简体繁体 English

在客户端的SQL Server 2012中检测断开的连接

[英]Detect broken connection in SQL Server 2012 on the client side

原文 2017-08-13 08:09:58 1 1 c#/ sql-server/ keep-alive

We are developing a C# program for connecting with a database and sending some packets to the database, then storing the data into the database. 我们正在开发一个C＃程序，用于与数据库连接并将一些数据包发送到数据库，然后将数据存储到数据库中。 C# program and SQL Server are on two separate computers, and we want to ensure that connection between C# program and SQL Server is always established. C＃程序和SQL Server位于两台单独的计算机上，我们希望确保始终在C＃程序和SQL Server之间建立连接。 If this connection is broken, we must try again to connect to SQL Server. 如果此连接断开，则必须再次尝试连接到SQL Server。

But we have some problems: 但是我们有一些问题：

After establishing connection, if we stop SQL Server, the client side (C# program) is not notified of the closed connection. 建立连接后，如果我们停止SQL Server，则不会通知客户端（C＃程序）已关闭的连接。 After sending a packet from client to SQL Server, we detect broken connection. 从客户端向SQL Server发送数据包后，我们检测到断开的连接。 Note : we don't like to loose any packets 注意：我们不希望丢失任何数据包
If we unplug the Ethernet cable between the two computers, the client side will notice the broken connection after sending a packet, after approximately 20 seconds, and in this interval we may loose several packets. 如果我们拔掉两台计算机之间的以太网电缆，则客户端将在发送数据包后大约20秒后注意到断开的连接，在此间隔内，我们可能会丢失几个数据包。

Is there quicker and reliable methods to detect broken/closed connection in SQL Server? 是否有更快，更可靠的方法来检测SQL Server中的断开/关闭连接？

1 个解决方案

Read through this article. 通读这篇文章。 It should give yo u enough info about how you should be implementing your solution. 它应该为您提供有关应如何实施解决方案的足够信息。 https://blogs.msdn.microsoft.com/cesardelatorre/2017/03/26/using-resilient-entity-framework-core-sql-connections-and-transactions-retries-with-exponential-backoff/ https://blogs.msdn.microsoft.com/cesardelatorre/2017/03/26/using-resilient-entity-framework-core-sql-connections-and-transactions-retries-with-exponential-backoff/

Edits: In regards with not wanting to loose packets, it completely depends on your implementation. 编辑：关于不想丢失数据包，这完全取决于您的实现。 If there is an exception you might want to persist the data and retry sending the data when connection is back up again. 如果发生异常，您可能希望保留数据并在再次备份连接时重试发送数据。