dc.TongJi_Qis.DeleteAllOnSubmit(v);
dc.SubmitChanges();
后
dc.TongJi_Qi_JiBens.InsertOnSubmit(xx);
dc.SubmitChanges();//出错
Cannot add an entity with a key that is already in use
我看了表，记录被删除了。
------解决方法--------------------------------------------------------
是不是插入的主键值重复了呢？
