Question

I am trying to read a table from a Wampserver using this, but I get an 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: Named Pipes Provider, error: 40 – Could not open a connection to SQL Server)”

When I ping localhost all the pings are received. Is this code correct?

    private void button5_Click(object sender, EventArgs e)
    {

        SqlConnection myConnection = new SqlConnection("user id=root;" +
                                   "password=pass;server=localhost;" +
                                   "database=database; " +
                                   "connection timeout=10");

        string query = "select * from table";

        SqlCommand cmd = new SqlCommand(query, myConnection);
        myConnection.Open(); // the error


        SqlDataAdapter da = new SqlDataAdapter(cmd);

        da.Fill(tabelsql);
        myConnection.Close();
        da.Dispose();
    }

Answer 1

SqlCommand and SqlDataAdapter are part of the MS SQL ADO.NET native client and can only be used for MS Sql Server. WAMP appears to include MySql. For that, you’ll likely want to use the MySql ADO.NET driver found here. And this article provides some sample code for reading MySql data utilizing a DataReader.