I've made a copy of my database (which is on Azure) on local SQLExpress server. On this server I have user "Tester" that has db_owner role for that database.
I can easily connect to it using Microsoft SQL Server Management Studio using server name: (LocalDb)\MSSQLLocalDB, SQL Server Authentication and "Tester" user credentials. but when I connect to it in my code with connection string like:
const string ConnectionString =
"Server=(LocalDb)\\MSSQLLocalDB;" +
"Initial Catalog=Integration-Tests;" +
"Persist Security Info=False;" +
"User ID=Tester;" +
"Password=secretPassword;" +
"MultipleActiveResultSets=False;" +
"Encrypt=True;" +
"TrustServerCertificate=False;" +
"Connection Timeout=30;";
using (var connection = new SqlConnection(ConnectionString))
{
try
{
connection.Open(); // Exception thrown
/* some more code that doesn't matter */
}
finally
{
connection.Close();
}
}
I get following exception thrown:
A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: Named Pipes Provider, error: 0 - No process is on the other end of the pipe.)
Earlier I was getting something else, but I guess it could be a simple typo since it stopped happening, I'm including it just in case it helps:
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. The specified LocalDB instance does not exist.
As stated earlier, everything works fine both on Azure, and I can connect to my LocalDb through SSMS.
Does anyone have any idea what could be cause of this error?
I've found the answer, posting it for anyone who ever has same problem:
I realized there was no verifiable server certificate, and according to Microsoft documentation, with Encrypt=true in my connection string:
Encryption occurs only if there is a verifiable server certificate, otherwise the connection attempt fails.
Indeed, the error code could be a little more descriptive... but all I had to do, was to remove Encrypt part from connection string.
Related
I am unable to connect to SQL Servers that have the '\' char which is used when connecting to a server instance. Any other type of server works without any issues. Any support or resource on this issue would be extremely helpful as I have exhausted my possible solutions.
Thanks!
Chris
I have tried:
- adding/removing the '#'
- using a double '\'
- hard coding the server name and connecting
var masterConnString = $#"Server={Server}; Database={ProjectCode}; Trusted_Connection=True;";
using (var connection = new SqlConnection(masterConnString))
{
connection.Open();
//do something
connection.Close();
}
The following error occurs:
System.Data.SqlClient.SqlException HResult=0x80131904 Message=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)
Source=.Net SqlClient Data Provider
Update:
When attempting to update the SQL Server Configuration Manager the connection fails due to lack of permissions.
Remove the trusted param and add this param
"Integrated Security=SSPI"
This always works with me when the server don't have any authentication
Using SSMS and Visual Studio 2015's Server Explorer tab under Data Connections, I can execute queries on remote server KOSH without issue. Why is the MVC application running locally in Visual Studio/IIS Express unable to do the same?
Using VS2015's connection Properties, I get its connection string:
Data Source=123.456.78.9;Persist Security Info=True;User ID=Foo;Password=Bar
Using that connection string, the MVC application is greeted with:
"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)"
Inner exception message:
"The network path was not found"
I know the server/firewall/network settings are correct. That leaves the application.
using(var connection = Database.Connection(conInfo.ConnectionString, provider)) {
// rowCountSql: SELECT SUM(rows) TM_ROWCOUNT FROM sys.partitions
// WHERE object_id = object_id(#tableName) and index_id IN (0,1)
// Any other SQL yields same error
var countTask = connection.QueryAsync(rowCountSql, new { tableName = Editor.TableName });
}
Async is used because the Oracle version of the query can take several seconds to return.
The application should be correct because it connects to the same server from home (also the server's location) and to identical databases in remote data centers running 2008R2 to 2014 without a problem.
Database.Connection() is:
// This is unlikely to be the problem as it is very well tested
public static DbConnection Connection(string connectionString, string databaseProvider) {
DbProviderFactory databaseFactory = DbProviderFactories.GetFactory(databaseProvider);
DbConnection connection = databaseFactory.CreateConnection();
if(connection != null)
connection.ConnectionString = connectionString;
return connection;
}
I bet I am missing something simple, but I would be grateful for help on what that could be.
As I said in comments, maybe the piece of your code:
conInfo.ConnectionString
does not contains the correct connection string you want.
Check it out
I got a error while i upload my application on server and it works fine at my localhost.
On server when doing any entry i got the following error.
Insert ErrorA 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).
and with same connection string i m using it on my localhost.
my connection string is look like
string connection = "Data Source=XXX.XXX.XXX.XXX; Initial Catalog=abcdefgh; Persist Security Info=True; User ID=ag_packers; Password=agpackers";
and when i used the same connection string in my local host it works fine and at server it gives the following error.
This could have different reasons, heres allready 2:
DataSource incorrect, if it's on the same machine try: ./SqlServerName
Your SqlServer service is not running, enable it at services.svc
Some points for you to check
Check whether your database server name/IP address is reachable from your web server by using ping dos command.
Check whether your target database is a Defaule SQL Server Instance or a Named instance. If it a named instance use this format for that.
Enable the named pipes/TCP IP for SQL server using server configuration manager.
Good luck.
We have a "legacy" application, which uses ODBC connections to an underlying database, which can be Access, Oracle or SQL Server. For unit (or, perhaps more properly, "integration") test purposes, I'd like to hook up a SQL Server 2012 LocalDB instance. However, I cannot figure out a correct ODBC connection string to use.
I have tried:
[TestMethod]
public void OdbcConnectionToLocalDb()
{
string connectionString = "DRIVER=SQL Server Native Client 11.0;Trusted_Connection=Yes;SERVER=(localdb)\v11.0;Description=LocalDB;";
using (OdbcConnection connection = new OdbcConnection(connectionString))
{
using (var command = new OdbcCommand("select * from Person", connection))
{
connection.Open();
// ...
}
}
}
However, when the connection is opened, the following exception is thrown:
System.Data.Odbc.OdbcException: ERROR [08001] [Microsoft][SQL Server Native Client 11.0]Named Pipes Provider: Could not open a connection to SQL Server [67].
ERROR [HYT00] [Microsoft][SQL Server Native Client 11.0]Login timeout expired
ERROR [08001] [Microsoft][SQL Server Native Client 11.0]A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online.
Is it possible to connect to a SQL Server 2012 LocalDB via an ODBC connection/driver? Is it possible to connect to a specific file?
[EDIT]
Garrett points out it is possible, great. I must have the connection string wrong, so my question really should be: what should the connection string be?
You need to specify your connection string like this:
Provider=SQLNCLI11.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=TestDB;Data Source=(localdb)\v11.0
The main thing I think is that you reference it as a data source rather than server.
Yes, it's possible. Make sure you install the latest driver: SQL Server Native Client "Denali" (for ODBC and OLE DB).
Look here for more info:
http://blogs.msdn.com/b/sqlexpress/archive/2011/07/12/introducing-localdb-a-better-sql-express.aspx
I'm getting this error since I've moved my mvc3/entity framework site onto the live server from localhost. Normally when I would get this error, I'd check the database name, password and server are all correct in the connection string. I have checked this - they all seem fine.
I have aspnet Membership provider on the site within the database, and it allows me to login, verifies me, then tries to redirect me to another page, and then that's where the error happens - i.e., as soon as I connect to the database outwith the membership provider.
The database is on the same server as the site, and when I connect from localhost to the remote server, it works perfectly.
Here is the full error message:
Exception message: 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)
Here is the connection string:
<add name="ApplicationServices" connectionString="Data Source=192.168.1.43;Initial Catalog=BlueLadder;User Id=BlueLadderAdmin;Password=Auth1991;timeout=30" />
Anyone anything I could try?
Ok, despite my connection string in the web config, it was actually being ignored and the application was still trying to connect to a local version. Apparently you need to pass the connection string through the dbContext constructor, like so.
public Context()
: base("ConnectionString")
{
}
Question was answered here
Thanks for your help anyway.
Try removing the Data Source and Initial Catalog, and replace them with something like this:
Server=.\SQLEXPRESS;Database=BlueLadder;
I don't know if you're using SQLEXPRESS, so just modify accordingly if you're not.
Check if your server is accepting remote connections and has TCP/IP provider enabled. You can configure this using "Sql Server Configuration Manager" on your server
You could try specifying the named instance of your server. "Sql Server Configuration Manager" can tell you what instances are installed on your server.
Server = 192.168.1.43/MSSQLSERVER or
Server = 192.168.1.43/SQLEXPRESS