Question

I’ve read that in PHP non-persistent open links are automatically closed at the end of the script’s execution. So what’s up with asp.net?

Answer 1

Yes you need to close open connections to database. ADO.NET has a connection pool, and open connections are reserved to you while it stays opened. When you close it, it will be available to other connection requests.

But if you’re using DataAdapter, and you don’t open connection manually, you don’t need to close it. DataAdapter manages it and closes it’s own connection :

SqlConnection nwindConn = new SqlConnection('Data Source=localhost;Integrated Security=SSPI;Initial Catalog=northwind');  SqlCommand selectCMD = new SqlCommand('SELECT CustomerID, CompanyName FROM Customers', nwindConn); selectCMD.CommandTimeout = 30;  SqlDataAdapter custDA = new SqlDataAdapter(); custDA.SelectCommand = selectCMD;  DataSet custDS = new DataSet(); custDA.Fill(custDS, 'Customers');