Clearing values from dropdowntree after setDataSource is used

[Roohi]

     Hi,

I have a situation where I am setting the dataSource of a dropdowntree after defining it (using the setDropDown method). Howerver, I can't seem to be able to clear values from the dropdowntree in this scenario.

I tried to replicate the problem best I could in this dojo: https://dojo.telerik.com/iKoBOVIk/3

Upon selecting item 1 and item 2, if I click the button I want the selected values to be cleared. How can I achieve this?

Thanks.

[Ivan Danchev]

Hello Roohi,

This behavior is due to a known bug of the DropDownTree when using its setDataSource method. See this Github issue for more details.

Regards,
Ivan Danchev
Progress Telerik

[Roohi]

Hi,

Just wanted to let you know that I found a fix by using the kendo HierarchicalDataSource instead of a normal array to pass into the setDataSource function.

Here's an updated version of the previous demo that uses the fix: https://dojo.telerik.com/iKoBOVIk/5

Thanks for your time!

[Ivan Danchev]

Hi Roohi,

Actually even if you pass HierarchicalDataSource to the setDataSource method the issue will still be reproducible: dojo example.

The scenario would be: the DropDownTree already has a dataSource set. Some of the items are selected and then you set a new dataSource. The previously selected items are not cleared. The workaround is to clear the value before setting the new dataSource:

dropdowntree.value([]);
dropdowntree.setDataSource(test_dataSource);

 

Regards,
Ivan Danchev
Progress Telerik

[Lee]

I just tried doing this and was unsuccessful. It triggers the change event anyway. 

[Martin]

Hello, Lee, 

Could you please modify the example provided by my colleague to reproduce the issue?

[Lee]

Here is a modification of the example.

[Martin]

Hello, Lee,

Here is the modified example to prevent triggering the events.