The C1GridView now supports filtering by FilterExpression in C1TemplateField in the grid.

• doFilter - This is the client-side method. It works with two parameters - headerText and filterExpression.
• OnFiltering - This is the server-side event. End-users can implement their own customized filtering logic in this event.

In this sample, customized filtering process that use FilterExpression is implemented in ApplyFilterExpression() method. This code is to be executed in corresponding server-side event of user action (like Filtering, Sorting, Paging, etc).