| re: How do I extract my data from a Drag & Drop ComObject?
Hi Neil,
I am having the exact same problem and was disappointed to see that
nobody replied... Did you find a solution that you could share?
John
"Neil West" <NeilWest@discussions.microsoft.com> wrote in message
news:15CF92A7-21FB-4831-9A34-266BBD5DD9D8@microsoft.com...[color=blue]
> I'm trying to drag & drop listview items between two instances of my app.
> The
> actual data that's passed in DoDragDrop is an arraylist that's been
> serialized to a memorystream. The contents of the arraylist are objects
> of a
> simple, serializable custom class that allows the recipient listview to
> reconstruct the dragged listitems. (the contents of the arraylist
> actually
> don't matter.they can be simple integers and the issues in this post
> remain
> the same)
>
> When I'm dragging & dropping within an instance of my app, e.Data from the
> DragDrop event is a DataObject and I can extract my memorystream,
> deserialize
> it, and I'm good. However, when I drag & drop to another instance of my
> application, e.Data is a System.__ComObject. Attempting to extract my
> data
> with the normal e.Data.GetData method results in a memorystream that's,
> according to the Locals window, a
> System.Runtime.Remoting.Proxies.__TransparentProxy , which is beyond the
> scope
> of my VB knowledge. Regardless, it doesn't deserialize, and now I'm
> stuck.
>
> So could someone kindly explain what I need to do to the __ComObject to
> get
> my memorystream out? Here's my code:
>
> If e.Data.GetDataPresent("System.IO.MemoryStream") Then
> Dim Formatter As New BinaryFormatter
> Dim Stream As New System.IO.MemoryStream
> Dim DropList As New ArrayList
>
> Stream = e.Data.GetData("System.IO.MemoryStream")
> Stream.Position = 0
> DropList = Formatter.Deserialize(Stream)
>
>
> Any help would be appreciated.
>
> Neil
>[/color]
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