Hi TurricanDE,

It’s my fault for the wrong behavior, because the default filters for the SmartGrid others and the ones that I shared are all the filters available for the SmartGrid.

This is how the filter conditions list should be in order to get the right results:

 List<string> stringConditions = new List<string> (){  
                "EMPTY",
                "NOT_EMPTY",
                "CONTAINS",
                "DOES_NOT_CONTAIN",
                "STARTS_WITH",
                "ENDS_WITH",
                "EQUAL",
                "NOT_EQUAL",
                "NULL",
                "NOT_NULL"
              };

Let me know if this works for you!

Please, do not hesitate to contact us if you have any additional questions.

Best regards,
Yavor Dashev

Smart UI Team
https://www.htmlelements.com/