Question

我正在尝试创建一个全有或全无的大型transactionScope。我正在插入大约2000条记录。我想插入主键，将其读回然后在事务中插入外键，然后在发生错误时将所有内容回滚。

PSS_InvoiceTotal表有PK - ＆gt; InvoiceTotalID

PSS_Invoices表具有FK - ＆gt; InvoiceTotalID

每次创建2个主键行时，问题出现在数据库中。我运行没有外键插入的代码，它工作正常。有没有办法阻止它制作2个主键行？

        using (TransactionScope scope = new TransactionScope(TransactionScopeOption.Required))
        {
            try
            {
                conn.Open();

                foreach (var uniqueSupply in supplyList.GroupBy(a=>a.ShipTo))
                {
                    //reset total 
                    total = 0;

                    var supplyListByShipTo = supplyList.Where(a => a.ShipTo == uniqueSupply.Key);

                    foreach (var addSupply in supplyListByShipTo)
                    {
                        total = total + addSupply.Amount;
                    }

                    StringBuilder insert_PSS_InvoiceTotal = new StringBuilder();

                    //save total to DB
                    insert_PSS_InvoiceTotal = new StringBuilder();
                    insert_PSS_InvoiceTotal.Append("INSERT INTO [PSS_InvoiceTotal] ");
                    insert_PSS_InvoiceTotal.Append("([InvoiceDate],[Amount]) ");
                    insert_PSS_InvoiceTotal.Append("VALUES(@DateTime, @Amount) ");
                    insert_PSS_InvoiceTotal.Append("SELECT SCOPE_IDENTITY() AS [InvoiceTotalID];");

                    cmd = new SqlCommand(insert_PSS_InvoiceTotal.ToString(), conn);

                    cmd.Parameters.AddWithValue("@DateTime", DateTime.Now);
                    cmd.Parameters.AddWithValue("@Amount", total);

                    //ToDo: Add back in later
                    cmd.ExecuteNonQuery();

                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.Read())
                    {
                        InvoiceTotalID = Convert.ToInt32(dr["InvoiceTotalID"].ToString());
                    }

                    dr.Close();

                    foreach (var supply in supplyListByShipTo)
                    {
                        StringBuilder insert_PSS_Invoice = new StringBuilder();

                        //Create the SQL command
                        insert_PSS_Invoice.Append("INSERT INTO [PSS_Invoices] ");
                        insert_PSS_Invoice.Append("([ClientDetailId],Amount],InvoiceTotalId)");
                        insert_PSS_Invoice.Append("VALUES(");
                        insert_PSS_Invoice.Append("@Amount,@InvoiceTotalId)");

                        cmd = new SqlCommand(insert_PSS_Invoice.ToString(), conn);

                        cmd.Parameters.AddWithValue("@Amount", 4.44);
                        cmd.Parameters.AddWithValue("@InvoiceTotalId", InvoiceTotalID);

                        //ToDo: put back in later
                        cmd.ExecuteNonQuery();
                    }
                }

                //Close connection
                conn.Close();

                //Commit and Dispose Transaction
                scope.Complete();
                scope.Dispose();
            }

            catch (Exception ex)
            {
                //Rollback Transaction
                scope.Dispose();
                return Json(new { success = false, message = ex.ToString() }, JsonRequestBehavior.AllowGet);
            }
        }

Answer 1

尝试发表评论

 //ToDo: Add back in later
 //cmd.ExecuteNonQuery();

Answer 2

您可以考虑使用INSERT命令的OUTPUT选项来获取插入执行的主键。这样你就不必回头了。查看此链接：https://msdn.microsoft.com/en-us/library/ms177564.aspx

此外，您可能需要向命令对象添加输出参数以获取该信息。

TransactionScope主键插入然后外键插入 - ＆gt;插入2个主键行

2 个答案: