Question

I will get data in DataTable. I am going to iterate data in foreach. I will have all types of data in Datatable. Now I need to find Double for each item (string) in DataTable. How to find IsDouble for string?

Ex:

I have "21342.2121" string. I need to covert this to Double. But sometimes the data will be "TextString". So I can’t use Double.Parse().

How to handle this?

Answer 1

This is the wrong approach, you’ll need to know up front what each column in the data table represents. Run this program to see what can go wrong:

Module Module1
    Sub Main()
        Dim value As Double
        If Double.TryParse("1e0", value) Then
            Console.WriteLine("Uh-oh")
        End If
        Console.ReadLine()
    End Sub
End Module