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FilterDescriptor on two members

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developer asked on 16 Jul 2014, 12:29 PM
Hi

I need to give to the user the possibility to build filter not only between a Member and a value (like Column1 = 10) but also between two members (like Column1 >= Column2).

How could I do?

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Dimitrina
Telerik team
answered on 17 Jul 2014, 01:18 PM
Hello,

This FilterDescriptors collection can contain CompositeFilterDescriptor or FilterDescriptor instances. The CompositeFilterDescriptor contains other descriptors and combines them with a logical operator of OR or AND. The simple FilterDescriptor class is a leaf of the tree and contains a Member, Operator, Value, MemberType.
I am afraid there is not a way to compare between two members.

Regards,
Didie
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answered on 17 Jul 2014, 01:31 PM
I'm developing a workaround to implement this feature.

Basically, I created my own EditorTemplate where the user can choose to insert a static value or select an item from a Combobox which is populated with che Member of my object.

The only problem that I found is that I have to cast each member from my datasource to a string member. Because if I create a filter on a Integer member the value can't be a string (in my situation the value would be the member name, which is a string). But this solution isn't perfect because if all the Member are string I can't use every comparision operator, but only the ones that work with the string type. What can you suggest to me? Are there any way to avoid this limitation?









































































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answered on 17 Jul 2014, 01:33 PM
Sorry for the white spaces, it has been a mistake
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Dimitrina
Telerik team
answered on 18 Jul 2014, 02:34 PM
Hello,

Basically you can check the Create Custom Filter Editors article. If this is not what you need, may I ask you to open a new support ticket and send me a demo project illustrating your attempt?

Regards,
Didie
Telerik
 
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