I am attempting to debug an application, but when I run it I get the following error message:
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've opened up the 1433 port and double-checked it's open and reachable from my current location. I've also enabled TCP/IP remote connections and can connect remotely using SQL Server Studio Manager.
The connection string I'm using is:
Data Source=xx.xx.xxx.xx, 1433;Network Library=DBMSSOCN;Initial Catalog=KnightOwl-Demo;Persist Security Info=True;User ID=KnightOwlGentleshaw; Password=xxxxxx
I'm 90%sure there's something wrong with the connection string but I'm not sure what?
If you are not sure about the Connection string, use a udl file for testing:
Create a new text file.
Change the extension to .udl (e.g. 1.txt to 1.udl)
Go to the Connection tab
Insert your credentials (Servername\instance , user name + password / Windows security etc)
Check the Allow saving password check box
Click on Test Connection and get a success message.
Click on OK (this will close the form)
Open the 1.udl file in a text editor - It will contain the connection string that was used for the successful connection
Now you can compare the connection strings / use the one you now that works...
Good luck!
Try this code
Data Source=xx.xx.xxx.xx;Initial Catalog=KnightOwl-Demo;Persist Security Info=True;
Related
When I set up my VB.net program to read from a local MDF database file (SQL), it tells me that I need remote connections. Details follow:
I have a Visual Studio vb.net application. It needs a database, so I downloaded SQL Express and ran a script to add my database. This worked fine. Then I wanted to send my program to a colleague, and I thought I should copy the database MDF and LDF files to the App_Data folder of the program, and then use a connection string that can read the MDF.
The connection string seems to be OK:
Server=.\SQLExpress;AttachDbFilename=C:\gideonwroteprograms\EchoTheory\Echo
Theory\bin\Debug\App_Data\EchoDatabase.mdf;Database=EchoDatabase;Trusted_Co
nnection=Yes;
but I get a message saying I now need to allow remote connections (which I regard as a security risk).
The message is:
System.Data.SqlClient.SqlException
HResult=0x80131904
Message=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)
Source=.Net SqlClient Data Provider
I've installed tigertoolbox from Microsoft and I'm using SQL Server Performance Dashboard Report daily.
It's very useful and I suggest you to install it if you are not using it yet.
BTW, when I connect to localhost everything works smoothly but when I'm trying to connect to another SQL Server instance on the network I receive the error
An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'DataSource1'. (rsErrorOpeningConnection)
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)
Access is denied
The answer is very easy: I can easily connect to localhost thanks to my credentials but I need to enter user/password for a remote SQL Server instance.
How can I ask to SSRS to prompt user and password for remote SQL Server instance?
The problem Cannot create a connection to data source ‘DataSource1’. (rsErrorOpeningConnection) is even mentioned in the comments on the official Microsoft page but it's not mentioned how to fix this issue.
Check if you are running the SSRS on the default port of Server. If not, inform the port in the connection.
The answer is very easy: I can easily connect to localhost thanks to
my credentials but I need to enter user/password for a remote SQL
Server instance
That is NOT the answer.
The error tells you that your server was not found, so it cannot be authentication error, the server is not reached so it just cannot authenticate you.
You should check your connection string if it's right. if it's correct, it can be firewall or your server is not configured to accept remote connections.
So for whe first thing post here your connection string, it looks like this:
My picture is for shared DSN, if you use it embedded you can find it in your report properties
Here's my connection string...
Data Source=MYMACHINE\SERVER2000; Initial Catalog=MyDatabase; User Id=sa; Password=p;
Here's the 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)
I can connect fine with Enterprise Manager. Also I have upgraded the SQL Server to Serivce Pack 4.
Any ideas what the issue might be?
I'd suggest testing your connection string using a .UDL file. I've answered a similar question here. After creating your connection, you can rename the extension of the file to .txt, open it and then copy and paste the working connection string in.
string connectionString=#"Data Source=MYMACHINE\SERVER2000; Initial Catalog=MyDatabase; User Id=sa; Password=p;";
SqlConnection connection=new SqlConnection(connectionString);
SqlCommand command = new SqlCommand("Select * From Table",connection);
SqlDataReader reader= command.ExecuteReader();
GridView1.DataSource=reader;
GridView1.DataBind();
Use this.... this may help you?
I am trying to access SQL DB that is located on my computer from an application that is located on a server (has IIS7).
I set the ConnectionString in the WebConfig with the IP of my computer and I always get 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. (provider: Named
Pipes Provider, error: 40 - Could not open a connection to SQL Server)
I wanted to enable remote connections as it was mentioned in the error. These are the things that I tried in order to make it work:
Made sure that "Allow remote connections" to this server is checked in the properties window of my server
Enabled TCP/IP in the SQL Server Configuration Manager
Right clicking on the TCP/IP and in "Properties" set the port to 1433 and removed the "0" in the Dynamic Ports
Created a new rule in the Windows Firewall to allow the connection from port 1433
Added sqlservr.exe from the MSSQL/Binn folder to "Allow a program through Windows Firewall"
Restarted the service
None of it helped. What else can I do?
EDIT:
Connection string:
<connectionStrings>
<add name="someName" connectionString="Database=someDB;Server=<my computer's IP>;User=userName;Password=123" providerName="System.Data.SqlClient"/>
</connectionStrings>
I am showing SQL Express setting this should be same in standard and other versions.
check this and follow the first link for connection specification and testing for this problem.
Check these links for checking error exists regarding this particular topic and fixing this:
Resolving “A network-related or instance-specific error"
SQLAuthority- could not open connection
I just fixed my computer here and there after I was facing some BSOD's and when I now try to open up SQL Server using Windows Authentication, displays the following message and doesn't login.
TITLE: Connect to Server
Cannot connect to SARIN-PC\SQLEXPRESS.
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: 26 - Error Locating
Server/Instance Specified) (Microsoft
SQL Server, Error: -1)
I checked in the Configuration Manager, Named Pipes, Shared Memory and TCP/IP all are enabled. What went wrong now? :-|
Did you check SQL Server Configuration Manager->SQL Service(MSSQL). Is it runnig?
You also can check:
SQL Service(MSSQL)->Properties->Service->Host Name is eqals to "Service Name"
which you must enter when you start your MSSQL Manadgment Studio.
If it don`t help you can read this articlea http://blogs.msdn.com/b/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx
Check if you are typing in the right computer name and instance name. The error basically points to that.