I've developed a .NET (windows forms application) that i want to distribute to a friend which is not a developer. When my friend opens the generated .exe file as administrator on her computer, this error comes up.
"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 instance name is correct and that SQL
Server id configured to allow remote connections. (Provider: SQL
Network Interfaces, error: 52 - Unable to locate a Local Database
Runtime installation. Verify that SQL Express is properly installed
and that the local Database Runtime feature is enabled.)"
From the error it seems like the application crashed because the database is not installed on my friends computer. This leaves me behind with the following questions.
1) How would someone distribute a .NET application using a service-based database?
2) Should I make an installation file (visual studio 2019) that also installs the database and eventually the .NET framework. If yes, how should I do that in visual studio 2019?
3) From the word service-based database it seems like this database is running on some server somewhere? Is this server my own computer? Or can I access this server from another computer?
Related
For the life of me I am unable to connect to my localdb hosted database created in Visual Studio 2015 to my local IIS 7 instance running on the same machine. IIS Express works fine but when I wanted to test things as a user outside of my network I dabbled with a Local copy of IIS.
I have tried everything from ensuring the app pools have the right privileges, that my connection strings are accurate and just about every thing else I have found on the web but I cannot for the life of me get this working.
The error I am getting is the following: 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 get a local application data path. Most probably a user profile is not loaded. If LocalDB is executed under IIS, make sure that profile loading is enabled for the current user.
)
Connection String in VS2015:
Any other details needed to help troubleshoot ask and I will provide.
Thank you in advance for reading.
My objective was to make a database for general store. Information was very scattered about how to create database and why in that way. So i selected SQL Server Express.
Application was made in C# Visual Stduio 2012. Database was created with SQL management Studio. To connect the application with database i used serverexplorer in visual studio and assigned ./sqlexpress
Now the problem is that database works fine on my pc but when i deploy application on the clients pc it says
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)
Connection String Used connectionString = "Data Source=.\\SQLEXPRESS;Initial Catalog=pos;Integrated Security=True";
Where i went wrong ? Is database also deployed with published app or i have to do some other steps ? Will i have to install SQL server on client pc too?
Note: The application is local. i don't need to transfer data via internet.
Let me know according to your experince what is the right way to attach,create and deploy database the right way for this small project because internet is full of guide but there is no where mentioned properly why the specific method is adopted etc
I solved the issue by download sql server management studio on client pc. I just made a backup of database form my management studio and restored that backup file from clients management studio. And now everything is working
I'm following [this tutorial], I'm trying to create EF database in C# console application, but (even if I do exactly everything as in tutorial) it fails on
db.Blogs.Add(blog);
db.SaveChanges();
lines. Error:
An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in EntityFramework.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 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.)
As author of tutorial says, it shouldn't require me to do anything to configure my DB, but it seems like it does.
What should I do to make it work?
Software that I use:
Visual Studio 2015, EntityFramework 6.1.3.
In Visual Studio 2015 the built in SQL database the comes with it is mssqllocaldb and not SQL Express.
This can be accessed with:
(localdb)\MSSQLLocalDB
rather than
.\sqlexpress
In the tutorial under the section after "You can connect to this database using Server Explorer in Visual Studio" follow the instructions to connect to a database and replace .\sqlexpress with (localdb)\MSSQLocalDB if you can connect this database then change your connection string in your application.
The solution that worked for me is:
Open Visual Studio installer (*.exe file used to install Visual Studio)
Click on "Modify" button
Find "Microsoft SQL Server Data Tools" and check it
Click "Update"
Now your database should work.
I have developed an inventory system in C# ,database used is SQL server .Now my problem is how to deploy my project with database and run it on client's machine i have 1 more week remaining in delivering this project .I tried many blogs and sites but all in vain and i did not get any good resource which clearify me all this scenerio.The current publishing process does not have a database file and showing me 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
Please any suggestions would be highly appreciable?
I am using Visual Studio 2013 and SQL Server 2012!
By default, SQL Server have network access disabled after a fresh install. You need to use the SQL Configuration Manager to allow remote connections to the instance.
See this post:
http://blogs.msdn.com/b/walzenbach/archive/2010/04/14/how-to-enable-remote-connections-in-sql-server-2008.aspx
http://www.romankagan.com/?p=118
If after this you still can't connect, verify that SQL Server ports are not been blocked by the machine firewall.
I was making minor modifications to a view in my ASP.NET MVC 3 C# application when all of a sudden the application would no longer run. The error message is as follows:
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: Shared Memory Provider, error: 40 - Could not open a connection to SQL Server)
Upon close inspection of the server explorer I noticed that all database connections are no longer working. I cannot expand any of the connections to view the tables and data I previously generated within. When I attempt to, there is a pop-up window that is generated that repeats the exact same error as above.
It is important to note that I was not making any modifications to any portion of the application that pertains to a database. I was rearranging some of the visual components of a view in my application when all of this occurred. I had just recently restarted my computer and had made no other modifications since that time.
At first I thought that somehow SQL Express had overwritten my development environments version of SQL Server and began to reinstall SQL Server Express. The installation fails every time now. There is no specific error. Windows generates an error message saying that the setup application "stopped working" and hangs until closed.
I have tried several different versions of the SQL Server Express installation package, and they all result in the same error happening at different points in the installation process. To be clear, I'm not even sure SQL Server Express is the problem. I don't know why it would be since I'm using the SQL Server edition that is built into Visual Studio 2010.
Is the SQL service running? Check under SQL Server Configuration Manager.
Yes, another life saved.
Run-sqlservermanager11.msc, right click and start.
Is the SQL service running? Check under the SQL Server Configuration Manager.
I assume you've already tried to repair install, to uninstall and to restart your computer, pray then try again?
Are you databases remotely deployed? Because it is possible that the network is down.
Secondly, check in the we.config file if you have specified the correct credentials. Try to log in through SQL Server Management Studio.
One more thing: Stop the SQL Server service, and start it again. Or you can reboot the system.