在使用Entity Framework的LINQ to sql的帮助下更新时,抛出异常。
System.Data.UpdateException: Unable to update the EntitySet 't_emp' because it has a DefiningQuery and no <UpdateFunction> element exists in the <ModificationFunctionMapping>
更新的代码是:
public void Updateall() { try { var tb = (from p in _te.t_emp where p.id == "1" select p).FirstOrDefault(); tb.ename = "jack"; _te.ApplyPropertyChanges(tb.EntityKey.EntitySetName,tb); _te.SaveChanges(true); } catch(Exception e) { } }
为什么我收到此错误?