没有错误，但 delete/update 查询在 C# 中不起作用

Question

我正在开展一个项目，在该项目中我使用的是 Access 2007 数据库 (.accdb) 而不是 SQL 服务器。为了执行 CRUD 操作，我使用 MS Access 的查询，因为我以前的代码是使用存储过程编写的。我也在使用 SQL 交易。

这是我的代码：

public int OrderId { get; set; }
public string OrderDate { get; set; }
public int ServiceMode { get; set; }
public string DeliveryDate { get; set; }
public int ClientId { get; set; }
public int TotalQty { get; set; }
public decimal TotalAmount { get; set; }
public int Discount { get; set; }
public decimal DiscAmount { get; set; }
public decimal NetTotal { get; set; }
public decimal Advance { get; set; }
public decimal Due { get; set; }

 public bool Update(DataTable itemList)
 {
            using (var conn = new OleDbConnection(Sniper.ConnString))
            {
                conn.Open();

                using (var trans = conn.BeginTransaction())
                {
                    try
                    {
                        using (var cmd = new OleDbCommand())
                        {
                            cmd.Transaction = trans;
                            cmd.Connection = conn;
                            cmd.CommandType = CommandType.Text;
                            cmd.CommandText = string.Format("DELETE FROM OrderMaster WHERE OrderId={0}", OrderId);
                            cmd.ExecuteNonQuery();
                            cmd.CommandText = string.Format("DELETE FROM OrderDetails WHERE OrderId={0}", OrderId);
                            cmd.ExecuteNonQuery();
                            cmd.CommandText = string.Format("DELETE FROM OrderStatus WHERE OrderId={0}", OrderId);
                            cmd.ExecuteNonQuery();
                        }

                        using (var cmd = new OleDbCommand("qry_OrderMaster_Insert", conn))
                        {
                            cmd.CommandType = CommandType.StoredProcedure;
                            cmd.Transaction = trans;
                            cmd.Parameters.AddWithValue("@OrderId", OrderId);
                            cmd.Parameters.AddWithValue("@OrderDate", OrderDate);
                            cmd.Parameters.AddWithValue("@ServiceMode", ServiceMode);
                            cmd.Parameters.AddWithValue("@DeliveryDate", DeliveryDate);
                            cmd.Parameters.AddWithValue("@ClientId", ClientId);
                            cmd.Parameters.AddWithValue("@TotalQty", TotalQty);
                            cmd.Parameters.AddWithValue("@TotalAmount", TotalAmount);
                            cmd.Parameters.AddWithValue("@Discount", Discount);
                            cmd.Parameters.AddWithValue("@DiscAmount", DiscAmount);
                            cmd.Parameters.AddWithValue("@NetTotal", NetTotal);
                            cmd.Parameters.AddWithValue("@Advance", Advance);
                            cmd.Parameters.AddWithValue("@Due", Due);
                            cmd.ExecuteNonQuery();
                        }

                        using (var cmd = new OleDbCommand("qry_OrderStatus_Insert", conn))
                        {
                            cmd.CommandType = CommandType.StoredProcedure;
                            cmd.Transaction = trans;
                            cmd.Parameters.AddWithValue("@OrderId", OrderId);
                            cmd.Parameters.AddWithValue("@IsDelivered", 0);
                            cmd.Parameters.AddWithValue("@IsCancelled", 0);
                            cmd.ExecuteNonQuery();
                        }

                        foreach (DataRow row in itemList.Rows)
                        {
                            using (var cmd = new OleDbCommand("qry_OrderDetails_Insert", conn))
                            {
                                cmd.CommandType = CommandType.StoredProcedure;
                                cmd.Transaction = trans;
                                cmd.Parameters.AddWithValue("@OrderId", OrderId);
                                cmd.Parameters.AddWithValue("@ItemId", row["ItemId"].ToInt());
                                cmd.Parameters.AddWithValue("@Qty", row["Qty"].ToInt());
                                cmd.Parameters.AddWithValue("@UnitPrice", row["UnitPrice"].ToPrice());
                                cmd.Parameters.AddWithValue("@Service", row["Service"].ToString());
                                cmd.Parameters.AddWithValue("@Remarks", row["Remarks"].ToString());
                                cmd.Parameters.AddWithValue("@SI", row["SI"].ToString());
                                cmd.Parameters.AddWithValue("@TotalPrice", row["TotalPrice"].ToString());
                                cmd.ExecuteNonQuery();
                            }
                        }

                        trans.Commit();
                        return true;
                    }
                    catch (Exception)
                    {
                        trans.Rollback();
                        return false;
                    }
                }

这段代码执行没有任何错误，但它没有删除记录，也没有将记录作为重复记录插入。

Answer 1

我按照保罗所说的解决了这个问题。 OrderId 的值无效。

Answer 2

你不应该使用 "string.format"。你应该命名参数。你可以写一个基本的验证器。

if(this.OrderID <= 0)
{
throw new ArgumentOutOfRangeException("Please provide an OrderID");
}

OleDbCommand Command = new OleDbCommand();
Command.Connection = Connection;

OleDbParameter paramOrderId = new OleDbParameter();
Parameter1.OleDbType = OleDbType.VarChar;
Parameter1.ParamterName = "@OrderId";
Parameter1.Value = this.OrderID;


Command.Parameters.Add(paramOrderId );

没有错误，但 delete/update 查询在 C# 中不起作用

No error, but delete/update query not working in c#

c#

ms-access-2007