Hi i’m trying to built a datagridview in .net using c# as frontend and sql server 2008 as backend..in the event of doing it i got a error that “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 tried all the solutions given above pls help me to fix it as early as possible…
my code as follows

private void Form1_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the ‘testDataSet1.Employee’ table. You can move, or remove it, as needed.
this.employeeTableAdapter.Fill(this.testDataSet1.Employee);
{
string strCon = “Data Source=dbServer;Initial Catalog=testDB;Integrated Security=True”;
string strSQL = “select * from Employee”;

SqlDataAdapter dataAdapter = new SqlDataAdapter(strSQL, strCon);
SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter);

// Populate a new data table and bind it to the BindingSource.
DataTable table = new DataTable();
table.Locale = System.Globalization.CultureInfo.InvariantCulture;
dataAdapter.Fill(table);
dbBindSource.DataSource = table;

// Resize the DataGridView columns to fit the newly loaded content.
dbGridView.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader);
// you can make it grid readonly.
dbGridView.ReadOnly = true;
// finally bind the data to the grid
dbGridView.DataSource = dbBindSource;
}

thanks in advance..:)

when u click on “Sql Server Configuration manager” , a window will open for u .In that window select “Sql Server Network Configuration”,there u will find “protocals or sqlserver”.click on it u will get list of protocals

thanks for your help.

Here’s what helped me get over this issue thanks to your pointers and those in this thread:

The SQL Server Configuration Manager already had TCP/IP and Named Pipes enabled on the node: SQL Native Client 10.0 Configuration. Despite this remote machine could not log on to the SQL server.

But Named Pipes and TCP/IP was disabled on the node: Protocols for MSSQLExpress

Enabling both on the second node and adding the default port 1433 to the TCP/IP tab helped establish the connection. The service requires a restart.

My SQL Browser service remains inactive and despite that remote terminals can connect.

The MS SQL Server Express 2008 was situated on an Windows XP machine and the terminals connecting to it were Vistas Utimate and Windows 7 Home Basic.

Ruchir

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) (.Net SqlClient Data Provider)

Application is configured with user id ‘sa’ having all rights.

when try to connect with a new login named ‘test’ it successfully access database but provides error that respective Procedure does not exists in database, this is due to because user ‘test’ is not dbowner, when assigning dbowner role and schema as dbo it again gives error : 40
specified above.

I checked all the settings as per specified in this thread.

Please help ….
Thanks in Advance.

Cannot connect to INFOSIGHT.

===================================

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) (.Net SqlClient Data Provider)

——————————
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476

——————————
Error Number: 2
Severity: 20
State: 0

——————————
Program Location:

I Guess during installation setup ask you select a server type whether
1. Developer machine (minimal amt. of memory)
2. Server Machine (medium memory Usage)
3.Dedicated MySql Server Machine (Utilize up to all available memory)

You can re configure this seting using MySql Server Instance Configuration Wizard.

Thanks and Tell if this info. is useful.

Regards

with sql 2000 its fine..when am running with sql-2005 am facing this error(Os-Vista,server=server/SQLEXPRESS)