2019年5月7日
hasvalue vs !=null
摘要： Which is preferred: Nullable<T>.HasValue or Nullable<T> != null? The compiler replaces null comparisons with a call to HasValue, so there is no real d 阅读全文
posted @ 2019-05-07 18:48 ChuckLu 阅读(659) 评论(0) 推荐(0)
Procedure or function 'pu_usr_User' expects parameter '@WhiteIp', which was not supplied.
摘要： 遇到这个问题，是因为存储过程的参数，设置默认值写错了。 错误写法 @WhiteIp NVARCHAR(MAX) NULL, Stored procedure with default parameters I wrote with parameters that are predefined The 阅读全文
posted @ 2019-05-07 11:11 ChuckLu 阅读(579) 评论(0) 推荐(0)