文档介绍：教务管理员操作流程 1、使用 Admin 账号登陆——教务管理员系统代码区域: int count = 0; bool isValidUser = false ; if (loginType =="教务管理员") { string sql = string .Format( "select count(*) from Admin where LoginId='{0}' AND LoginPwd='{1}'" , loginId, loginPwd); try { mand = new mand (sql, DBHelper .connection); DBHelper .(); count =( int )(); if (count == 1) { isValidUser = true ; } else { index++; if (index <=3) { message ="用户名或密码不存在! "; } else if (index >= 3) { Application .Exit(); } isValidUser = false ; }} catch ( Exception ex) { message = ; Console .WriteLine(); } finally { DBHelper .(); } if ( =="教务管理员"){ AdminForm adminForm = new AdminForm (); (); return true ;} 成功进入后可以进行 (教务管理员窗体) 用户管理→新增用户→新增学生信息(代码如下:) AddStudentForm Form = new AddStudentForm (); = this ; (); →弹出窗口(学生信息添加) → Student 表 保存按钮代码如下: if (TianJia()) { try { mand = new mand (sql, DBHelper .connection); DBHelper .(); int result = (); if (result != 1) { MessageBox .Show( "添加失败","输入提示", MessageBoxButtons .OK, MessageBoxIcon .Information); } else { MessageBox .Show( "添加成功","输入提示", MessageBoxButtons .OK, MessageBoxIcon .Information); }} catch ( Exception ex) { MessageBox .Show(); } finally { DBHelper .(); }}} private void AddStudent