Hi Andrii,
Greetings from Syncfusion support.
We are not able to understand your requirement clearly with the provided data. So please share us the following information to validate further on this,
- By, “All of them work with strings only” - What type of data do you wish to filter in the columns?
- By, “But to filter by CustomerId, not by name” - Can you elaborate on this?
- By, “(As it is shown in all examples)” – Can you let us know which examples you are referring to by this?
- Pictorial representation of requirement.
Let us know if you have any concerns.
Regards,
Sujith R