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SQL Server: connection.Open fails without throwing an exception

Posted on 2008-10-14
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Last Modified: 2013-12-17
Greetings,
In the code snippet below - I place a SQL Server connection.Open in a try block incase it throws an exception.
If I mung the server name in the connection string, and single step it - the Open simply hangs, without throwing an exception.

What am I missing?

Thanks much - Ken
string connectProject = Properties.Settings.Default.PS2007ReportingConnection;
            string projectSQL = "SELECT ProjectUID, ProjectName, BaaN_ProjectID FROM MSP_EpmProject_UserView";
            OutputUtilsLogs ulog = new OutputUtilsLogs();
            DataTable dt = new DataTable();
 
            using (SqlConnection connection = new SqlConnection(connectProject))
            {
                SqlCommand command = new SqlCommand(projectSQL, connection);
 
                try
                {
                    connection.Open();
                }
                catch (Exception ex)
                {
                    ulog.writeNTConsoleAndEventLog(ex, "Actuals", "--SQL connection Open from getProjectView failed.");
                    throw (ex);
                }

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Question by:kenfhenderson
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BrandonGalderisi earned 500 total points
ID: 22717408
A failed connection may not be exception.  Or, the connection timeout is just set so high (like 0 for indefinite) that it appears to be hung when it is just trying to connect.  You may want to try dropping the connection timeout lower.  I think if a db doesn't respond in 5 second it's been too long.
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Author Closing Comment

by:kenfhenderson
ID: 31506155
That's exactly what it was!
Thanks for the super quick answer.
Ken
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Expert Comment

by:trunghieubkit
ID: 22717491
Replace yours by
string connectProject = "";
you'll see exception
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