WPF-PopupWindow

【功能与要求】（1）角色和权限管理。设有系统管理员、图书管理员和普通用户，他们设有不同的权限，各类用户进入系统时需先登录。（2）系统管理员角色，系统管理员管理各类用户的增加、删除、修改和查询。（3）图书管理员角色，图书管理员可对图书信息的录入、删除及修改、统计； （4）普通用户角色，普通用户可借阅图书、归还图书。(Functions and Requirements】 (1) the role and rights management. Offers system administrators, librarians and ordinary users, they have different permissions, all kinds of users need to be logged into the system. (2) System Administrator role, the system administrator to manage all types of users to add, delete, modify, and query. (3) the role librarian, librarians can book information entry, delete, and modify, statistics (4) the role of ordinary users, ordinary users can borrow books, return books.)

基于STM32F407的TCA6416A的驱动程序，TCA6416A双向通信，可以直接拿来用，函数都打包好了，还配有注释。(STM32F407 based on the TCA6416A driver, TCA6416A two-way communication, you can directly use it, the functions are packaged, and also with notes.)

计算机安全，清除CIH病毒的程序，程序中有部分说明。(Computer security, CIH virus removal procedures, procedures that are part of.)

MongoDB调用所需要DLL,包含增删改查，也可以批量处理(The DLL required for MongoDB calls, including add, delete, and change checks, can also be processed in batches.)

GPS伪距单点定位算法，自己写的。一起交流啊。(GPS pseudo range single point positioning algorithm, written by itself. Exchange it together.)

MailServer. 一个用.NET写的邮件发送服务(MailServer. A mail delivery services. NET to write)

返回系统驱动器类型，主要是查找光驱的盘符，内附源代码。(Return the system drive types, mainly the search drive letter, enclosing the source code.)

说明：  DSP28335主控芯片，永磁同步电机FOC控制算法程序(DSP28335 main control chip, permanent magnet synchronous motor FOC control algorithm program)

说明：  c#聊天程序源码,源码中实现聊天功能，用C#语言编写，有客户和服务器端(c# chat program source code)

图形界面的万年历源代码，适合初学者课程PJ使用(perpetual calendar)