qData.col1 = (int?) eReader["col1"] != null? (int?)eReader["col1"] : null;
qData.col1_per = (decimal?)eReader["col1_per"];
qData.col2 = (int?)eReader["col2"];
qData.col2_per = (decimal?)eReader["col2_per"];
//I want to map but when data is null then i get error. like this...qData.col1 = (int?) eReader["col1"]; //Please help how can solve this problem.