Question

在我的代码结束时，我正在调用一个存储过程，该存储过程根据我的页面传递的参数更新表。我收到以下错误：

过程或函数'Res_invpush_UpdateInv'需要参数'@InventoryPushSubscriptionId'，这是未提供的。

即使我认为我的参数值已成功通过 - 我知道这是因为我已经使用断点进行了测试，当我将鼠标悬停在所提到的参数上时，它给出的值为1，所以我不知道为什么消息仍然存在。

有人可以告诉我到底哪里出错或者如何解决？

SendInvUpdate.InvServices.UpdateRatePackagesRequest ur = new SendInvUpdate.InvServices.UpdateRatePackagesRequest();
    SendInvUpdate.InvServices.UpdateRatePackagesOperationResponse or = new SendInvUpdate.InvServices.UpdateRatePackagesOperationResponse();


    protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
            string connStr = ConfigurationManager.ConnectionStrings["bb"].ConnectionString;
            SqlConnection Con = new SqlConnection(connStr);
            Con.Open();
            SqlCommand cmd = new SqlCommand("invpush_PollForAvailableChanges", Con);
            cmd.CommandType = CommandType.StoredProcedure;
            SqlParameter NewSysChangeVersionParam = new SqlParameter("@NewSysChangeVersion", SqlDbType.Int);
            NewSysChangeVersionParam.Value = (object)NewSysChangeVersionParam ?? DBNull.Value;
            NewSysChangeVersionParam.Direction = ParameterDirection.InputOutput;
            NewSysChangeVersionParam.SqlDbType = SqlDbType.BigInt;
            SqlDataReader sdr = cmd.ExecuteReader();

            InventoryPushSubscriptionRecord rec = new InventoryPushSubscriptionRecord();

            while (sdr.Read())
            {

                rec.InventoryPushSubId = sdr.GetInt32(0);
                rec.CMName = sdr.GetString(1);
                rec.NotifUrl = sdr.GetString(2);
                rec.Options = sdr.GetString(3);
                rec.LastSysChangeVersion = sdr.IsDBNull(4)?(long?)null:sdr.GetInt32(4);

            }

            if(!sdr.NextResult()) throw new System.Exception("Expected Result set 1 for InventoryChangeRecord");
            InventoryChangeRecord inrec = new InventoryChangeRecord();
            while (sdr.Read())
            {
                inrec.InventoryPushSubId= sdr.GetInt32(0);
                inrec.SysChangeVersion=sdr.IsDBNull(1)?(long?)null:sdr.GetInt32(1);
                inrec.InvDate=sdr.GetDateTime(2);
                inrec.ResId=sdr.GetInt32(3);
                inrec.RoomType=sdr.GetString(4);
                inrec.InvCount=sdr.GetInt32(5);
                inrec.ResName=sdr.GetString(6);

            }

            sdr.Close();
            sdr.Dispose();

            if (NewSysChangeVersionParam != null)
            {
                SendInvUpdate.InvServices.InventoryServiceClient isc = new SendInvUpdate.InvServices.InventoryServiceClient();
                        or = isc.UpdateRatePackages(request);


                        res = or.Results.ToString();
                        int Subid;
                        SubId=inrec.InventoryPushSubscriptionId;
                        SqlCommand ucmd = new SqlCommand("Res_invpush_UpdateInv", Con);
                        ucmd.CommandType = CommandType.StoredProcedure;
                        SqlParameter LastChange = new SqlParameter("@NewLastSysChangeVersion", SqlDbType.Int);
                        LastChange.Value = NewSysChangeVersionParam;
                        SqlParameter SubscriptionId = new SqlParameter("InventoryPushSubscriptionId", SqlDbType.Int);
                        SubscriptionId.Value = SubId;
                        ucmd.ExecuteNonQuery();


                    }

                }
            }                             

        }

        catch (Exception ex)
        {
            throw (ex);
        }
    }

}

Answer 1

您没有为命令对象设置parameters属性，您的代码是

SqlCommand ucmd = new SqlCommand("Res_invpush_UpdateInv", Con);
                    ucmd.CommandType = CommandType.StoredProcedure;

                    SqlParameter LastChange = new SqlParameter("@NewLastSysChangeVersion", SqlDbType.Int);
                    LastChange.Value = NewSysChangeVersionParam;

                    SqlParameter SubscriptionId = new SqlParameter("InventoryPushSubscriptionId", SqlDbType.Int);

您可以看到该参数未分配给命令对象的参数属性，因此存储过程未获取参数。只需在ExecuteNonQuery语句之前添加以下内容，

command.Parameters.Add(LastChange);
command.Parameters.Add(SubscriptionId );

Answer 2

首先，正如迈克所提到的，你应该与参数命名保持一致。

e.g。

SqlParameter SubscriptionId = new SqlParameter("InventoryPushSubscriptionId", SqlDbType.Int);

应该是

SqlParameter SubscriptionId = new SqlParameter("@InventoryPushSubscriptionId", SqlDbType.Int);

然后正如@NSGaga指出的那样，你并没有真正将参数传递给命令，你只是创建了对象并且没有在任何地方使用它们。

像这样：

SqlParameter LastChange = new SqlParameter("@NewLastSysChangeVersion", SqlDbType.Int);
LastChange.Value = NewSysChangeVersionParam;
ucmd.Parameters.Add(LastChange);
SubscriptionId = new SqlParameter("@InventoryPushSubscriptionId", SqlDbType.Int);
SubscriptionId.Value = SubId;
ucmd.Parameters.Add(SubscriptionId);

希望这有帮助

过程需要一个未提供的参数

2 个答案: