I have a problem with interbase database and sqldependency c#. I want to detect changes in database.
When I run code:
public Form1()
{
InitializeComponent();
DbConnection c = new TAdoDbxInterBaseConnection();
c.ConnectionString = #"Database=C:\MeronaSoft\MSDB.gdb;User=SYSDBA;Password=masterkey";
SqlDependency.Start(c.ConnectionString);
}
I get:
An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll
Additional 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.
Maybe it is not possible to us interbase with sqldependency?
check these things
Make sure your database engine is configured to accept remote connections(I you are using centralized database)
•Start > All Programs > SQL Server 2005 > Configuration Tools > SQL Server Surface Area Configuration
•Click on Surface Area Configuration for Services and Connections
•Select the instance that is having a problem > Database Engine > Remote Connections
•Enable local and remote connections
•Restart instance
Check the SQL Server service account
•If you are not using a domain account as a service account (for example if you are using NETWORK SERVICE), you may want to switch this first before proceeding
3.If you are using a named SQL Server instance, make sure you are using that instance name in your connection strings in your ASweb P.NET application
•Usually the format needed to specify the database server is machinename\instancename
•Check your connection string as well
Check this link A network-related or instance-specific error
Other wise go Control Panel\All Control Panel Items\Administrative Tools\services and start SQL SERVER(SQLEXPRESS).
Related
I am trying to create a new SQL DB in Visual Studio 2010, and Upon entering a Server Name and a DB name then pressing Ok, I get this 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Any ideas?
Just go through this article.I think you can solve the problem.
http://blog.sqlauthority.com/2009/05/21/sql-server-fix-error-provider-named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server-microsoft-sql-server-error/
Also ensure you have specified servername and database name correctly in connection string.just take connection string from property window of added database.
Try this article, it goes through pretty much all the steps you will need to troubleshoot your connectivity problems:
http://social.technet.microsoft.com/wiki/contents/articles/2102.how-to-troubleshoot-connecting-to-the-sql-server-database-engine.aspx
I write web page in MVC, which use Entity Framework as ORM mapper. I put my connection string to web.config file. Here is it:
<add name="JP_CMS" connectionString="Data Source=.;Initial Catalog=JP_CMS;
User Id=CmsWebUser;Password=abcd1234abcd1234;"
providerName="System.Data.SqlClient"/>
I try to get data by this C# code
public DataBaseContext()
: base("JP_CMS")
{
Database.SetInitializer(new DropCreateDatabaseIfModelChanges<DataBaseContext>());
}
//------------------------------
var db = new DataBaseContext();
var result = db.Articles.ToList(); //<- here is thrown exception
//------------------------------
My local SQL server is running, this table is exists, but I get excepion like in this:
I think it is the most important expection: "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)"
Could you help my by give some idea what I make wrong?
"The system cannot find the file specified" error. Check carefully your connection string.
hi Error indicates EF tried to connect to the server but failed.
Could you Checkk,
1) SQL Server should be up and running.
Go to All Programs >> Microsoft SQL Server 2008 >> Configuration Tools >> SQL Server Configuration Manager >> SQL Server Services, and check if SQL Server service status is “Running”.
In addition, ensure that your remote server is in the same network. Run “sqlcmd -L” in your command prompt to ascertain if your server is included in your network list.
2) Enable TCP/IP in SQL Server Configuration
For more info you can go here
Instead of DataSource =. try DataSource = .\sqlInstanceName. Also DataSource=(local) might work.
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.
I have a web application that needs to connect to databases hosted by a client. A VPN is configured between my company and the client. All ports have been opened. Connection via SQL Server Management Studio works fine. We just need to specify the domain name in the current database (eg MYSERVER.mydomain).
In contrast, the connection is not made when a developer tries to run the application in debug mode.
Connection strings are of the type: connectionString = "Data Source = <SERVERNAME> \ <instance name>; Initial Catalog = <BaseName>; User ID = [login] Password = [password]"
The connection does not seem to success and the following exception is thrown:
{"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 que le instance name is correct and SQL Server is configured That to allow remote connections. (Provider : SQL Network Interfaces, error: 26 - Error Locating Server / Instance Specified) "}
We tried the following changes:
- Disable the Firewall Client
- Modify the connectionStrings with: Persist Security Info = True
- Modify the connectionStrings with: Connect Timeout = 120;
Has someone already encountered this problem? At this point, any idea could be great ...
Thanks a lot
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