Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: The ConnectionString property has not been initialized.
the error is here: line 20
Line 18: cn.ConnectionString = connectionInfo
Line 19: If cn.State = ConnectionState.Closed Then
Line 20: cn.Open()
Line 21: End If
Line 22: Dim da As New SqlDataAdapter("select c_name from country order by c_name ", cn)
how can i solve this problem? thanks