Visual Studio 2010安装程序

Question

Need some help I have a problem regarding my program using vb10 it was connected to MYSQL Server 2005 i created my final project as an installer when i install it in other computer there was an error. This is the error "A network or instance specific error occured while establishing a connection to SQL Server. The server was not found or was not accessible. Verify the instance name is correct and that SQL Server is configured to allow remote connection (provider: Named Pipes Provider error 40- could not pen a connection to SQL Server")?

i think i have an error in my connection to database this is the code that i used:

Dim con As SqlConnection = New SqlConnection("Data Source=localhost;Integrated Security=SSPI;" & _
"Initial Catalog=enrollment")

Answer 1

For simplification lets call your local PC computer A and the computer where you want to install computer B . Not sure if you use mySQL or SQL Server but my answer is acceptable for both.

What is happening?

Your connection string is telling your program to connect to your his local MySQL in deployed computer B (The part where says Data Source=localhost). As the computer B does not have a mySQL fails to make the connection (Error message Named Pipes Provider error 40- could not open a connection to SQL Server).

You have two solutions :

1. Change your connection string and put the IP of your local PC A . The problem is that B probably will have no access to A . Probably A is at your home and B at uni. Also you need to configure SQL/MySQL to accept remote connections.

2. Install a local SQL/MySQL in the computer B . Then install your DB there (easiest way is restoring a backup so you have tables, data and if you use, store procs, triggers, functions...)

Go for the second one :-)