How may I persist Column FilterDescriptors for the Virtual Grid?

[Joe]

I am using filtering with a custom DataProvider for my Virtual Grid.   Users use the popup dialog to set filter conditions.  It works well. 

I understand how to retrieve the filter descriptors from one grid and to apply them to another.  But how may I persist them?

I want to save to a text file a set of filters from VirtualGrid A.   Then, later on, I wan to  set VirtualGrid B columns to to use those same filters purely from that persisted text? 


I can see that ColumnFilterDescriptor.ToString() will give me what looks like a full  persistable filter expression.  At least it looks like a meaningful expression.  But I canntot see a method to go the other way

[Dimitar]

Hi Joe,

I am afraid that we do not have an automatic way of restoring this string. I have logged a feature request for this on your behalf. You can track its progress, subscribe to status changes, and add your comment to it here: VirtualGrid/GridView: Add a way to save the Filter/Sort/Group descriptors to a string or a file. I have updated your Telerik points for this report. 

As an alternative, you can use the PersisastanceFramework to store this: WPF PersistenceFramework - Save in a Stream. 

Another approach is storing descriptor properties in a separate object that can be easily serialized. I have implemented a small sample project that shows this. It is not meant as a complete solution and may need additional implementation and testing. 

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
Progress Telerik

[Joe]

Thank you, Dimitar.  I appreciate the sample application.   I will take a look at it and see if I can implement the approach in mine.

[Dimitar]

Hi Joe, 

Ok, do not hesitate to contact us if you have other questions.