Cannot extended select all the items when GridView is bound to VirtualQueryableCollectionView

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Last Updated: 01 Oct 2018 12:25 by K

ADMIN

Dimitrina

Created on: 01 May 2013 08:03

Category: GridView

Type: Bug Report

Cannot extended select all the items when GridView is bound to VirtualQueryableCollectionView

1. Select the first row.
2. Hit Ctrl-End to jump to the end of the list. 
3. Hold down the Shift key and select the last row. 
4. Scroll up and notice that everything between the first page and the last page is not selected.

* there is a sample project attached in the support thread

4 comments

Posted on: 01 Oct 2018 12:25

Hello :)

I came across the same problem.
I tried to work around that by implementing CTRL+A as a first approach by myself.
But that brought me another problem.

I changed the LoadSize at runtime, what makes the entries I want to select available. But after doing that, operating the control became impossible because Scrolling caused a Long loading time. I tried resetting the LoadSize after selecting elements but that erased the selection (See my example Project).

Any ideas how to overcome this behavior?

I know, this is a really complex issue but I'm still disappointed by now, that there isn't a solution to that CTRL+A stuff. Please, if possible, push the priority of these things to a higher Level so that they are investigated in next steps of development.

Have a good one :)

Attached Files:

ExampleApplication.zip

jura

Posted on: 24 Aug 2015 07:45

Here is my thread with suggestions regarding virtualized multiselection:
http://www.telerik.com/forums/virtualization-with-multiselection

Marek

ADMIN

Dimitrina

Posted on: 05 Mar 2015 13:05

Hello Karan,

After some more detailed research on the issue, it seems that it cannot be resolved having the current design of VirtualQueryableCollectionView. The idea of the collection is to load only the items needed at the moment, i.e. those that are visible. All the items that are not in the view port are not available till you scroll to them. In that case the user moves up and down and requests different parts of the data.
Its purpose is to only download items on demand and it is not possible to select an item that is not actually presented in RadGridView. 
I am afraid the reason for the problem is that the data is still not loaded. You can also check our online documentation: http://docs.telerik.com/devtools/wpf/controls/radgridview/populating-with-data/Populating-DataVirtualization.

Regards,
Didie

Amit

Posted on: 16 Jan 2015 04:50

Is Telerik looking into this and planning to provide a fix soon?
Would like to know.