The error occurs when I create a fresh new ASP.NET MVC web application project. After running it, clicking on Register, filling in my e-mail and password and clicking the Register button - bam exception:
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.
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Seems like there's some problem creating the database. Weird thing is, this doesn't work on my laptop, but it does on my desktop computer. Ideas?
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I have a ASP NET MVC web application and in the solution I'm running two apps that are connected to the same database. Both are published on Azure and I also have a Azure SQL Server and database connected. The first app is running fine with fetching data and login etc. The second app however runs but when I need data from the database it gives the following error:
I found a solution on StackOverflow to add ASPNETCORE_ENVIRONMENT with value Development to get a better understanding of the error. Now when I run the specific view in the app this error pops up:
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: 26 - Error Locating Server/Instance Specified)
I can't seem to find a solution for this. Both apps have the same connection string to Azure and the first app runs fine. Hope somebody can help!
We have 4 servers, three of which are the main servers that contain SQL Server databases, and we are going to the mobile app on server 4 so that our users can connect to their database on their phones. Server 4 has an intermediary role, but now the problem we have is that we can not register data through Server 4 and it gives an error. I checked the firewall and SQL Server security settings, but this problem still persists and 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: 26 - Error Locating Server / Instance Specified)
I also checked the remote connection settings and it is active
Please check whether you can you ping other servers from server 4 to ensure there is no net work level problem. Then you need to allow remote connection in all those servers.
Below link might be able to give you more clarity on this issue:
Why am I getting "Cannot Connect to Server - A network-related or instance-specific error"?
I'm currently working on a .NET Core project. When I run the application on my local machine (Windows) I can connect to a SQL Server database using my windows credentials.
I am attempting to shift into using a devcontainer within Visual Studio Code, but when I run the same application in the container (Linux) I get an error:
An exception of type 'Microsoft.Data.SqlClient.SqlException' occurred
in Microsoft.Data.SqlClient.dll but was not handled in user code:
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: TCP
Provider, error: 35 - An internal exception was caught)
I'm not sure where to go from here. What did I miss?
I am trying to build a project data base SQL in my web application project (visual studio) I tried to off the firewall and I got this:
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.
If you are using SQL Server, then do the following:
Search for "Services" in Cortona
Open the "Services" app
Scroll down to "SQL Server(MSSQLSEERVER)"
Now go to its properties and start the service
Also, make sure you are using the correct connection string.
This error was returned when I tried to connect with server.
Error description 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. (provider: SQL
Network Interfaces, error: 26 - Error Locating Server/Instance
Specified) (Microsoft SQL Server, Error: -1)
First you need to check whether SQL SERVER service is running in your system or not .For checking follows below steps in Windows.
Step 1 : Type "window" button + R ,This will open Run prompt.
Step 2: Type "services.msc" in Run prompt and hit the enter.
Step 3: Find SQL SERVER service from there.
Step 4.Start this service.
Following these steps, I have resolved this problem in my machine.
Thanks
Check your SQL Server Service is Running or not
if the server is in remote location check port 1433 is not blocked by the firewall.
if this is not the default instance, Check SQL Server Browser is running or not
Check the network connection on client PC, and verify the connection to the server using PING or TELNET
Check whether TCP/IP and Named Pipes are enabled or not.
for more details Why am I getting "Cannot Connect to Server - A network-related or instance-specific error"?
To solve 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 Go to Sql Server Configuration Manager>>Sql Server Services Sql Server>>Right click on the Sql Server(MSSQLSERVER) and Start the Process.As show belowenter image description here
If you are trying to connect to your Sql Server running on MacOS via Docker, then make sure that Sql Docker container is running and then you will be able to connect to your Sql Server using Azure Data Studio as shown in attached image Sql Container inside Docker