报错：An exception of type 'System.Data.Entity.Infrastructure.DbUpdateException' occurred in EntityFramework.dll but was not handled in user code

用EF提交信息添加保存的时候出错：

An exception of type 'System.Data.Entity.Infrastructure.DbUpdateException' occurred in EntityFramework.dll but was not handled in user code

从错误信息发现是类型转换的问题，有几个时间字段没赋值提交，结果保存。把却的字段补全赋值测试OK