[RESOLVED] Cast from String to type double is not valid

[cicatrix]

Use
Double.TryParse method.

' this will cast string to double:
Dim str As String = "3.14"
Dim d As Double = 0

If Not Double.TryParse(str, d) Then
   ' The string is in invalid format
End If

[sauce1979]

HI i am relatively new to VB.NET. I have tried to add TryParse to my code but get an error saying that:

Argument not specified for parameter 'result' pf [ublic Shared Function TryParse

my amended code is:

Dim dValidType As Integer
Dim d As Double = 0

If Double.TryParse(OrderTotal, d) And OrderTotal >= dMinOrderTotal And OrderTotal <= dMaxOrderTotal Then
            dValidType = 0
ElseIf Double.TryParse(OrderTotal, d) And (OrderTotal < dMinOrderTotal Or OrderTotal > dMaxOrderTotal) Then
         dValidType = 2
Else
         dValidType = 1

End If
Return dValidType