.net数据绑定时动态改变值

--------后台--------------------

protected string GetStr(string boo)
        {
            if ("False".Equals(boo))
            {
                return "未完成";
            }
            else
            {
                return "已完成";
            }
        }

--------前台-------------------

<%# GetStr(Eval("IsDoneByCompany").ToString())%>