使用asp.net在sqlserver中锁定表的可能解决方案

Question

我一直在研究一种使用与多台PC共享的数据库的软件。该项目即将存储丢失的行李信息。我们已经提供了将新插入的记录复制到主DB中的功能。 现在发生的事情是，当多个用户尝试更新数据库的同时，单个项目在全局数据库中存储多次。

所以我试图使用TableLock using serializable但我在这里什么都没有。

修改

 query = "SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;BEGIN TRANSACTION;";
 insertdata(query); //using cmd.ExecuteNonQuery();
 query = "select * from Goods WITH (TABLOCKX)" ;
 DataSet dsGoods = getdata(query, "config");//Function to get the data
 updateitem();
 query = "COMMIT TRANSACTION";
 insertdata(query);//using cmd.ExecuteNonQuery();

updateitem（）如下

public static void updateitem()
{
            string query = "select * from config where param='lastsync'";
            DataSet ds = dataaccess.getdata(query, "config");
            query = "select isonlive,associateid,itemid,founddate,regdate,status,foundbyname,categoryid,subcatid,item,model,color,foundwhere,returnedtoname,showonline,officeid,isdeleted,(select username from [user] where userid=registeredby) as reguser,(select username from [user] where userid=returnby) as returnedby,notes,returneddate from  item ";
            String updatedDate =ds.Tables[0].Rows[0]["value"].ToString();
            if (updatedDate != "")
            {

                query = "select isonlive,associateid,itemid,founddate,regdate,foundbyname,status,categoryid,subcatid,item,model,color,foundwhere,returnedtoname,officeid,showonline,isdeleted,(select username from [user] where userid=registeredby) as reguser,(select username from [user] where userid=returnby) as returnedby,notes,returneddate from  item  where updateat >= @updateat";
            }
            System.Data.SqlClient.SqlCommand cmd = new SqlCommand(query);
            if (updatedDate != "")
            {
                cmd.Parameters.AddWithValue("@updateat",DateTime.ParseExact(updatedDate,"dd-MM-yyyy HH:mm:ss",null,System.Globalization.DateTimeStyles.None));
            }
            DataRow dr;
            ds = dataaccess.getdata(cmd, "item");
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                try
                {
                    int status = 0;
                    dr = ds.Tables[0].Rows[i];
                    if (dr["status"].ToString() == "Transferred")
                    {
                        status = 2;
                    }
                    else if (dr["status"].ToString() != "Received")
                    {
                        status = 1;
                    }



                    DateTime regdate = Convert.ToDateTime(dr["regdate"]);
                    DateTime founddate = Convert.ToDateTime(dr["founddate"]);
                    //returndatetime = String.Format("MMM dd yyyy H:mm:ss", returndate);

                    if (dr["showonline"].ToString() == "False")
                    {
                        status = 1;
                    }

                    if (dr["isdeleted"].ToString() == "true")
                    {
                        insertdata("delete from goods where AssociateID='" + dr["associateid"] + "' and ID='" + dr["itemid"] + "'");
                        continue;
                    }

                    if (dr["isonlive"].ToString() == "true")
                    {

                        query = "update goods set Status='" + status + "',officeid='" + dr["officeID"] + "', notes='" + dr["notes"].ToString().Replace("'", "''") + "',ReturnedTo='" + dr["returnedtoname"].ToString().Replace("'", "''") + "',founddate=@founddate,ReturnedDate=@returndate,ReturnedBy='" + dr["returnedby"].ToString().Replace("'", "''") +
                            "',Model='" + dr["model"].ToString().Replace("'", "''") + "',ColorID='" + dr["color"].ToString().Replace("'", "''") + "',FoundWhere='" + dr["foundwhere"].ToString().Replace("'", "''") + "',MainCat='" + dr["categoryid"] + "',SubCat='" + dr["subcatid"] + "',ItemID='" + dr["item"] + "'  where AssociateID='" + dr["associateid"] + "' and ID='" + dr["itemid"] + "'";
                    }
                    else
                    {
                        query = "select * from goods where AssociateID='" + dr["associateid"] + "' and ID='" + dr["itemid"] + "' and MainCat='" + dr["categoryid"] + "' and SubCat='" + dr["subcatid"] + "' and ItemID='" + dr["item"] + "'";
                        DataSet dsItems = getdata(query, "config");

                        if(dsItems.Tables[0].Rows.Count==0)
                        {
                            query = "insert into goods (AssociateID,ID,DateReg,Status,MainCat,SubCat,ItemID,Model,ColorID,FoundWhere,RegBy,FoundBy,ReturnedTo,ReturnedDate,ReturnedBy,Notes,IP,founddate,officeid) values('" + dr["associateid"] + "','" + dr["itemid"] + "',@regdate,'" + status + "'," +
                            "'" + dr["categoryid"] + "','" + dr["subcatid"] + "','" + dr["item"] + "','" + dr["model"].ToString().Replace("'", "''") + "','" + dr["color"].ToString().Replace("'", "''") + "'," +
                            "'" + dr["foundwhere"].ToString().Replace("'", "''") + "','" + dr["reguser"].ToString().Replace("'", "''") + "','" + dr["reguser"].ToString().Replace("'", "''") + "','" + dr["returnedtoname"].ToString().Replace("'", "''") + "',@returndate," +
                            "'" + dr["returnedby"].ToString().Replace("'", "''") + "','" + dr["notes"].ToString().Replace("'", "''") + "','',@founddate,'" + dr["officeID"].ToString() + "')";
                        }

                    }

                    SqlCommand sce = new SqlCommand(query);

                    if (dr["returneddate"].ToString() != "")
                    {

                        sce.Parameters.AddWithValue("@returndate", Convert.ToDateTime(dr["returneddate"]));
                    }
                    else
                    {
                        sce.Parameters.Add("@returndate", SqlDbType.DateTime).Value = DBNull.Value;
                    }

                    sce.Parameters.AddWithValue("@regdate", regdate);
                    sce.Parameters.AddWithValue("@founddate", founddate);
                    insertdata(sce);
                    query = "update item set isonlive = 'true',updateat=@updateDate where itemid = '" + dr["itemid"] + "'";
                    sce = new SqlCommand(query);
                    sce.Parameters.AddWithValue("@updateDate", DateTime.Now);
                    dataaccess.insertdata(sce);
                }
                catch (Exception ex)
                {
                    App.writelog(ex.Message + "\n" + ex.StackTrace);
                }

            }
}

P.S。：我希望通过ASP.Net完成它。