Preserving NULL values in a Double Variable

Question

I\'m working on a vb.net application which imports from an Excel spreadsheet.

If rdr.HasRows Then
        Do While rdr.Read()
            If rdr.GetValue(0).         


        

Answer 1

I don't know which API you're using to do database inserts, but with many of them, including ADO.NET, the proper way to insert nulls is to use DBNull.Value. So my recommendation is that you use Nullable(Of Double) in your VB code, but then when it comes time to do the insert, you'd substitute any null values with DBNull.Value.