DEVEXPRESS ASPxGridView PropertiesComboBox DataSource On CodeBehind

<dx:ASPxGridView ID="GridViewTRY" runat="server"  DataSourceID="SDSGridViewTRY" KeyFieldName="ID" OnInit="GridViewTRY_Init">
        <Columns>                                  
              <dx:GridViewDataComboBoxColumn FieldName="PersonalFK" Caption="Personel Adı" ShowInCustomizationForm="True" >
                      <PropertiesComboBox TextField="PersonelName" ValueField="ID"></PropertiesComboBox>
                       </dx:GridViewDataComboBoxColumn>            
          </Columns>
</dx:ASPxGridView>

                           //                        on CodeBehind             //                          

protected void GridViewTRY_Init(object sender, EventArgs e)
{
   ASPxGridView gridView = (ASPxGridView)sender;
   ((GridViewDataComboBoxColumn)(gridView.Columns["PersonelFK"])).PropertiesComboBox.DataSource = myPersonalList;
}