Overload resolution failed because no Public 'LCase' can be called with these arguments:
'Public Shared Function LCase(Value As Char) As Char':
Argument matching parameter 'Value' cannot convert from 'DBNull' to 'Char'.
'Public Shared Function LCase(Value As String) As String':
Argument matching parameter 'Value' cannot convert from 'DBNull' to 'String'.
Calcul de l'Itinéraire vers les ports de Sete Bejaia
