I built an application in C# for printing reports (management system)
which is running fine in my system. When I transferred it to my clients computer it gives error on printing invoice. I am using report viewer.
The program is running fine i-e data insertion,deletion etc in clients computer.
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 is configured to allow remote connections(provider named pipes
provider error 40- could not open a connection to SQL server)
I have tried
Named pipes/TCP is enabled
Remote connections are allowed
Windows Firewall is off
Created an exception for port 1433 in Windows Firewall
Enabled everything in SQL Server Configuration Manager
If you have enabled Tcp connection and tested all firewall setting for your sql sever then it could be problem with your connection string.Can you past the connection method what you are using on client machine..
You have to give ip address of server in data source with port number
1433.
like this:
Data Source=XXX.XXX.XXX.XXX,1433;Network Library=DBMSSOCN;Initial Catalog=dbName;User ID=yourUID;Password=pass;
Related
I am currently having an issue with connecting to my SQL Server Database.
My ConnectionString is as followed:
connectionString = #"Data Source=tcp:192.168.1.63;Initial Catalog=Database;User ID=User;Password=Password";
I am trying to connect to a local database with C#. Currently my Database is on the same PC as my C# code. I already tested the local connection and it works. But trying to connect it with TCP doesn't work.
I am getting the following 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.
I know I got the DB, ID and Password right. The IP is my IPv4 from IPConfig.
I want to test this program locally before sending it to another pc within my local network. This is why I don't use a local connection.
Does anyone know why I can't connect?
Edit:
I have already enabled the tcp/ip. (See picture)
There are two steps that must be done:
Change the configuration and enable the TCP/IP protocol in
the SQL Server Configuration Manager:
You need to restart the SQL
Server service so it reads the new settings.
I was wondering why I can't connect my application (C# Form from another pc) to my SQL Server?
I have followed these links, and use Virtual Box as my VM.
https://www.youtube.com/watch?v=aIovZluNmNs
How to connect to SQL Server from a C# program on another computer
Connecting to SQL server from another computer
Enable TCP/IP from the Configuration Manager
Use TCP Port 1433 (IPALL)
Restart SQL Server from the Configuration Manager
Added TCP Port from the Firewall (also UDP Port 1434, and SQLServer.exe), both server and VM
From my VM, I can ping my server ip (192.168.1.10)
But I still 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: TCP Provider, error: 0 - No such host is known.)
Connection strings that I have tried are:
Data Source=ip_address,1433; Initial Catalog=inventory; Integrated Security=True
Data Source=server_name,1433; Initial Catalog=inventory; Integrated Security=True
Data Source=ip_address,1433; Initial Catalog=inventory; Integrated Security=False
Data Source=server_name,1433; Initial Catalog=inventory; Integrated Security=False
First add a new user to login your credentials.
Your connection string should be look like this
Data Source=(server);Initial Catalog=(server);User ID=(username);Password=(password)
Next open your Windows Firewall with advanced security on your server.
Add new rule.
Select TCP and set on specific local port 1433.
Allow the connection.
and restart your server and try to connect again.
My application is throwing error from a client machine of not able to connect to the database. So as a test I use SQL Management Studio 2008 on that same client machine to try and connect to the database and I found out that if I use IP\InstanceName then I can connect but if I use ServerComputerName\InstanceName then I can't connect. I have verified the following:
The server has the same gateway and subnet mask as the client.
I can ping the server using either its IP address or its computer name.
No Firewall on either server or client machine.
Verify Server SQL browser service is running.
Verify Server is set to allow remote connection.
Verify Server TCP/IP is enabled via SQL SErver Configration Manager.
I can connect from a different client machine using ServerComputerName\InstanceName
Both server and client are using static IP setup with no DNS server under IPV4 properties.
Tracert from client to server shows only one hop, that is directly to the server machine IP.
I can remote access the client machine from the server machine or viceversa using host name.
I then go to the server machine and connect using LNKLAB8\Xmark (LNKLAB8 is the host name and Xmark is my instance name) and I connected successfully. However, when I run the command SELECT ##SERVERNAME, the result I got back is LNKLABARIAL8\XMARK
This baffled me, because if I right click on the database properties as per the screenshot below, it shows LNKLAB8/Xmark .. am I going crazy or something weird going on here? after taking at the steps I've taken, do you have any suggestion of how I can get the client machine to connect to the database using the server host name instead of the server IP address?
I've kind of hit the wall on this issue, I'm unsure if I am facing a network related issue or it is a database setting issue.
Edit: When I tried to connect using host name to the server DB I would get the following:
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)
Try add servers IP and Name to c:\WINDOWS\system32\drivers\etc\hosts
1) Make sure you've enabled TCP/IP (Configuration manager), and restarted MSSQL
<= it sounds like you've done this.
2) Make sure you can "ping" by hostname and by IP
<= It sounds like you've done this, too
3) Make sure MSSQL Browser is running
4) If you're using Windows authentication (vs. SQL Mixed), then make sure you can authenticate to the remote server:
net use \\remote-server /user:<name> <password>
5) Failing all else, you might want to consider reinstalling MSSQL-related components on either/both client or server (for example, MDAC)
Links:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/4d2ce34a-508f-4a1d-8828-8806ccc12f77/sql-server-2005-cant-connect-remotely-using-host-name?forum=sqlsetupandupgrade
http://blogs.msdn.com/b/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx
https://serverfault.com/questions/384700/error-connection-to-sql-server-using-hostname-instance-or-fqdn-instance-ip
'Hope that helps!
I noticed this:
8: Both server and client are using static IP setup with no DNS server under IPV4 properties.
How is name resolution happening, then? WINS? NetBIOS? Sql Server may not like that. Try checking that you have a working DNS server with the appropriate entry for your Sql Server system, and things may work better.
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 share two computer with local network
computer1 : Windows XP, ip = 192.168.0.1
computer2 : Windows 7 , ip = 192.168.0.2
Now I want to connect to a SQL Server 2005 database that exists on computer1 from copmuter 2 with a win app
I use below connection string and check Surface Area Configuration for Services and Connections but I get 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.SQL Network
Interfaces, error: 26 - Error Locating Server/Instance Specified
Connection string:
Data Source=192.168.0.1;Initial Catalog=DBName;Integrated Security=True
and
Data Source=192.168.0.1;Initial Catalog=DBName;Integrated Security=false
As your error message says, it could be a network-related error.
Does your server really have the IP 192.168.0.1?
Does it accept incoming connections?
Do you run a firewall such as the windows firewall that blocks incoming connections?
It could also be that you have not configured your sql server to accept remote connections, but only connections from localhost.
Data Source=192.168.0.1;Initial Catalog=DBName;Integrated Security=false
Here you must specify the Uid= your usernam**e and **Password=password.
Because you are making integrated security= false
As dontomaso pointed out, check that "Allow Remote connections" option is enabled on the server. If i recall, its disabled by default.
(cant post images directly yet, heres the link)
Allow Remote connections option screenshot
If you connect from another machine you check the configuration:
SQL service account: NetworkService
Ensure SQL server running the SQL Browser service
In the Protocols:
Named pipes: set Enableb (to connect the computer to install SQL user name)
TCP / IP: Enableb set (to connect using the IP address of the machine IP_dia LAN)
-> 2 This section Enableb all, they want to use way also.
Shared Momory: DISABLED choose, if this part is ENABLEB can not connect via LAN or Internet.
(string strCon = "Data Source=192.168.0.1,1433;Initial Catalog=DatabaseName;User ID=sa;Password=sa";)
To connect via the Internet you here take your network IP address on the Internet.