Approved
Last Updated: 12 Aug 2019 13:12 by ADMIN
Igor
Created on: 05 Aug 2019 07:12
Category: Kendo UI for jQuery
Type: Feature Request
3
Virtualization and Total

Hello.

When I tried your framework, I found a lot of positive and useful components, but unfortunately in our conditions I can not fully use the components with virtualization, because they can not work without counting the number of records. I have a lot of data and any scrolling, page selection, components such as combobox, dropdownlist, pager, grid, etc., every time i have to count the total number, and the queries are complex, not just select * from. Performance drops immediately, imagine i'm scrolling through a combobox, where there are 6 million records, where on every page Iihave to do select count(*) from table .. join...join... where .... and add to that another 100 users that all scroll the same combobox, for example.  It would be great to be able to simply load data page by page without counting the total, but remove invisible elements from the DOM if the number of pages loaded is greater than a certain number.

Some other commercial frameworks have similar things.

I would not like to look for other alternatives, because you have done a very good and high-quality work. Maybe there are workarounds to this problem?

I'm not just talking about the grid, such controls combobox, dropdown do not have the functionality of endless scrolling. I'd like to see something like

https://github.com/ElemeFE/vue-infinite-scroll

 

And you can find out when the interface should finish scrolling by an empty response from the server, when there is no more data.

Why not just scroll through the list, adding a portion of data without a total, if the next portion is empty, then finished.

You have even the library train sewn count number when calling ToDataSourceResult on IQueryable

https://github.com/kendo-labs/dlinq-helpers/blob/master/Kendo.DynamicLinq/QueryableExtensions.cs

Counting the number of rows on complex queries is a rather expensive operation.

I would very much like to see such functionality on your widgets

 

 

 PS: I have already talked on this topic with your developers 

Ticket details

Ticket ID
1422245
Type
Support


2 comments
ADMIN
Ivan Danchev
Posted on: 12 Aug 2019 13:12
Hello,

Thank you for submitting this feature request. We will monitor the community's interest in the endless scrolling functionality and will consider implementing it in a future release.

Regards,
Ivan Danchev
Progress Telerik
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Anton
Posted on: 05 Aug 2019 13:39

Yes, our company fully agrees! We are also interested in this functionality. We will be glad if this post does not go unnoticed!