Custom DateTimePicker value not saved in application settings

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Hello everyone,

I want to save a Custom DateTimePicker.Value in my Application Settings.
The custom format is : dd/MM/yyyy hh:mm:ss, instead of dd/MM/yyyy
The field i've created in the application settings parameters is LASTSAVE (DATE / APPLICATION)

When I try to link in the ApplicationSettings/PropertyBinding ... VALUE with my field LASTSAVE, i have an error :

The Value '01/01/0001 00:00:00' is not valid for 'Value'. 'Value' must be ... 'MinDate' et 'MaxDate'.

Name of the parameter : Value

I then entered the MIN and MAX date in the properties of my control DATETIMEPICKER. I have also put into the properties Value a start date like 23/11/2011 12:00:00 ;

However, when i retry to link in the ApplicationSettings/PropertyBinding ... value to LASTSAVE / I have the same error (The Value '01/01/0001 00:00:00' is not valid for 'Value'. ). I've saved all, do a process that put a value in the datetimepicker.value, but it's not saved, cause not linked.

A solution please ?

Posted 23-Nov-11 22:29pm

contact97438

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Richard MacCutchan · Answer 1 · 2011-11-23T22:56:00

Solution 1

Don't save date and/or time values as strings; use System.DateTime[^] variables. In that way it will be valid for every system in the world; only when you need to display the value do you need to convert it to a readable string.

Posted 23-Nov-11 22:56pm

Richard MacCutchan

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contact97438 24-Nov-11 5:38am

Hello Richard,

I do not use a string value, but a datetimepicker, and a field "LastSave" which is a Date Type.

Private Sub TimerSauvegarde_Tick(sender As System.Object, e As System.EventArgs) Handles TimerSauvegarde.Tick
'Dim LastSave As DateTime = Convert.ToDateTime(My.Settings.DateDernièreSauvegarde)

Dim LastSave As DateTime
Dim NextSave As DateTime
LastSave = Nothing
NextSave = Nothing

LastSave = My.Settings.LastSave

'MsgBox(LastSave)

Dim Hour, Minute As Decimal
Hour = My.Settings.Heures
Minute = My.Settings.Minutes

Select Case ComboBoxA_Toutes.Text
Case "A" 'At a specific time of the day
NextSave = DateAdd(DateInterval.Hour, Hour, Today)
NextSave = DateAdd(DateInterval.Minute, Minute, NextSave)
'MsgBox("LastSave : " & LastSave & "Hour" & Hour & "Minute = " & Minute & "Next Save at : " & NextSave)
Case "Toutes les" 'Every Hours/Minutes specified by the user
NextSave = DateAdd(DateInterval.Hour, Hour, LastSave)
NextSave = DateAdd(DateInterval.Minute, Minute, NextSave)
'MsgBox("LastSave : " & LastSave & "Hour" & Hour & "Minute = " & Minute & "Next Save at : " & NextSave)
End Select

If NextSave <= Now Then
ButtonSauvegarder.PerformClick()
'MsgBox("Déclenche une sauvegarde automatique")
End If
End Sub