Date time validation in vb.net

Question

Can anyone help me on how can I validate given DateTime between two DateTime using vb.net?

the given DateTime must not in between the two DateTime..

Answer 1

Use DateTime.Compare

Dim date1 As New DateTime(100)
Dim date2 As New DateTime(200)
Dim workingDate As New DateTime(150)    

If DateTime.Compare(workingDate , date1) >= 0 AND DateTime.Compare(workingDate , date2) <= 0 Then
    Console.WriteLine("Between")
Else
    Console.WriteLine("Not Between")
End If

Answer 2

You can compare date instances the same way you would compare numbers as they override the LessThan, LessThanOrEqual, GreaterThan and GreaterThanOrEqual operators:

Dim minDate = New DateTime(2009, 4, 17)
Dim maxDate = New DateTime(2011, 4, 17)
Dim selectedDate = New DateTime(2010, 4, 17)

If selectedDate > minDate And selectedDate < maxDate Then
    Console.WriteLine("selected date is valid")
Else
    Console.WriteLine("selected date is invalid")
End If

Answer 3

Dim dt As Date = DateTimePicker1.Value.Date
If dt < CDate("2010-04-01") Or dt > CDate("2010-04-10") Then
    MessageBox.Show("Date is not in the first 10 days of April so is ok")
End If