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Editorial Team
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Asked: 2026-05-27T15:53:56+00:00

I am trying to create a simple web form which will give me a

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I am trying to create a simple web form which will give me a service restart button onscreen.

Upon clicking the button, I am creating an SMO object to talk to a SQL Server database and trying to stop and start the MSSQLSERVER service. All goes well until the Stop() method is called, at which point an exception is thrown stating:

Access is denied. (Exception from HRESULT: 0x80070005
(E_ACCESSDENIED))

The code under the button is as follows:

// connect the to server
ManagedComputer computer = 
    new ManagedComputer("172.16.150.52",@"Administrator","secret");

// return if there is a problem
if (computer.Services["MSSQLSERVER"] == null)
{
    PageErrorMessage = "Bad or missing service \"MSSQLSERVER\"";
    return;
}

// get the SQL Server Service
Service sqlServer = computer.Services["MSSQLSERVER"];

// is the server running?
if (sqlServer.ServiceState == ServiceState.Running)
    sqlServer.Stop();

// wait for it to stop completely
int timeout = 0;
while (sqlServer.ServiceState != ServiceState.Stopped || timeout <= 60)
{
    Thread.Sleep(1000);
    sqlServer.Refresh();
    timeout++;
}

if (timeout > 60)
{
    PageErrorMessage = "Stop operation has timed out after 60secs";
    return;
}

// start it again!
sqlServer.Start();

The IP address, username & password are 100% correct. Does anyone know why this would throw an AccessDenied exception?

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1 Answer

  1. Editorial Team

    It sounds like you’re missing the UAC. Often, to do system-wide tasks such as rebooting, shutting down (and probably also starting/stopping services), you have to get the elevated priviliges, which includes obtaining a token, etc.

    Take a look at this article – http://www.codeproject.com/KB/vista-security/UAC__The_Definitive_Guide.aspx – it has helped me on a few occasions.

    But http://www.codeproject.com/KB/vista-security/ElevatedPrivilegesDemand.aspx might also be helpful.

    I have only ever done this client side myself – I don’t know how it works when running on a server. For that, you might want to take a look at: http://blogs.msdn.com/b/lightswitch/archive/2011/04/07/how-to-elevate-permissions-in-server-code-ravi-eda.aspx

    And if it’s not code, but configuration, take a look at this: http://www.lansweeper.com/kb/WMI-Access-is-denied.aspx

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