CsvHelper fluent class 映射 ConstructUsing() 在引用地图中被忽略了吗？

Question

我想知道我这样做是否正确，但我正在使用 CsvHelper 并定义了以下流畅的 class 映射：

        internal class WasteEstimationGenericDayCsvMap : CsvClassMap<WasteEstimationGenericDay>
        {
            public WasteEstimationGenericDayCsvMap(WasteEstimationGenericDay dayModel)
            {
                var qualityModel = dayModel.Quality;
                ConstructUsing(() => new WasteEstimationGenericDay(dayModel.ModelUnitContext));
                Map(m => m.InflowVolume).Name(dayModel.GetPropertyDisplayName(() => dayModel.InflowVolume));
                References<WasteStreamQualityCsvMap>(m => m.Quality, qualityModel);
            }
        }

        internal class WasteStreamQualityCsvMap : CsvClassMap<WasteStreamQuality>
        {
            public WasteStreamQualityCsvMap(WasteStreamQuality qualityModel)
            {
                ConstructUsing(() => new WasteStreamQuality(qualityModel.ModelUnitContext));
                Map(m => m.TotalNitrogen).Name(qualityModel.GetPropertyDisplayName(() => qualityModel.TotalNitrogen));
                Map(m => m.TotalPhosphorus).Name(qualityModel.GetPropertyDisplayName(() => qualityModel.TotalPhosphorus));
                Map(m => m.TotalDissolvedSalts).Name(qualityModel.GetPropertyDisplayName(() => qualityModel.TotalDissolvedSalts));
                Map(m => m.VolatileSolids).Name(qualityModel.GetPropertyDisplayName(() => qualityModel.VolatileSolids));
                Map(m => m.TotalSolids).Name(qualityModel.GetPropertyDisplayName(() => qualityModel.TotalSolids));
                Map(m => m.ElectricalConductivity).Name(qualityModel.GetPropertyDisplayName(() => qualityModel.ElectricalConductivity));
            }
        }

这些 class 映射旨在能够以不特定顺序将动态列名称映射到我的类型 WasteEstimationGenericDay，但是问题是在将值映射到我需要指定的类型之前这些值的单位，这就是为什么在每个 class 映射中指定 ConstructUsing() 以在映射类型的构造期间设置单位。

然而，对于属性 WasteEstimationGenericDay.Quality, theConstructUsing()` 语句中类型 WasteStreamQuality 的引用 class 映射，永远不会调用，也不会指定单位。有谁知道我的映射配置是否有问题？或者这是 CsvHelper 中的 bug/limitation?

我也试过在配置上分别注册两个 class 地图，如下所示：

      csvReaderConfig.RegisterClassMap(new WasteEstimationGenericDayCsvMap(dayModel));
      csvReaderConfig.RegisterClassMap(new WasteStreamQualityCsvMap(dayModel.Quality));

但它似乎没有任何影响，除非它是调用 CsvReader.GetRecords<T>() 时指定的类型。

感谢您的帮助。

Answer 1

将此问题作为 issue 发布后，我得到了以下回复：

Taking a quick look at the source (as I don't have a computer to test it on at the moment), it looks like that isn't implemented, but should be a pretty quick thing to do.

CsvHelper fluent class 映射 ConstructUsing() 在引用地图中被忽略了吗？

CsvHelper fluent class mapping ConstructUsing() ignored in referenced maps?

.net

c#

csv

.net-4.5

csvhelper