I am currently working on a ASP.NET Framework project. I have just added authentication with Microsoft Identity based on Microsoft´s templates.
A local DB file is generated in App_Data with the authentication data. I changed the file to the C:/ disk to put the same file on the same location in the server.
My Web.config files has the following line for the connection:
<add name="DefaultConnection"
connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=C:\DB\aspnet-users.mdf;Initial Catalog=aspnet-users;Integrated Security=True"
providerName="System.Data.SqlClient" />
In my local machine, this works perfectly fine, all the functionalities. However, after the deployment on the server, I try to register unsuccessfully. I am getting the following errors:
[Win32Exception (0x80004005): The system cannot find the file specified]
[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: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.)]
The publishing method is "File System", this method does not support database publishing according to VS.
Thank you!
Related
Info
Project is ASP.NET Core 5.0, ORM is EF, DB is SQL Server
Problem
On Development, our database is accessible but on production its not!
Connection String
Is set in appsettings.json and its:
"MyConnectionString": "Data Source=MyDomain.com;Initial Catalog=MyDB;Persist Security Info=True;User ID=USERNAME;Password=PASSWORD"
When we run the project in Visual Studio with this connection string, everything is fine, but it fails when it's published to the host.
The error 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Any suggestions?
Thanks in advance.
Certainly not in the production environment.
Asha, did you enter the string connection in the appsetting file in the Development section? Or in the production section
I am trying to install an ASP.NET 5 Web application on IIS 7.5, and am running into a database connection issue. When running the application in the development environment the data source is set to (LocalDB)\v11.0, Which I believe is not correct. I get an error when browsing the web application on the remote server where IIS is located,
The system cannot find the file specified:
[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: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.)]
How do I form the connection string so that my application can reach the database to match models I created with the entity framework in Visual Studio 2013?
I think something like this would be suitable:
<add name="MyDB" connectionString="data source=ServerName; initial catalog=MyDB; attachddbfilename=|DataDirectory|\MyDB.mdf; integrated security=True;multipleactiveresultsets=True;application name=EntityFramework" providerName="System.Data.SqlClient" />
Judging by your error, it looks like you don't have a local database runtime installed.
If you are going to use SQL Server Express 2012, you will need to download and run the installer SqlLocalDB.MSI and use the connection string (LocalDB)\v11.0.
If you are going to use SQL Server Express 2014, you will need to download the 2014 installer SqlLocalDB.MSI and use the new connection string (LocalDB)\MSSQLLocalDB.
I'm working on one Windows forms application using one .mdf file. And I have Sql Server 2008 installed in my machine , it is working fine in my machine. Now I need to install this application in Client's machine, Client's machine don't have Sql Server if they try to access this getting Network related exception, ie,
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)
and this is my connection string in app.config file,
<add name="CustomConnection" connectionString="Integrated Security=True;MultipleActiveResultSets=True;Connect Timeout=120;User Instance=True;AttachDbFilename=C:\Users\[username]\AppData\Roaming\Smart\App_Data\SampleDB.mdf" providerName="System.Data.SqlClient" />
Can we access the .mdf file without Sql Server instance? If yes how can we set the ConnectionString value.
Thanks,
Abhishek
Trying to figure out the correct connection string for a SQL Server Express database. Trying to publish my app to IIS and test before publishing to my hosting site.
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)
I started here and also used connectionstrings.com. I also started reading the deploy asp.net app using SQL Server Compact article here
Using this connection string
Data Source=.\\SQLExpress;AttachDbFilename=H:\DB\Guestbook.sdf;Integrated Security=True
I get the above error
This connection string
<add name="DefaultConnection"
connectionString="Data Source=.\SQLEXPRESS;Integrated Security=SSPI; database=Guestbook; AttachDBFilename=|DataDirectory|Guestbook.sdf"
providerName="System.Data.SqlClient" />`
throws a trust level error. I've changed to medium and full and still get one of the two errors.
I've tried a variation of a few different strings with no luck.
Thanks
Please verify that SQL Service is started in services.msc and use the complete instance with the hostname ej: HOSTNAME\SQLEXPRESS
The file extension indicates that this is not a SQL Server Express database, so you must use:
Data Source=<Full path to file>
or
Data Source=|DataDirectory|Guestbook.sdf
I recently added a second site to my server. That site gives me the dreaded:
System.Data.SqlClient.SqlException: 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)
I have no idea why I am getting this. I've gone through this and this to no avail. This is a new MVC4 application I have at beta.vinformative.com in IIS 7. The other site is a MVC3 site at vinformative.com. It is running fine. Both of their databases have the exact same connection string and they are both on the same SQL server. I've given the same user mapping and role membership for NT Authority\Network Service to both databases.
Here is what I've tried so far:
MSSQLSERVER SQL Server service is running along with SQL Server Browser, and SQL Server Agent
I've added a firewall inbound rule for SQL Server browser
Made sure TCP/IP is enabled in sql server configuration
Added port 1433 TCP to the firewall
Enabled remote connection to db server
Successfully pinged the machine
Used portqry to see the db server on UDP 1434
I can connect to the site locally when I am remotely logged into my server. Furthermore, I have an ELMAH instance in the application for error logging and that is updating the database correctly. I feel like I am taking crazy pills because this should be working and I can't find an outright error. Please help!
Here is my connection string
<add name="vfContext" connectionString="Data Source=vinformative;Initial Catalog=vf3;Integrated Security=True" providerName="System.Data.SqlClient" />
Could be EF - see here.
Also, remote access cannot work with "Integrated Security=True" as far as I know, should use "User ID=******;Password=****;Integrated Security=False".