Asp.net编写的学生管理系统 有学生选课、老师上传成绩、管理员管理系统等多种功能 还能够对学生成绩进行统计，生成饼状统计图 安全性在设计时也考虑在内-Asp.net student management system written in a student enrollment, teachers upload performance, system administrators to manage multiple functions can also be statisti