if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
null和DBNull.Value有什么区别？帮解释一下这条语句~
------解决方案--------------------------------------------------------
查msdn
------解决方案--------------------------------------------------------
http://topic.csdn.net/u/20090224/09/08c41103-9772-4a72-ba23-43e4998db8d6