Android Question verify the correctness of the date

[Gianluca Esposito]

I use AnotherDataPicket.
How can I check if the date written by the user is correct?

Thanks

 

[DonManfred]

Something like

Sub ValidDate(ChkDate As String) As Boolean
    Dim old As String = DateTime.DeviceDefaultDateFormat
    DateTime.DateFormat = "dd.MM.yyyy" ' Please adapt to your needs!
    Dim dcf As Int = 0
    Dim GoodDate As String
    Try
        GoodDate = DateTime.DateParse(ChkDate)
    Catch
        GoodDate = ""
        dcf = 1
    End Try
    DateTime.DateFormat = old
    If dcf = 0 Then
        Return True
    Else
        Return False
    End If
End Sub

To use it like this:

    Log($"Valid Date: 19.03.2018 -> ${ValidDate("19.03.2018")} "$)

 

[Gianluca Esposito]

hi, If the date set is 31/02/2018, the AnotherDataPicket returns 3/02/2108 and then the date is correct

Private dpDataRiconsegna As AnotherDatePicker

DataPresuntaConsegna=DateTime.Date(dpDataRiconsegna.Date)
    
If ValidDate(DataPresuntaConsegna) Then

 

[lemonisdead]

In StringFunctions there is a method ValidDate
https://www.b4x.com/android/help/stringfunctions.html#stringfunctions_validdate