VNVignesh Natarajan Syncfusion Team February 25, 2019 06:22 AM
Thanks for using Syncfusion products.
Query: "How can I filter custom columns?"
From your query, we understand that you need to filter the template column. Operations like filtering, sorting, grouping will be based on the field value of column property. From your code example we could find that you have not defined the field property to template column. So we suggest you to define the field value to column. Based on the field value column will filtered or sorted etc.
refer the below code example
Refer our UG Documentation note section for your reference