Using Drag and Drop from DicomViewer COM object, to another application, in .NET enviroment.

In order to enable drag and drop from a DicomViewer COM object, in .NET enviroment, Follow the following steps:

In the definition part of the dicom viewer (in the form "InitializeComponent" section), add the following line:

this.axDicomViewer1.MouseDownEvent += new AxDicomObjects.IDicomViewerEvents_MouseDownEventHandler(this.axDicomViewer1_MouseDown);

Then implement axDicomViewer1_MouseDown:

private void axDicomViewer1_MouseDown(object sender, IDicomViewerEvents_MouseDownEvent e)
{
   if (((e.button& 1) != 0)) //left button clicked
   {
      Array arr = (Array)image.WriteArray(true,null,"100");  //convert the image to an array
      byte [] ba = new byte[arr.LongLength];
      arr.CopyTo(ba,0);
      axDicomViewer1.DoDragDrop(ba, DragDropEffects.Copy);   //send the array as the drag/drop object
   }
}

Then, in the target application, in your drop target control, do:

this.TARGET_CONTROL.DragDrop += new System.Windows.Forms.DragEventHandler(dragdrop);

And implement the dragdrop method.

private void dragdrop(Object sender, DragEventArgs e)
{
   try
   {
       DicomImage di;
       IDataObject io = ((IDataObject)(e.Data));
       DicomImages images = new DicomImages();
       byte [] ba = (byte[]) io.GetData("System.Byte[]");
       di = (DicomImage) images.ReadArray(ba);
       if (di!=null)
       {
         //your DicomImage is now imported. you can now use it.
       }
   }
   catch
   {
      //Handle expeptions here, usually when you drag something irrelevant to this code to your control.
   }
}

Drag and Drop in .NET version of DicomObjects is lot simpler:

        private void Viewer1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                DicomImage img = Viewer1.Images[0];             
                Viewer1.DoDragDrop(img, System.Windows.Forms.DragDropEffects.Copy);
            }
        }

        private void Viewer2_DragDrop(object sender, DragEventArgs e)
        {
            System.Windows.Forms.IDataObject io = ((System.Windows.Forms.IDataObject)(e.Data));
            Viewer2.Images.Add(io.GetData(typeof(DicomImage)) as DicomImage);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Viewer1.Images.Read("DICOMImage_1");
        }

        private void Viewer2_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetFormats().Contains("DicomObjects.DicomImage"))
                e.Effect = DragDropEffects.Copy;
        }