Bug with Drag and Drop

[Andrew]

Hi,

right after your Q2 2011 release I installed the new version and was migrating my software.
I have massive use of drag and drop with grids and treeviews.
But I see one ore more bugs relating to the drag and drop.
The most obviously problem is, that after dragging items within in a grid and drop them there -
which is not the goal but happens when you play around - items are vanishing!
I drag an item and drop it. Then I make some double clicks on other items. Those items
are vanishing!
You can test it with your Online-Demos too. They are not working properly anymore!
It takes me just a few seconds (with a combination of drag and drop and double click inside a grid) to  let all items
disappear.

I moved back to the prior version but I would appreciate a bugfix as soon as possible to get started with the new bits!

By the way: It is not possible for me to deinstall the new Telerik Q2 2011 Silverlight Controls. It deinstalls but leaves
the software on the machine. It stays in the "Programs" folder and you can try to deinstall again and again.

Best Regards
Andrew

[Tsvyatko]

Hello Andrew,

 Thank you for your feedback. Since Q2 2011 we have refactored the Drag and Drop internal functionality and introduced DragDropManager with API similar to .net build-in API that also raise the RadDragAndDropManager events.  We have also added option to revert to the original RadDragAndDropManager mechanism using RadDragAndDropManager.ExecutionMode = DragExecutionMode.Legacy (needs to be set before intitalizeComponent - best in App constructor).  

Regarding the issue - we have tried to reproduce it from our side, however with no success. Would it be possible to share some additional information about example in which this problem occurs, as well as the steps needed to get the issue.

Regards,
Tsvyatko
the Telerik team

[Andrew]

Hello Tsvyatko,

thank you for your reply.
I realized, that you you changed something with Drag and Drop, despite I have missed some more
information or guidance on how to change the drag and drop code.

Regarding the issue:
Ok.

1. Go to your Online-Demo!
2. All Controls -> DragAndDrop -> choose the "Drag over Tab"
3. Move the first 3 items ("Large Collider", "Paintbrush", "Lively Calendar") from "All Applications" Tab to "My Applications" Tab
4. Goto "My Applications" Tab
5. Click on "Large Collider" (all clicks with the left mouse button)
6. Click on "Paintbrush" with double click
7. Double Click on "Large Collider"  and it disappears
8. Double Click on "Lively Calendar" and it disappears

You can repeat it and just do fast clicking between the items and get them all disappear.
If it doesn't work the first time exactly the way I pointed it out, then just click around (fast!).

I can reproduce it as often as I want with all items I want - and with your Live Demo!!!
So there is no code to provide!

Regards
Andrew

[Andrew]

Hi,

I did some more tests on different computers and other browsers.
What I found out is, that I can reproduce the behaviour only with IE 9.

And on one machine it is very easy to let the items disappear
on the other I get at least one item disappeared.

Regards
Andrew

[Tsvyatko]

Hi Andrew,

 Thank you for the valuable feedback. It helped us identify that this issue occurs only in IE9. We will investigate it further to determine what is the exact cause of this issue. I have logged this in our PITS system where you can track its progress. I have also updated your telerik points accordingly.

Best wishes,
Tsvyatko
the Telerik team

[Aleksey Dyomin]

Hi

I have the same problem with drag & drop, you can see it at your demo http://demos.telerik.com/silverlight/#GridView/RowReorder ,
for convenience leave only items started with T : THEBI, THECR, TORTU, TRADH, TRAIH 
and do some drag drop & edit cell operations
you see that some items are disappears
I have this behavior with FireFox.

Thank you.

[Anatoly Chekh]

Hello
I have the same issue with tree view.
But I don't use drag and drop in general. I use only editing.
So after some clicks I cannot editing nodes. I also can reproduce this on you Live Demo!
So it seems that bug is not in the drag and drop manager.

Thanks, Anatoly Chekh!

[Yordanka]

Hello,

@Aleksey - Thank you for the feedback. The issue has been logged in our PITS system so you can track its status following the link provided by Tsvyatko.

@Anatoly - Please specify your problem in a separate thread under the corresponding Telerik control section. Thank you.
 
All the best,
Yordanka
the Telerik team