I've built an application in vb.net with Visual Studio 2015 which I need to update now. I need to update the Table Adapter through Dataset Designer but when I click Configure on the Query I get the error:
Failed to open a connection to the database
"The client was unable to establish a connection because of an error
during connection initialization process before login.
Possible causes include the following: the client tried to connect to
an unsupported version of SQL Server; the server was too busy to
accept new connections; or there was a resource limitation
(insufficient memory or maximum allowed connections) on the server.
(provider: Named Pipes Provider, error: 0 - No process is on the other
end of the pipe.)"
Check the connection and try again.
Previously this worked just fine. The application still works fine and connects to the MS SQL server using the same connection string. I'm using the .NET Framework Data provider for SQL Server. See images.
Dataset Designer -> Configure / Edit Query
Error message after I click on Configure + Connection String
It's important to note that the application connects using the same Connection String and everything worked fine previously.
SOLVED! Figured out the problem. The "Named Pipes" setting in the SQL configuration was disabled. First I tried to access the server via IP address and succeded. Then I checked under SQL Server Configuration Manager -> SQL Server Network Configuration -> Protocols for -> Named Pipes and it was Disabled. I've set it to Enabled. I have no idea why it switched do Disabled, it was not like this before.
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 have two Win 7 64 bit machines.
On the first one I have installed SQL Server 2008 R2 Express and have no trouble connecting via Management Studio with Windows Auth and also via SQL Auth with a user I set up on the database.
On the second machine I am trying to connect to the database on machine 1 using Management Studio. I'm trying SQL Auth. I therefore obviously also can't connect to it via connection string in my .NET Code
I can ping the first machine from the second.
Things I have tried include the following:
On the machine the database is installed make sure the firewall is allowing connection on Port 1433
Made sure SQL Server service is running
Made sure SQL Server Browser service is running
Created an exception for sqlbrowser.exe in the firewall
Enabled TCP/IP Protocol through SQL Configuration manager
Allowed Remote connections in SQL Server Management Studio
The error I get is:
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
This is the connection string I use in code
Data Source=xxx.xxx.xxx.xxx\sqlexpress;Initial Catalog=dbName;User Id=myUser;Password=myPassword;
This can be caused by a number of reasons but I'm glad my suggestion about checking firewall ports (rather than just allowing a one-way exception for SQL Browser) led you to the answer: the firewall wasn't allowing the correct port # through.
If i remember correctly SQL Server disables remote connections by default.
Please check whether remote connections are enabled and enable them if not:
RMB on Server in Management Studio Object Explorer -> Properties -> Connections -> Allow remote connections...
I have deployed one vb.net desktop application and sql server is used for backend. It is properly working on local machine but when accessing database from remote machine it giving the error in the title.
I have done these things already:
Started SQL server, sql browser service using sql server configuration manager.
added the sql server, browser exe in to firewall allowed program list.
restarted sql server and browser.
enabled TCP/IP, Shared memory, Named pipes in SQL server configuration manager
enabled the remote connection for this DB in database property
We're attempting to deploy an existing SQL Server/SSRS configuration to a new set of hardware. SSRS is running on the same server as the SQL Server database we're trying to get reports from.
Whenever we attempt to test any of the reports, we receive the error:
An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'sqlConnection'. (rsErrorOpeningConnection)
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
The Windows user has full rights to the server.
The logins all appear to exist.
TCP is running.
Named instances are fine.
SQL Browser Service is running
"sqlcmd -L" shows the database server listed
I'm at a complete loss.
Create a udl file, if it connects then the problem is the code / application, if it does not connect, then it's your firewall, connections string, dll library, service you are running IIS under not having the right permissions etc etc. Well the important thing here is probably the connection string. Do the following: create an empty text file and rename it "myconnection.udl". Now double click on the file and it will launch an applet. You can configuer the connection to your database and test it. (it will pick up registered connection libraries etc). If it gives OK, then open the udl file in notepad, you will see the correct connection string. Paste to your app connection settings. UDL files are generally misunderstood. They are simply a text file that holds the connection settings. They then call the connection dll. If the udl file works then you have a correct connection string 100%
We created a new report and deployed it and it just worked. After some investigation, the report that I had been asked to use as a test initially has a parameter that defaults to connect to a completely different SQL Server which the new environment cannot, and should not see. All the other reports are working.
My guess is that we actually corrected the problem early on when we modified the service credentials, but by then we had fallen into a loop of testing against what turned out to be a bugged report.
TLDR: There was a bug in the report we were testing against. We had already corrected the problem and didn't even realize it because, apparently, we're idiots.
I am using Windows-server-2008 with Microsoft SQL Server 2008.
And there are a lot of questions about this, but nothing on the internet solved it.
The problem is that i can't connect to the my SQL Server 2008 R2 after rebooting my server.
I placed some new memory in my server, and after rebooting my client/server application didn't work anymore because it cannot reach the database.
So i tried to get in SQL Server Management Studio (SSMS), and tried to loggin with Administrator and another user but both do not work.
When i logg in the following message is displayed:
Cannot connect to (local)
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)
(Microsoft SQL Server, Error: 2)
I Tried a lot of different things like:
Rebooting server
Try to start the server manually from Sql Server Configuration Manager
Named Pipes - Enabled
TCP/IP - Enabled
Tried to create an new system user or database user as described in the following article: Click Here
Can somebody please help me? I am really confused because i need to get this online. Otherwise i have to reinstall the database server but i do not have a back-up. (is there some folder with a back-up of the settings/tables/columns are stored and can be imported from reinstall?
I was having the exact same problem. net start mssqlserver was giving me the blurb about a failed login attempt. The problem was that I had recently changed the password for the administrator account, and the new password didn't get updated in services.
Here's how I fixed it:
First locate SQL Server from the list here:
Right click and select properties, and navigate to the Log On tab:
Then I typed the new password, and like magic I was able to start SQL Server right through the services manager.
I also did this for any other processes which were marked as "stopped" even though Startup Type was marked as "automatic" (namely, SQL Server Agent).
Is it a named instance or default? Also, is this a local instance? (I see the "(local)" but just wanted to make sure.)
Start the sql server services from services.msc and try to connect