Hi Michael,

Thanks for posting about such interesting scenario. Intersoft's drag and drop framework has a very solid architecture which enables better customizability and greater control over the drag and drop process.

In your case, you can continue using OnDragDrop event of WebTreeView since it gives you processed data such as ItemObject. If your struggle is only about the Effect, then here's the good news. You can customize the Effect to your liking by handling OnDragQuery event of WebTreeView.

Here's a snippet code:

function Tree_OnDragQuery(id, dragContext, subObjectContext)
{
     var node = subObjectContext.ItemObject;
     // change effect to "copy"
     if (node.Text == "WebUI Studio")
          dragContext.Effect = ISDragDropEffects.Copy;
}

In addition to "Effect", I think you can also customize the effect tooltip that is shown during drag, eg, dragContext.EffectText = "Copy item to WebUI Studio";

Hope this helps,
James.

Hi James

Thanks for your answer!

I have tested your code, but it doesn't works.   The OnDragQuery Event isn't fired.

It's not enough to change effect, because I can also add Clildnodes only!

Regards

Michael

Hi Michael,

Have you attached the function to the OnDragQuery client side event in TreeView? Eg, <ClientSideEvents OnDragQuery="Tree_OnDragQuery" />.

The events are fired properly. You can also check a basic sample that demonstrate all drag drop events in installed live sample. Open WebTreeView (C# Samples), then look for DragDropEvents.aspx sample.

Let me know how it goes in your end.

It's not enough to change effect, because I can also add Clildnodes only!

 I'm not sure if I got you on this one. WebTreeView should let you drop on just any nodes (parent and child). Let me know if you have other scenarios.

I have tested DragDropEvents.aspx sample. But in my case, I drag from WebGrid and drop on WebTree. Maybe it doesn't work, because I use the WebPaneManager.

In other thread (Bind 2 WebGrids to Dataset -> second post from me), I have described my scenario. Please have a look.

Okay, in this case, try to hook the drag query handler to WebDragDropExtender's OnDragQuery instead. I think it'll be fired, although I'm not sure if you can get the "node" in WDDE's event level. However, if you don't need the details in the function handler and simply want to change the Effect, I think that can be done.