ADO.NET：更快的方法来检查，如果数据库服务器可以访问？ [英] ADO.NET: Faster way to check if the database server is accessible?

问题描述

目前，我用这code，检查数据库访问：

At the moment I am using this code to check if the database is accessible:

public bool IsDatabaseOnline(string con)
{
    bool isConnected = false;
    SQLConnection connect = null;

    try {
        connect = new SQLConnection(con);
        connect.Open();
        isConnected = true;

    } catch (Exception e) {
        isConnected = false;

    } finally {
        if (connect != null)
            connect.Close();
    }

    return isConnected;
}

虽然这code正常工作，有一个缺点。如果服务器不在线也花费大约4个整体秒试图打开决定，这是以前无法获得的连接。

While this code works fine, there is a disadvantage. If the server is not online it spends about 4 full seconds trying to open the connection before deciding that it is not available.

有没有一种方法来测试，但不尝试实际打开它，并等待超时的连接？就像一个数据库，相当于平？

Is there a way to test the connection without trying to actually opening it and waiting for the timeout? Something like a database-equivalent of ping?

推荐答案

您可以只更改连接超时时间更短。做一些测试，看看你可以再低，仍然是可靠的。我敢打赌，你可以得到接近500毫秒。

You could just change the connection timeout to be shorter. Do some testing and see how low you can go and still be reliable. I bet you could get close to 500ms.

<一个href="http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.connectiontimeout.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.connectiontimeout.aspx

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