十进制到双精度

Question

I have something like this.....

foreach (var pupilAvg in pupilsAvgs) {
    Report_TeachersPosition teacher = new Report_TeachersPosition();
    teacher.ORG_ID = pupilAvg.ORG_ID;
    teacher.Yearcode = pupilAvg.YearCode;
    teacher.Teacher_K5 = pupilAvg.PupilsAvg_K5 / ratio.ClassKto5;
    teacher.Teacher_6to8 = pupilAvg.PupilsAvg_6to8 / ratio.Class6to8;
    teacher.Teacher_9to12 = pupilAvg.PupilsAvg_9to12 / ratio.Class9to12;
    teacher.Teacher_EPSFTE = teacher.Teacher_K5 + teacher.Teacher_6to8 
                             + teacher.Teacher_9to12;
    teacher.Teacher_Adjusted_EPSSalary = teacher.Teacher_SAUEPSMatrix
                                         * teacher.Teacher_Ratio;
    teacher.Teacher_ElementarySalary = teacher.Teacher_Adjusted_EPSSalary 
                                       * entities.Report_Attending_Pupils_Avg.ToList()
                                       .Where(x => x.ORG_ID == pupilAvg.ORG_ID 
                                       && x.YearCode.Equals("" + yearCode))
                                       .FirstOrDefault().PupilsAvg_K8_Percentage;
    teacher.Teacher_SecondarySalary = teacher.Teacher_Adjusted_EPSSalary 
                                      * entities.Report_Attending_Pupils_Avg.ToList()
                                      .Where(x => x.ORG_ID == pupilAvg.ORG_ID 
                                      && x.YearCode.Equals("" + yearCode))
                                      .FirstOrDefault().PupilsAvg_9to12_Percentage;
}

but the class is...

public partial class Report_TeachersPosition {
        public int ORG_ID { get; set; }
        public Nullable<int> Yearcode { get; set; }
        public Nullable<decimal> Teacher_K5 { get; set; }
        public Nullable<decimal> Teacher_6to8 { get; set; }
        public Nullable<decimal> Teacher_K8 { get; set; }
        public Nullable<decimal> Teacher_9to12 { get; set; }
        public Nullable<decimal> Teacher_EPSFTE { get; set; }
        public Nullable<decimal> Teacher_ActualFTE { get; set; }
        public Nullable<decimal> Teacher_Ratio { get; set; }
        public Nullable<decimal> Teacher_TotalSalary { get; set; }
        public Nullable<decimal> Teacher_ElementarySalary { get; set; }
        public Nullable<decimal> Teacher_SecondarySalary { get; set; }
        public Nullable<decimal> Teacher_SAUEPSMatrix { get; set; }
        public Nullable<decimal> Teacher_Adjusted_EPSSalary { get; set; }
}

the problem is... In the class Report_TeachersPosition , I have all decimal values from database . And I want them to be in double . So i change it into double and save it. but when I open it again, Its back to decimal .. I dont know why.. Can somebody help????

Answer 1

If your database is storing the values as decimal then everytime you fetch them from the database they are always going to come back as decimal .

The more important question is why do you want the values as double ? If it's for display purposes then I would recommend you use appropriate formatting. Bare in mind, you will lose accuracy when you convert from decimal to double .

Answer 2

Is public partial class Report_TeachersPosition a database generated class? (I suppose yes). You must change type of database table column and then regenerate model class