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Filter and Aggregate Functions with GridViewExpressionColumns

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Heiko Görig
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Heiko Görig asked on 17 Jan 2011, 07:08 PM
Hello,

Is it possible to enable filtering for expression columns and to use aggregate function over calculated values or do you plan to add these features?

Regards,

Heiko

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Yavor Georgiev
Telerik team
answered on 18 Jan 2011, 03:29 PM
Hi Heiko Görig,

 We have plans to introduce filtering UI to the Expression column, but I cannot say exactly when this feature will be available. You can, however, use the new generic FilterDescriptor<T> class (you can read more about it here). You can use the expression in the GridViewExpressionColumn and programmatically build a boolean binary expression that you can use in the generic FilterDescriptor.

 You can also use the new generic AggregateFunction<TElement, TResult> and feed it the GridViewExpressionColumn's expression.

Greetings,
Yavor Georgiev
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stauder
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answered on 08 Feb 2011, 09:32 AM
Sorry, wrong post, erase it please
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Joel
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answered on 25 Jul 2011, 10:10 PM
Hello,

I am wondering if there is an update on when filtering will be enabled for the GridViewExpressionColumn?

Is there a possible workaround to get the same filtering functionality of the GridViewBoundColumnBase?

Thanks,
Joel
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Nedyalko Nikolov
Telerik team
answered on 29 Jul 2011, 01:04 PM
Hello Joel,

This feature is in our TODO list, unfortunately I cannot commit with any specific date or release when it will be ready.

Kind regards,
Nedyalko Nikolov
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Kumar
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answered on 11 Nov 2011, 05:02 PM
Any progress on this feature please?

Thanks,
Kumar
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Bastian
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answered on 06 Dec 2011, 04:09 PM
Hi,

i also need this feature is there any progress?

best regards

Bastian
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Nedyalko Nikolov
Telerik team
answered on 09 Dec 2011, 07:17 AM
Hello,

We've made a research about adding filtering to GridViewExpressionColumn. Unfortunately we end up with a conclusion that we cannot add the "default" filtering control without some breaking changes, which is not an option. We are investigating some other approaches, but I cannot commit when we will add filtering functionality for GridViewExpressionColumn out-of-the-box. However for the time being you can take a look at the following blog posts - about creating custom filtering control (which in fact was the initial idea about filtering support for GridViewExpressionColumn).
Sorry for the inconvenience caused.

Link1
Link2

Regards,
Nedyalko Nikolov
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Heiko Görig
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Yavor Georgiev
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stauder
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Joel
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Nedyalko Nikolov
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Kumar
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Bastian
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