Custom Filter Row

[Alan]

Hi,

 

 I'm looking to use the RadGridView with a specfic use case for filtering.  We're in an MVVM setup, where filtering of the data rows is performed in the viewmodel rather than in the view.  However, I'd still like to use a filter row in this setup.  

 

Effectively, I want that filter row to be able to bind to our own FilterViewModel property in the view model that represents it.  Imagine this as just a TextBox for each column sitting in the filter row on top that is represented by a Dictionary<string,string> in the viewmodel: where the key is the column unique name, and the value is what the user entered for that textbox.  Behind the scenes, when this dictionary changes, we will perform the filtering ourselves.

 

As far as I understand it, this would require a custom filter control in the filter row of the RadGridView, and notification when the user changes a value in one of those filters.  However, it seems like it's impossible to use the filtering row or indicators of the RadGridView without using IFilterDescriptors or other Telerik-specific filtering items.  Is that true?  How could I make this scenario work?

 

 I'm able to do this to a certain extent with Infragistics controls -- we're evaluating Telerik to move over to and this is fairly critical to that process. 

 

 Thanks,

Alan

[Dimitrina]

Hi Alan,

As it turns out customizing the FilterRow does not suggest so many options compared to the Popup filter control. As a developer, you are not limited to the default filtering user interface provided by RadGridView when in Popup filtering mode. Please refer to the documentation on Custom Filtering Controls. You can also check Handing the actual Grid Filtering yourself topic where a sample project is attached.

In case you would like to use the built-in infrastructure, you can check this forum thread and download a test project demonstrating how to customize the default behavior for the editors in FilterRow.

Regards,
Dimitrina
Telerik

[Alan]

[quote]Dimitrina said:
As it turns out customizing the FilterRow does not suggest so many options compared to the Popup filter control.
[/quote]

 So are you saying that using a custom filtering control (inheriting from IFilterControl) does not work when the filtering mode is FilterRow?

[Dimitrina]

Hello,

Yes, this is correct. It is also stated in the referred article.

Regards,
Dimitrina
Telerik

[Alan]

Thanks!  Appreciate the help.