Error Connecting To Sietch Sql
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Cannot Connect To Sql Server A Network Related Or Instance-specific
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://stackoverflow.com/questions/12531258/automatically-switching-connection-string-on-database-connection-error this site About Us Learn more about Stack Overflow the company Business http://stackoverflow.com/questions/26135346/sql-connection-error-system-data-sqlclient-sqlexception-0x80131904 Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign sql error up Automatically switching connection string on database connection error up vote 1 down vote favorite I'm dealing with a C# application with a EntityFramework backbone using a DbContext. The application has two choices: connect to a remote SQL server express or connect to a local SQL compact 4.0 database in case the network connection is not available. When my application starts, a thread error connecting to is checking if a connection to the remote database is possible. Otherwise it automatically needs to switch the connection string and provider in order to connect to the local database. So far I was trying to deal with this issue by modifying the connection string section in app.config and forcing the application to refresh the section, after saving the configuration. This approach is not the best since I need to have access rights to write into the app.config file. Could you suggest a better approach? sql-server entity-framework sql-server-ce database-connection connection-string share|improve this question asked Sep 21 '12 at 13:10 Francesco 52711134 Where are you storing the two connection strings ? –pleinolijf Sep 21 '12 at 13:16 In two constants in a class –Francesco Sep 21 '12 at 13:23 add a comment| 2 Answers 2 active oldest votes up vote 0 down vote accepted The DbContext constructor accepts either the name of the connection string, or the actual connection string you want to choose. What you could do, is test your initial connection string - maybe with a quick ado connection or
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up SQL Connection Error: System.Data.SqlClient.SqlException (0x80131904) up vote 9 down vote favorite 2 I am seeing this in several situations and it is intermittent in our web based application connecting to SQL 2008 R2 serve back end. Users are coming across a point 2 point connection and seeing this on and off. Thought it was bandwidth issues until I started seeing it on terminal servers that are on the same core switch as this SQL server. I have checked remote connection enabled, Port 1433 is set correctly in Configuration for TCP/IP and the only thing I see that could be a cause is the timeout setting is set to 100000 in the remote connections rather than unlimited. The error is System.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) ---> System.ComponentModel.Win32Exception (0x80004005): The network path was not found at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.Conne