if (attribute_type == "S")
  {
    Value1_tbx.Visible = true;
    Value1_tbx.Text = some_value;
    Value_ddl.Visible = false;
    Value_Text_tbx.Visible = false;
    Value_Date_tbx.Visible = false;
    Value_Date_calendar_img.Visible = false;
    Value_rbl.Visible = false;
   }
else if (attribute_type == 'D')
   {
      Value1_tbx.Visible = false;
      Value_ddl.Visible = false;
      Value_Text_tbx.Visible = false;
      Value_Date_tbx.Visible = true;
      Value_Date_calendar_img.Visible = true;
      Value_Date_tbx.Text = some_value;
      Value_rbl.Visible = false;
    }
  else if (...and so on continues)