Bitmap to Clipboard problem - DOTNET

If you place a CF_DIB clipboard format to the cliboard with
your code, the clipboard will synthesize the following formats:
CF_BITMAP, CF_DIB5, CF_PALETTE

It will not synthesize a CF_METAFILEPICT format from your DIB.

You must create a Metafile object and place either a CF_ENHMETAFILE
or a CF_METAFILEPICT object on the clipboard.

The clipboard will synthesize either a CF_ENHMETAFILE or a CF_METAFILEPICT
format depending upon which one of these you placed on the clipboard.


"geo24" <flyfish@poczta.onet.pl> wrote in message
news:1131954306.167849.150010@f14g2000cwb.googlegroups.com...
> Have a problem with clipboard. Using the standard way for copying the
> image data:
>
> read the image into "myBitmap"
> copy the image into clipboard:
>
> DataObject myData = new DataObject();
> myData.SetData( DataFormats.Dib,true,myBitmap);
> Clipboard.SetDataObject(myData,true);
>
> Now: pasting the image from the clipboard works with most programs
> (e.g. MS Paint, Outlook). But it doesn't work with OpenOffice There
> is no "Paste" function active...
>
> The there is only one entry in clipboard formats after above operation:
>
>
> MetaFilePict - DeviceIndependentBitmap
>
> There is no problem with OpenOffice when image is copied from MS Paint.
>
> So checked the clipboard formats after copying the image into clipboard
>
> in MS Paint. There are two formats:
>
> MetaFilePict - DeviceIndependentBitmap
> Embed Source - Object Descriptor
>
> Does the second entry causes the problem? How to resolve that problem?
>

Could you show how to do that in c# having just a jpg file?

Geo24

--
Sent via .NET Newsgroups
http://www.dotnetnewsgroups.com

There is a bug in the .Net implementation of SetData for the metafile
clipboard format.

Use the following instead:
// declarations
[DllImport("user32.dll")]
static extern IntPtr SetClipboardData(uint uFormat, IntPtr hMem);

[DllImport("user32.dll")]
static extern bool OpenClipboard(IntPtr hWndNewOwner);

[DllImport("user32.dll")]
static extern bool EmptyClipboard();

[DllImport("user32.dll")]
static extern bool CloseClipboard();

public static uint CF_ENHMETAFILE = 14;

....

Bitmap img = (Bitmap)Bitmap.FromFile(@"c:\TestImage.jpg",true);
// create graphics object for metafile
Graphics g = CreateGraphics();
IntPtr hdc = g.GetHdc();
Metafile meta = new Metafile(@"SampleMetafilegdiplus.emf", hdc );
g.ReleaseHdc(hdc);
g.Dispose();
// create a metafile image from the jpeg image
g = Graphics.FromImage(meta);
g.DrawImage(img, new Point(0,0));
g.Dispose();
// get a handle to the metafile
IntPtr hEmf = meta.GetHenhmetafile();
meta.Dispose();
// open the clipboard
OpenClipboard(this.Handle); // your Form's Window handle
EmptyClipboard();
// place the handle to the metafile on to the clipboard
SetClipboardData(CF_ENHMETAFILE, hEmf);
CloseClipboard();

....


"Geo24" <flyfish@poczta.onet.pl> wrote in message
news:uw2%233R96FHA.3416@TK2MSFTNGP15.phx.gbl...
> Could you show how to do that in c# having just a jpg file?
>
> Geo24
>
> --
> Sent via .NET Newsgroups
> http://www.dotnetnewsgroups.com

It works OK. Thank you Michael!