On the form I have two Datetime picker control
DTPickerStartTime
DTPickerEndTime
But when user selects the date which is greater than enddate
error message fires many times
Private Sub DTPickerStartTime_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DTPickerStartTime.ValueChanged
If (DTPickerStartTime.Value > DTPickerEndTime.Value) Then
MsgBox("Start Date should always been less than or equal to end Date")
Exit Sub
End If
End Sub
Datetime picker date comparision
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Datetime picker date comparision
shaggydiggs
Does the event valuechanged, fires the error like a loop
Zarxrax
Olle Gustafsson
if you have a problem here then you should do something to end the problem, for example you could set the checkbox to unchecked.
The DateTimePicker has a property called ShowCheckbox, this will show a checkbox, as soon as you click (select a date) it will auto checkmark the box. So you would change your code like this.
Private Sub DTPickerStartTime_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DTPickerStartTime.ValueChanged
If (DTPickerStartTime.Value > DTPickerEndTime.Value) Then
if dtpickerstarttime.checked = true then
MsgBox("Start Date should always been less than or equal to end Date")
dtpickerstarttime.checked = false
Exit Sub
end if
End If
Personally I had to make a custom version so that I could handle nulls and set null dates, if the date is nothing (user wants to set date to null) then they would uncheck the checkbox. If they select a date then it auto checks and that gets saved. So this same method could work for your issue too.