linq - string value can't accept it. Operator >= cannot be applied to operands of type string and datetime?

Question

I tried the ParseMethod method but it didn't work. how can i fix this error?

request.searchStartDate = request.searchStartDate == DateTime.MinValue ? DateTime.MinValue : request.searchStartDate;
request.searchEndDate = request.searchEndDate == DateTime.MinValue ? DateTime.MaxValue : request.searchEndDate;

and Linq query;

(q.OvertimeRequestDateTime >= request.searchStartDate && q.OvertimeRequestDateTime <= request.searchEndDate) 

Answer 1

等待大神解答