MVC save data appears: An error occurred while updating the entries. See the inner exception for details.

View Details: datetime2 cannot insert datetime (approximate meaning)

As a result, look under, my class does not have a datetime2, breakpoint down, found that the modification time is empty, the result compilation run is automatically assigned to the default value of 0000-00-00 00:00:00,

Database fields are also datetime,

So, the field type that is directly inside the class is allowed to be empty, for example: public DateTime?  Crearedate{get;set;} Price question mark, allowed to be empty,

In this case, when the data is deposited, the time is empty.

Thank you: http://blog.csdn.net/u010032207/article/details/53214871

Http://blog.sina.com.cn/s/blog_bc5f90cd0102wufh.html

Http://bbs.csdn.net/topics/392055909?page=1

MVC save data appears: An error occurred while updating the entries. See the inner exception for details.