小编jdm*_*310的帖子

由于逐行反射相当昂贵,我一直在寻找构建和插入实体的更快的替代方案.我做了一些关于这个主题的研究,并且还发现了一些性能比较,这似乎表明表达树是要走的路.我将如何重写以下功能以利用此功能？

    public static void InsertTable(IEnumerable<DataTable> chunkedTable)
    {

        Parallel.ForEach(
            chunkedTable,
            new ParallelOptions
            {
                MaxDegreeOfParallelism = Convert.ToInt32(ConfigurationManager.AppSettings["MaxThreads"])
            },
            chunk =>
            {
                Realty_Records_ProdEntities entities = null;
                try
                {
                    entities = new Realty_Records_ProdEntities();
                    entities.Configuration.AutoDetectChangesEnabled = false;

                    foreach (DataRow dr in chunk.Rows)
                    {
                        var parcelToInsert = new Parcel();

                        foreach (DataColumn c in dr.Table.Columns)
                        {
                            var propertyInfo = parcelToInsert.GetType()
                                .GetProperty(
                                    c.ColumnName,
                                    BindingFlags.SetProperty | BindingFlags.IgnoreCase
                                    | BindingFlags.Public | BindingFlags.Instance);

                            propertyInfo?.SetValue(
                                parcelToInsert,
                                TaxDataFunction.ChangeType(
                                    dr[c.ColumnName],
                                    propertyInfo.PropertyType),
                                null);
                        }
                        entities.Parcels.Add(parcelToInsert);
                    }
                    entities.SaveChanges();
                }
                catch (Exception ex) …