asp.net - SQL Server was not found or was not accessible -

asp.net - SQL Server was not found or was not accessible -

what problem below?

a network-related or instance-specific error occurred while establishing connection sql server. server not found or not accessible. verify instance name right , sql server configured allow remote connections. (provider: named pipes provider, error: 40 - not open connection sql server)

description: unhandled exception occurred during execution of current web request. please review stack trace more info error , originated in code.

exception details: system.data.sqlclient.sqlexception: network-related or instance-specific error occurred while establishing connection sql server. server not found or not accessible. verify instance name right , sql server configured allow remote connections. (provider: named pipes provider, error: 40 - not open connection sql server)

how can solved?

all programs >> microsoft sql server 2008 >> configuration tools >> sql server configuration manager >> sql server services, , check if sql server service status “running”.

asp.net sql-server