带有标识的SQLBulkCopy在目标表中插入

Question

我试图用SQLBulkCopy向SQL Server插入一个通用列表,

我在Identity Field遇到麻烦

我想要我的目标表来生成标识字段我应该如何处理这个,这是我的代码

using (var bulkCopy = new SqlBulkCopy(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
                {
                    bulkCopy.BatchSize = (int)DetailLines;
                    bulkCopy.DestinationTableName = "dbo.tMyTable";

                    var table = new DataTable();
                    var props = TypeDescriptor.GetProperties(typeof(tBFFormularyStatusList))
                        //Dirty hack to make sure we only have system data types 
                        //i.e. filter out the relationships/collections
                                               .Cast<PropertyDescriptor>()
                                               .Where(propertyInfo => propertyInfo.PropertyType.Namespace.Equals("System"))
                                               .ToArray();
                    foreach (var propertyInfo in props)
                    {
                        bulkCopy.ColumnMappings.Add(propertyInfo.Name, propertyInfo.Name);
                        table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyType) ?? propertyInfo.PropertyType);
                    }

                    var values = new object[props.Length];
                    foreach (var item in myGenericList)
                    {
                        for (var i = 0; i < values.Length; i++)
                        {
                            values[i] = props[i].GetValue(item);
                        }

                        table.Rows.Add(values);
                    }

                    bulkCopy.WriteToServer(table);
                }

例外

Property accessor 'ID' on object 'ProcessFlatFiles.DetailsClass' threw the following exception:'Object does not match target type.'

我也试过了

using (var bulkCopy = new SqlBulkCopy(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString, SqlBulkCopyOptions.KeepIdentity))
                {

Answer 1

最后我用这种方式工作了

    using (var bulkCopy = new SqlBulkCopy(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString, SqlBulkCopyOptions.KeepNulls & SqlBulkCopyOptions.KeepIdentity))
                {
                    bulkCopy.BatchSize = (int)DetailLines;
                    bulkCopy.DestinationTableName = "dbo.myTable";
                    bulkCopy.ColumnMappings.Clear();
                    bulkCopy.ColumnMappings.Add("SourceColumnName", "DestinationColumnName");
                    bulkCopy.ColumnMappings.Add("SourceColumnName", "DestinationColumnName");
                    bulkCopy.ColumnMappings.Add("SourceColumnName", "DestinationColumnName");
                    bulkCopy.ColumnMappings.Add("SourceColumnName", "DestinationColumnName");
                    .
                    .
                    .
                    .
                    bulkCopy.ColumnMappings.Add("SourceColumnName", "DestinationColumnName");

                    bulkCopy.WriteToServer(datatable);
                }