[Solved] Issues with filtering (bug and broken link)

[Andrew]

First this link appears to be broken in your documentation on Fitering the gridview

How to style the column header of the filtered column.

on this page http://www.telerik.com/help/silverlight/gridview-overview-filtering.html

Second, when filtering a DataGrid, if there is a checkbox column, the filtering options are limited to the values currenly on the screen.  When using a paged data set and server side paging, that is not very useful.  How do I force it to show both the True and False options always???

and what event is triggered when a user changes And to Or or Or to And in the filter selection box?  Anything else triggers filtering and filtered events, that setting being changed does not trigger either, and should trigger both.

[Veselin Vasilev]

Hi Andrew,

We have fixed the link immediately.
Thank you for your notification.

You can subscribe to the DistinctValuesLoading event and check if e.Column is your boolean column. If so, set the e.ItemsSource to a list of true and false values.

I did not understood your last question. Could you please explain it in more detail?

Thanks

Kind regards,
Veselin Vasilev
the Telerik team

[Andrew]

<telerik:GridViewCheckBoxColumn DataMemberBinding="{Binding Display}" ShowDistinctFilters="False" ShowFieldFilters="True"/>

With these settings, no filtering can be done at all.
But if you use distinct filters and the screen is filled with all checked or unchecked items, that is the ONLY choice you get.

FieldFilters for a checkbox column should be
Checked
Unchecked

or
True
False

And in that case you don't need a second set of options, since that would be redundant.

 

[Andrew]

although I firmly believe this is a bug you should fix, is there a workaround perhaps using a template for filtering control just for boolean columns?

[Veselin Vasilev]

Hello Andrew,

Have you tried the workaround I gave you by subscribing to the DistinctValuesLoading event?
Didn't it help?

You can check this blog post on how to create a custom filtering control.

Greetings,
Veselin Vasilev
the Telerik team

[Andrew]

Not yet since I am sure its a bug, so I thought I would wait and focus on other issues while you fixed it.