Hi Thayaparan
Kumarakuru,
Thanks for contacting syncfusion forum.
Query: when I click the filter option, I get inside the data
manager "where = NULL", Please help me filter the data.
We checked your query by preparing sample, but we were unable to
reproduce the issue at our end. While initially filtering any column, then only
where property has a value, else it will have a null value. Where property has
a value only after filtering a column.
Please refer to the below sample,
https://www.syncfusion.com/downloads/support/directtrac/general/ze/Issue_with_Data-1927001273
Please refer to the below screenshot,

Still if you are facing the issue, kindly get back to us
with the below requested details,
- Share the
detailed explanation of your issue/ requirement
- Share the
complete code example
- If
possible, share the issue reproducible sample or reproduce the issue on
shared sample.
- Share
the screenshot/ video demo of your issue.
The provided information will
be helpful to provide you response as early as possible.
Regards,
Pon selva