这不是一个真正的ASP.Net问题。您需要做的是在users表中创建一个自动增量字段，每次添加新用户时都会为您提供增加的ID。



了解有关自动增量的更多信息现场：



http://www.w3schools.com /sql/sql_autoincrement.asp [ ^ ]

It's not really a ASP.Net question. What you need to do is create a auto increment field in your users table which gives you the incremented id every time a new user is added.

Read more about Auto Increment Field here:

http://www.w3schools.com/sql/sql_autoincrement.asp[^]

我认为您的问题是在插入后获取最后插入的标识值。参考：

@@ IDENTITY（Transact-SQL） [ ^ ]

I think your issue is about getting the last-inserted identity value after an insertion. Refer:
@@IDENTITY (Transact-SQL)[^]