I'm trying to use POCO to connect to my database.
Whenever I try to connect, I get this error:
Failed to load provider "System.Data.SqlClient".
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)
NOTE: it's a local database, and remote access is enabled, TCP/IP is enabled, and the SQL Server service is running.
I'm using .NET Core 7
Can anyone tell me how to solve this?
Thank you all
Related
I get this error:
Microsoft.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: SNI_PN11, error: 56 - Unable to load the SQLUserInstance.dll from the location specified in the registry. Verify that the Local Database Runtime feature of SQL Server Express is properly installed.)
I verified that SQLUserInstance for SQL Server 2016 Express and 2019 are signed with Microsoft Publisher certificate (1.3.6.1.4.311.76.8.1)
While I'm connecting visual studio 2010 to sql sever 2008, I'm getting an 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)
You are able to connect to your sql server through SSMS ?
If yes then it might be issue with your connection string and else it seems to be issue with credentials or network availability.
More details will be needed in that case.
You can get help in generating connection strings using ".udl" files.
Anyone have an idea how to solve this problem?
A network-related or instance-specific error occured while establishing a connection to SQL Server. The server was not found or was not accessible.
Verify taht the instance name is correct and that SQL Server is configured to allow remote connection. (provider: SQL Network Interfaces, error: 26 - Error locating Server/Instance specified)
Thanks in advance!
Make sure the instance of the server is started. Do this from Start Menu-> Microsoft SQL Server... ->Configuration Tools->SQL Server Configuration Manager->SQL Server Services
If it is not on your local machine, i.e. on a remote server, then your account needs a login on the SQL Server that is granted access to the DB you are trying to connect to.
Usually the local server instance by default is installed with access for yourself. But it doesn't hurt to check.
Also if it is remote, can others connect successfully? If not, then you may also need remote connections enabled on SQL Server.
Making sure you have the name of the instance correct is important. Slashes should be back slashes, not forward slashes. What are you using for the instance name?
been trying to configure an ADO.NET connection for my Visual Studio application but I am running into issues and having no luck at all troubleshooting them. The major error that I run into is:
A network-related or instance-specific error occurred while establishing a connection to SQL server. The server was not found or not accessible. Verify the instance name is correct and that SQL server is configured to allow remote connections (Error 40: Could not open connection to the SQL server)
The steps I undertook to troubleshoot this are:
1. Open up Sql server configuration manager and under the SQL Server Network Configuration, Protocols for MSSQLSERVER,SQLExpress, SQL server 2008 connection string data source I enable each of the protocol names (Shared memory, Named pipes,TCP/IP,VIA)
As instructed I stop the SQL server services first under the SQL server services nodes.
Now I click start, MSSQL server service starts but both SQL Server 2008 and SQLEXPRESS agents do not. Stating the following:
The request failed or the service did not respond in a timely fashion. Consult the event log or other applicable error logs for details
This might just be the problem as when I attempt to create the connection string , the server name specified is MYWORLD/SQL SERVER 2008. Since the SQL server 2008 agent service refuses to start, the connection fails, leading to the first error message.
Does anybody have any leads on this and can let me know the necessary steps to mitigate this.
The SQL Browser service must be running to connect to a named instance.
Use SQL Servr Configuration Manager under Configuration Tools under Microsot SQL Server 2008 to assign the logon accounts for each service you want to run. Do NOT use any other method to assign user accounts because the correct rights will not be enabled.
I have a web-application which is reciving the following while trying to connect to a database hosted on another server.
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)
Now, there problem here is that the connection strings, and the server paths area all perfect.
The site run correctly when run via cassini, on my local machine. (Connections strings are correct.)
Other sites hosted on the same server are able to access the databse. (Server paths ara all active.)
While the error says it's been unable to connect, Activity Monitor is aware of the query, and the Server Logs show no error. (Just odd.)
Google & Bing have massively failed with this, so I guess it's time to hit the Stack!
Open the Sql Server Conifguration Manager, expand Sql Server 2005 Network Configuration, click Protocols for <Yourserverinstance>, then check TCP/IP is enabled.