000-000000000046}");
Marshal.QueryInterface(reObject.poleobj, ref guid, out pViewObject);
IViewObject viewobject = (IViewObject)Marshal.GetTypedObjectForIUnknown(pViewObject, typeof(IViewObject));
size = new Size(reObject.sizel.x, reObject.sizel.y);
//Release the pViewObject
Marshal.Release(pViewObject);
}
finally
{
Marshal.Release(reObject.poleobj);
}
}
return(size);
}