how to get the name of the application that generated the drag and drop

Question

how do i find out which application dropped some content on my c# form? right now i'm doing some wild guesses, like

if (e.Data.GetDataPresent("UniformResourceLocatorW", true)) {
  // URL dropped from IExplorer
}

but what i'm really looking for is something like

if (isDroppedFrom("iexplorer")) {
  // URL dropped from IExplorer
}

any hints appreciated.

Answer 1

As far as I know, there's no direct information in the drag drop structure that indicates the originating application.

http://msdn.microsoft.com/en-us/library/bb776902(VS.85).aspx

If you're only interested in finding out if it's a drop from IE, the presence of CFSTR_UNTRUSTEDDRAGDROP is a clue; AFAIK, only IE and Web Browser Controls will put this format on the clipboard.

Answer 2

ok, this is what i ended up doing, for those interested..

            // FIREFOX //
            if (e.Data.GetDataPresent("text/x-moz-url", true)) {
                HandleFirefoxUrl(e);
            } else if (e.Data.GetDataPresent("text/_moz_htmlcontext", true)) {
                HandleFirefoxSnippet(e);

                // IE //
            } else if (e.Data.GetDataPresent("UntrustedDragDrop", false)) {
                HandleIELink(e);
            } else if (e.Data.GetDataPresent("UniformResourceLocatorW", false)) {
                HandleIEPage(e);

            } else if (e.Data.GetDataPresent(DataFormats.FileDrop, true)) { //FILES
                Array droppedFiles = (Array)e.Data.GetData(DataFormats.FileDrop);
                HandleFiles(droppedFiles);

            } else if (e.Data.GetDataPresent(DataFormats.Bitmap, true)) { // BITMAP
                Bitmap image = (Bitmap)Clipboard.GetDataObject().GetData(DataFormats.Bitmap);
                HandleBitmap(image);

            } else if (e.Data.GetDataPresent(DataFormats.Html, true)) { // HTML
                String pastedHtml = (string)e.Data.GetData(DataFormats.Html);
                HandleHtml(pastedHtml);

            } else if (e.Data.GetDataPresent(DataFormats.CommaSeparatedValue, true)) { // CSV
                MemoryStream memstr = (MemoryStream)e.Data.GetData("Csv");
                StreamReader streamreader = new StreamReader(memstr);
                String pastedCSV = streamreader.ReadToEnd();
                HandleCSV(pastedCSV);

                //  } else if (e.Data.GetDataPresent(DataFormats.Tiff, true)) {
                //  } else if (e.Data.GetDataPresent(DataFormats.WaveAudio, true)) {

            } else if (e.Data.GetDataPresent(DataFormats.Text, true)) { //TEXT
                String droppedText = e.Data.GetData(DataFormats.Text).ToString();
                HandleText(droppedText);

            [else if .....]

            } else { // UNKNOWN
                Debug.WriteLine("unknown dropped format");
            }