I have prepared a program with Visual Basic 2010 and I am using a SQL Server 2008 database. (service based database) it works properly. But sometimes (when I don't use computer for a period like 2 hours) I try to start my program on VB (F5), it waits, and then gives this error:
A network-related or instance-specific error occured while
establishing a connection to SQL Server. The server was not found or
is not accesible. Verify that the instance name is correct and that
SQL Server name is configured to allow remote connections. (provider:
SQL Network Interfaces, error: 26 - Error Locating Server/Instance
Specified.)
I have googled it, but nothing helps. I'm afraid this error will be a problem when the user uses the program. How might I solve this?
Probably the network connection turn off after some time. Check System Operating power setting's option
The same issue I faced and got resolved by trying this - in run type services.msc:
the services window will pop up
in that SQL Server(SQLEXPRESS) start this service.
make sure SQL Browser service is running.
Related
I need help with SQL server in visual studio. I can't seem to connect my visual studio with internal SQL server. I had created a database with visual studio earlier and it was working fine but now i'm getting an error saying:
The attempt to attach to the database failed with the following
information: 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: SQL Network Interfaces, error: 50 - Local Database Runtime
error occurred. Cannot create an automatic instance. See the Windows
Application event log for error details.
I have tried to create a new database file in a new project but then i get the error:
A network related or instance specific error occurred while
establishing a connection. The server was not found or was not
accessible. (Provider:Named Pipes Provider, error:40- could not open a
connection to SQL server.
I have tried different things but can't seem to get the hang of the problem. I reinstalled visual studio too but that didn't work either. what can i do to get rid of this error and get my database back online?
If you are running Visual Studio on your local machine, you have not any problem with firewalls and enabling of TCP/IP.
Try this four solutions may fix your problem:
SQL Server Express LocalDB add-on, get it from this link.
Make sure that your SQL service is running.
Use SQL Server Authentication.
Make sure you have typed .\sqlexpress in Server name in Add Connection window. You should use a backslash \ as the separator, not a forward slash.
I am working locally on new laptop (windows 8 x64) with SQL Express 2012 SP1 x64, and I get the following connection error:
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Kindly notice that service sqlserver is running and that shared memory, TCP/IP, Named Pipes are all enabled.
Sometimes connection is successful but only for a while.
Usually I get the connection error.
Any ideas how to resolve this issue?
Thanks in advance
Check in Windows Services, sometimes the instance of SQL Server is stopped after some updates either in Visual Studio or SQL Server. I think you mean, sometimes IT IS NOT connecting, but after some seconds it does work. Am I correct?
I've renamed my computer, sql Express was looking for the database server on the wrong path. Renaming computer back or updating path would fix that.
That might not be your issue, but help someone else.
Instead of SQL Express - can you connect to and use - (localdb)/v11.0 ?
localdb is lighter weight comparing to sqlexpress and it is the recommended way for developers to put some data quickly in SQL. Also note that localdb does NOT run as a service but as an app, so it might be easier to connect to it. Here is a question discussing other differences.
First off, I only have a very basic understanding of SQL. I can create tables etc. but configuration is beyond me. I am running my web site with MVC3 ASP.Net on a windows 2008 server using SQL Express.
Everything works fine, my connection strings are correct, I can use the website and it reads and writes to the dB, I can also view the dB with management studio on the server.
Today I got the following error:
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: SQL
Network Interfaces, error: 26 - Error Locating Server/Instance
Specified)
When I tried to log on to the database in management studio on the server I get a similar error. the only fix I have found is for a server restart. The database was down for 6 hours before I noticed which is not good for a start up website.
Has any one seen this issue before? Is this an express issue? Any help or advice would be great.
Troubleshoot as you would any network error. Start with the server's event logs.
As for notification of downtime, there are a lot of web services that will monitor your web site and email or send you an SMS message if it's not responding. Two that I've used are uptimerobot.com and basicstate.com. There are dozens of others.
You could also rewrite your ASP.Net app to email or text you when certain kinds of errors happen.
I have a service that talks to local instance of SQL Server. I am getting an error
System.Data.SqlClient.SqlException:
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)
This error happens intermittently. Since this is part of my continuous integration process its painful as I have to carry out whole build process again.
I would like to make this clear that I am not getting the issue every time its random in nature.
Please help me with this.
Have you tried toggling the various connection interfaces via the SQL Server Confoguration tool? I suspect you may be connecting via TCP/IP, which could be the subject of network issues elsewhere. Because you're local to the server, you could disable that interface and force the use of Shared Memory, which should help you troubleshoot the problem.
For more information on the connection types, see http://msdn.microsoft.com/en-us/library/ms187892.aspx
WHen i try to connect to SQL Express 2005 from Visual Web Developer Express 2008, i was getting errors like 'Could not load file or assembly Microsoft.SqlServer.Management.Sdk.Sfc' .
I read some posts which advised me to download and install 3 applications to address above issue ( SharedManagementObjects.msi, sqlncli.msi,SQLSysClrTypes.msi ).
I did that and now i get a different connection error
'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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) '.
Does anyone know a way of overcoming this ?
Thanks.
How are you trying to connect ? Just a regular ADO.NET connection? If so, what's your connection string?
Are you trying to use SMO (SQL Mgmt Objects)? This sounds like some of your SMO objects aren't available for some reason - you might want to download and reinstall those SMO components from here. The files you want are quite a bit down the page, under the heading of "Microsoft SQL Server 2005 Management Objects Collection" - files are called "SQLServer2005_XMO.msi" (with some x64 variations).
Does installing that MSI help at all?
Marc
PS: okay, thanks, based on your comment - can you try this connection string here:
string connectionString = #"Server=.\SQLEXPRESS2005;Database=DBName;Integrated Security=SSPI";
If you are running SQL Sever Express locally another thing you may want to do check in the Services console (WinKey, Run, 'services.msc') and verify that you have SQL Server and SQL Server Agent entries and that they are both running.
I think this problem is certainly with your connection string. Try doing this
Run the SQL Management Express, and get the server instance name from it.
Usually this problem occurs when the server instance name is wrong (on many computers it could be SQLEXPRESS).