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POHow to Implement Exchange like availability monitoring of internal SQL Server
 

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  1. POHow to Implement Exchange like availability monitoring of internal SQL Server
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    <p>We have an internal app(<strong><em>Thick Client</em></strong>) that relies on our central SQL server. The app is a Desktop app that allows the users to work in "Offline" mode (e.g. Outlook). What I need to accomplish is a way to accurately tell if SQL is available or not.</p> <h2>What I have so far:</h2> <p>I currently use the following method --></p> <pre><code> internal static void CheckSQLAvailability() { using (TcpClient tcpc = new TcpClient()) { try { tcpc.Connect(Settings.Default.LiveSQLServer, Settings.Default.LiveSQLServerPort); IsSQLAvailable = true; } catch { IsSQLAvailable = false; } } } </code></pre> <p>I am not crazy about this approach for the following reasons. </p> <ul> <li>Prone to false Negatives</li> <li>Needs to be "<strong>manually</strong>" called</li> <li>Seems "smelly" (<em>the try/catch</em>)</li> </ul> <p>I had thought to use a timer and just call this every X(3??) minutes and also, if a negative result, try a second time to reduce the false negatives.</p> <p>There is a similar question here --><a href="https://stackoverflow.com/questions/22979/detecting-if-sql-server-is-running">Detecting if SQL server is running</a> but it differs from mine in these ways:</p> <ul> <li>I am only checking 1 server</li> <li>I am looking for a reactive way versus proactive</li> </ul> <p>So in the end, is there a more elegant way to do this? It would all be "in-network" detection.</p> <p>P.S. To offer some background as requested in an answer below: My app is a Basic CRUD app that can connect to our Central SQL Server or a local SQLExpress Server. I have a Merge Replication Module that keeps them in Sync and the DAL is bound to a <code>User.Setting</code> value. I can, already, manually flip them from Central to Local and back. I just want to implement a way to have it automatically do this. I have a <code>NetworkChangeDetection</code> class that works quite well but, obviously, does not detect the Remote SQL's.</p>
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    1. COPossible duplicate of: [Detecting if SQL server is running](http://stackoverflow.com/questions/22979/detecting-if-sql-server-is-running)
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      1. USJoe Stefanelli
    2. CO@Joe: possibly, though that would be sad as I think I like my solution better then either proposed solution in that thread. Especially since neither of those answers any of my 3 concerns.
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    3. CO@People voting to close. Could one of you explain How the linked question answers my question? I am failing to see it.
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