Is it possible to use the treeList filter programmatically

[Gers]

Is it possible to use the treeList filter programmatically ? 

For example , let's say I have a treeList with a searchBox, once the user tap something in the searchBox , I programmatically apply the filter using directly the "contains" option and show the result to the user.

[Nikolay Rusev]

Hello Gers,

 

TreeListDataSource inherits from DataSource and as such it has the same filtering API.

 

Regards,
Nikolay Rusev
Telerik

 

 

[Gers]

Superb !! I'm going to check that API.

Thank you Nikolay . 

[Randy]

I just discovered a bug in the treelist. where if you set the dataSource and filter programmatically, while have a remote resource, it will only return 1 item for some reason. However if I use Grid, then I don't have any issue with that. 

[Alex Hajigeorgieva]

Hello, Randy,

Are you referring to server operations - using the load on demand functionality and server filtering?

It would be most helpful if you let me know how reproduce the behaviour. If the node is collapsed and then you expand it, would one of the children meet the filter conditions?

Kind Regards,
Alex Hajigeorgieva
Progress Telerik

[Gary]

Unfortunately, having a filter on the TreeList dataSource and specifying that nodes be collapsed causes the pagination to break, with the calculation of the number of pages being incorrect. Change this sample:

https://demos.telerik.com/kendo-ui/treelist/local-data-binding

... such that there is a filter on the dataSource:

filter: { field: "Position", operator: "neq", value: "Team Lead" }

... and set dataSource.schema.model.expanded: false

There will be 7 pages displayed with content in only the first.

 

[Alex Hajigeorgieva]

Hello, Gary,

Thank you for pointing this out. It appears that we already have this bug logged in our repository here:

https://github.com/telerik/kendo-ui-core/issues/5491

And the same is linked in our Feedback portal and I voted on your behalf here:

https://feedback.telerik.com/kendo-jquery-ui/1447153-tree-list-shows-wrong-total-and-paging-when-we-expand-or-collapse-a-row-after-filtering

The higher the priority and severity of an issue, the sooner it is scheduled for implementation.

Kind Regards,
Alex Hajigeorgieva
Progress Telerik