在一个事务范围内处理多个数据库连接

Question

我写HV以下功能having two database context于一体transaction scope。我使用MySql与EF 5.0

 private static void SyncPremiumStores(JoyRydeWebPortalData.joyryde_WebPortalEntities contextWebPortal, JoyRydeMallStoreData.joyryde_MallStoreEntities contextMallStore)
    {
        using (TransactionScope scope = new TransactionScope())
        {
            foreach (var objWebPortalPremiumStore in contextWebPortal.tbl_premium_store.Where(x => x.INT_DATA_TRANS_STATUS == 0).ToList())
            {
                try
                {
                    var objMallStore = contextMallStore.tbl_store.Where(x => x.LNG_STORE_ID == objWebPortalPremiumStore.LNG_STORE_ID).FirstOrDefault();
                    if (objMallStore != null)
                    {
                        JoyRydeMallStoreData.tbl_premium_store objMallPremiumStore = new JoyRydeMallStoreData.tbl_premium_store()
                        {
                            DAT_CREATED = objWebPortalPremiumStore.DAT_CREATED,
                            DAT_PREMIUM_FROM = objWebPortalPremiumStore.DAT_PREMIUM_FROM,
                            DAT_PREMIUM_TO = objWebPortalPremiumStore.DAT_PREMIUM_TO,
                            LNG_PRIMARY_STORE_ID = objMallStore.LNG_PRIMARY_STORE_ID,
                            LNG_STORE_ID = objMallStore.LNG_STORE_ID,
                            TXT_PACK_NAME = ""
                        };
                        contextMallStore.tbl_premium_store.Add(objMallPremiumStore);
                        objWebPortalPremiumStore.INT_DATA_TRANS_STATUS = 1;
                    }

                    contextMallStore.SaveChanges();
                    contextWebPortal.SaveChanges();
                    scope.Complete();
                }
                catch (Exception ex)
                {
                    LogUtility.WriteErrorLog(ex);
                }
            }
        }
    }

在执行时，它会引发我的错误

var objMallStore = contextMallStore.tbl_store.Where(x => x.LNG_STORE_ID == objWebPortalPremiumStore.LNG_STORE_ID).FirstOrDefault(); 带有内部异常消息的行

Multiple simultaneous connections or connections with different connection strings inside the same transaction are not currently supported.

我需要在单个事务中更新两个不同的数据库。怎么办？？

Answer 1

我相信这是 MySQL 的限制，因为只有 XA 事务支持分布式事务（参与全局事务的多个独立事务资源）。

据我所知，MySql .net 连接器确实支持分布式事务。尝试AutoEnlist=false在连接字符串中设置。