You will have to use something like below. Just get the right Data item in place of
lstTrxn.ID, also if you could post the Model details we can refine this solution
@Html.ListBox("ListTrxn", Model.Select(item => new SelectListItem { Text = item.lstTrxn.ID.ToString() }), new {@class= "textinput", @style = "height:112px;width:164px"})