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我有这样的东西......

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;
}

但这class是...

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; }
}

问题是......在 中class Report_TeachersPosition，我拥有decimal来自 的所有值database。我希望他们在double。所以我把它改成double并保存。但是当我再次打开它时，它又回到了decimal..我不知道为什么..有人可以帮忙吗？？？？

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2 回答 2

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如果您的数据库将值存储为，decimal那么每次您从数据库中获取它们时，它们总是会以decimal.

更重要的问题是为什么你想要这些值double？如果是出于显示目的，那么我建议您使用适当的格式。请记住，当您从 转换为 时，您将失去decimal准确性double。

于 2012-08-22T12:47:29.153 回答
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公共部分类 Report_TeachersPosition 是数据库生成的类吗？（我想是的）。您必须更改数据库表列的类型，然后重新生成模型类

于 2012-08-22T12:45:11.443 回答