I am using VS2005 ASP.NET 2.0.
I have a web application which uses Active Directory Connection.
The application is able to run smoothly on my local machine, including logging in.
However, when I brought my web application to my test server, I am not able to log in and it gave me an error which 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)
What is happening? Is it because the AD I am connecting to does not allow remote connection? I am able to log in when I am on my local machine though.
EDIT:
I am able to connect to the SQL server.
I inserted the following code on my login page_load and there's no error
SqlConnection thisConnection = new SqlConnection("Data Source=<IP>;Initial Catalog=<database>;User ID=<username>;Password=<password>");
SqlCommand nonqueryCommand = thisConnection.CreateCommand();
thisConnection.Open();
thisConnection.Close();
Thus the error is most likely caused by the AD connection string. Looking for suggestions or solutions.
A database connection string you are using is either incorrect or the database you are attempting to connect to is not accessible.
If you are defining your connection strings in the web.config file, ensure these are relevant for the test environment you have deployed to.
Related
I created a set up file and attached the database using SQL Server Express 2008,
but when I run the app, I get this error:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server cannot be found or cannot be accessed.
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 the specified server / instance)
I think it's the data source - is there anyway I can make my data source flexible?
Here is my data source :
SqlConnection cnx = new SqlConnection(#"Data Source=.\OSSAMA;Initial Catalog=assurance_stage;Persist Security Info=True;User ID=sa;Password=2041925");
you need to communicate SQL server with your local IP and port number 1433 or whatever port using and make sure your computer connected to the local network.
refer this issue How to connect to SQL Server from another computer?
There is a workaround to check if your Database is accessible on your target machine
Create a text file and change its extension to .udl and double click it, it would be something like
Put your credentials and test the connection, most of the times the DB is not accessible from the target machine, you may check if firewall is allowing the connection to DB
I'm new in azure cloud, so I have asp.net application. I want add ado.NET item. I try with connection string. Add connection there not run I add new connection there not run.
I don't understand. How add my entity framework classes to azure?
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: 40 - Error Could not open a connection a SQL Server ).
I new in asp.net too, so How I work with azure and asp.net?
You need to configure a firewall rule to enable you to connect to the database. You can do this from the portal.
How to configure firewall for database
I am working on a C# ASP.NET website that needs to connect to a database. I have all the connection strings set up and they work locally, but when I try to connect from the server I get an error that looks like this
[Win32Exception (0x80004005): Access is denied]
[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
The connection string:
<add name="Default" connectionString="Server=server;Database=database;User ID=user;Password=pass;" providerName="System.Data.SqlClient"/>
Would the app pool identity block the connection even when the username and password are supplied directly?
EDIT: There seems to be confusion about what my problem actually is. I can connect to the SQL server with the same connection string from my local ASP Development server just fine. The only issue is that I cannot connect to the SQL server from the production ASP server.
You connections pool is not the problem -- you have a basic connectivity issue
You may have a bad connection string -- everything must be typed correctly -- you did not supply your actual credentials -- presumably for good reasons, unless this is your actual connection string, in which case you need to fix it with your correct connection settings)
You may be port blocked by a firewall whether personal, corporate, ISP, etc.
The DB may not be accepting network connections
The DB server may not be running
McAfee A/V has been known to cause problem.
I'm sure I have overlooked a few possible problems.
i am developing a web application in visual studio 2012. and i have added a database file named as Database1.mdf into App_Data folder and i have given following connection string
Data Source=(LocalDB)\v11.0;AttachDbFilename="E:\asp.net mvc\storage\storage\App_Data\Database1.mdf";Integrated Security=True
after that i have written the code for inserting the data but at that i am getting the error like
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)
is there any mistake in the connection string?
Please help me in htis
Usually, for me, this indicates that SQL Server hasn't been configured correctly to receive remote calls. There are three things to check.
Your server instance is named correctly and you have permissions to it
That you are configured to receive remote connections
That SQL server is open on the the protocols you want to use
To check the second one, open up SQL Management Studio and select Properties on the server. Then check under "Connections" that "Remote Server Connections" is enabled.
To check the third, open up SQL Server Configuration Manager and make sure that "Client Protocols" TCP/IP is enabled as well as Named Pipes (depending on your network setup).
Your connection string should be written like this:
connectionString="DataSource=.\SQLEXPRESS; InitialCatalog=Database; AttachDBFilename=|DataDirectory|\Database.mdf; Integrated Security=SSPI;"
i have a snippet that it work properly when i use windowsmode with follow connection string
data source=.;database=xDB;integrated security=true;
but i have to change it for sql and windows mode i changeit to
Data Source=.;Initial Catalog=xDB;User Id=krs;Password=12345;
but follow error occur
Login failed for user 'krs'. The user is not associated with a trusted SQL Server connection.
and when change dot(.) to(local) another error occur
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)
plz help me im beginer n confused.thank
You have to enable the Named Pipe & TCP/IP in SQL Server configuration. Go through following link to enable that
http://www.triostechs.com/Microsoft-SQL-Server-2008/Microsoft-SQL-Server-2008-Enable-TCP/IP-or-Named-Pipes.html
Also Make sure, only one instance of the SQL Server running. If it is more than one, just verify which one you are connecting to.