Find current date and previous year date

ASPxComboBox_currentYear are the values  below. If 2015 is selecteded, current_targetDate should be 1/5/2015 and
previous_targetDate should be 1/5/2014. If 2014 is selected current_targetDate should be 1/5/14 and previous_targetDate
should be 1/5/2013 and same pattern with other years. Not sure I am doing wrong here. in future, I am going to set ASPxComboBox_currentYear from db, instead of hard code it.

 <dx:ListEditItem Text="Select" Value="" Selected="true" />
                        <dx:ListEditItem Text="2015" Value="2015"/>
                        <dx:ListEditItem Text="2014" Value="2014"/>
                        <dx:ListEditItem Text="2013" Value="2013" />
                        <dx:ListEditItem Text="2012" Value="2012" />
                         <dx:ListEditItem Text="2011" Value="2011" />
                    </Items>
 </dx:ASPxComboBox>



  Dim current_targetDate As Date
  Dim previous_targetDate As Date


 Dim i As Integer = 0
        For i = 0 To numberOfYear
            If CInt(ASPxComboBox_currentYear.Value) = current_year - i Then
                current_targetDate = DateTime.Today.AddDays(i)
                previous_targetDate = DateTime.Today.AddYears(-1 - (1))
                Exit For

            End If
            i += 1
      
        Next

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