RadListPicker does not always display the popup window

[Gavin]

Hi,

I have upgraded to the latest set of controls for NoDo, (Q2 2011) and the listpicker popup window is not always being drawn.
The app was functionig correctly with the Q1 2011 set of controls.

I have 2 list pickers on the page.In the page constructor I am setting the ItemsSource of the first one to a collection of Objects which is held as a property on my App.
The ItemsSource for the second list picker is set using a LINQ query run on this same collection so it contains all the items except the 1 that is selected in the first list picker.
There are approximately 20 items in the collection.

If the selected item is the first item in the list then when you tap on the list picker to select a different item the popup with the list does not display.
If you touch the screen again anywhere then it is displayed.
Of course if this second touch of the screen is a Tap then it only briefly displays the list before closing again as it has selected the item that should have been displayed at the position that was just tapped.

To reiterate
1. the listpicker has the first item in the list selected.
2. user taps on the listpicker to open the list
3. the list is not displayed
4. touch the screen again and the list gets displayed
5. if the touch in step 4 is a tap then it selects the item that should have been displayed in that location

If any of the other items in the list are actually selected then there is no problem.

Can anyone help me sort this out?

Thanks
Gavin

[Georgi]

Hi Gavin,

Thank you for contacting us.

This bug was introduced when we added support for ensuring the visibility of the selected item in Popup mode. The bug is now fixed in the latest SP1 release for Mango but the bug is still present in the NoDo version. Do you have plans to upgrade to Mango soon or you will support two versions of your application? If this is the case we will prepare an internal build of our NoDo version which will have the fix so that you can update your app.

Let me know how to proceed.

Best wishes,
Georgi
the Telerik team

[Gavin]

Hi,

We are going to have 2 versions of our app so if you could supply a fixed NoDo version it would be very helpful.

Thanks
Gavin

[Georgi]

Hi Gavin,

I am happy to inform you that we have prepared an internal build that fixes the issue. The download should be available through your Telerik account.

Do not hesitate to write us back should you have any other problems/questions with our tools.

Regards,
Georgi
the Telerik team