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1、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 SqlCommand command = new SqlCommand(sql, DBHelper.connection); DBHelper.connection.Open();
2、count = (int)command.ExecuteScalar(); if (count = 1) isValidUser = true; else index+; if (index = 3) Application.Exit(); isValidUser = false; catch (Exception ex) message = ex.Message; Console.WriteLine(ex.Message); finally DBHelper.connection.Close(); if (cboType.Text = 教务管理员) AdminForm adminForm =
3、 new AdminForm(); adminForm.Show(); return true; 成功进入后可以进行AdminForm.cs （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 addstudnetForm = new AddStudentForm(); addstudnetForm.MdiParent = this; addstudnetForm.Show();弹出窗口（学生信息添加）Student表AdminStudentForm.cs保存按钮代码如下: if (TianJia() try SqlCommand command = n
4、ew SqlCommand(sql, DBHelper.connection); DBHelper.connection.Open(); int result = command.ExecuteNonQuery(); 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 (Exce
5、ption ex) MessageBox.Show(ex.Message); finally DBHelper.connection.Close(); private void AddStudentForm_Load(object sender, EventArgs e) string sql = select gradeName from Grade; try SqlCommand command=new SqlCommand(sql,DBHelper.connection); DBHelper.connection.Open(); SqlDataReader reader=command.
6、ExecuteReader(); while(reader.Read() string gradeName=(string)reader0; cboGrade.Items.Add(gradeName); reader.Close(); catch(Exception ex) MessageBox.Show(ex.Message); finally DBHelper.connection.Close(); private void cboGrade_SelectedIndexChanged(object sender, EventArgs e) if (cboGrade.Text.Trim()
7、!= ) int gradeId = -1; string sql = string.Format(select GradeId from Grade where GradeName=0,cboGrade.Text); SqlCommand command = new SqlCommand(sql, DBHelper.connection); try DBHelper.connection.Open(); SqlDataReader reader = command.ExecuteReader(); if (reader.Read() gradeId = (int)reader0; reade
8、r.Close(); catch (Exception ex) MessageBox.Show(操作数据库出错); Console.WriteLine(ex.Message); finally DBHelper.connection.Close(); sql = SELECT ClassName FROM Class WHERE GradeId= +gradeId; command.CommandText = sql; try DBHelper.connection.Open(); SqlDataReader reader = command.ExecuteReader(); string c
9、lassName = ; cboClass.Items.Clear(); while (reader.Read() className = (string)readerClassName; cboClass.Items.Add(className); reader.Close(); catch (Exception ex) MessageBox.Show(操作数据库出错); Console.WriteLine(ex.Message); finally DBHelper.connection.Close(); private void txtStudentPassword_TextChanged
10、(object sender, EventArgs e) AdminTeacherForm.cs （教师信息添加窗体） 新增教师信息弹出窗口（教师信息添加）Teacher表保存按钮代码如下:if (TianJia() try SqlCommand command = new SqlCommand(sql, DBHelper.connection); DBHelper.connection.Open(); int result = command.ExecuteNonQuery(); if (result != 1) MessageBox.Show(添加失败, 输入提示, MessageBoxB
11、uttons.OK, MessageBoxIcon.Information); else MessageBox.Show(添加成功, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); catch (Exception ex) MessageBox.Show(操作数据库出错, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); Console.WriteLine(ex.Message); finally DBHelper.connection.Close(); 查询修改信
12、息学生信息查询及删除信息（可以进行模糊查询）SearchStudentForm.cs （学生查询及删除信息窗体）查询按钮代码：if (txtName.Text = ) MessageBox.Show(请输入用户名, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); txtName.Focus(); else SearchStudent(); private void tsmiDelete_Click(object sender, EventArgs e) if (listView1.SelectedItems.Count = 0)
13、 MessageBox.Show(您没有选择任何用户, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); else DialogResult choice = MessageBox.Show(确定要删除该用户吗, 警告, MessageBoxButtons.OK, MessageBoxIcon.Information); if (choice = DialogResult.OK) int result = 0; try string sql = string.Format(delete Student where StudentI
14、d=0, (int)listView1.SelectedItems0.Tag); SqlCommand command = new SqlCommand(sql, DBHelper.connection); DBHelper.connection.Open(); result = command.ExecuteNonQuery(); catch (Exception ex) MessageBox.Show(ex.Message); finally DBHelper.connection.Close(); if (result 1) MessageBox.Show(删除失败, 输入提示, Mes
15、sageBoxButtons.OK, MessageBoxIcon.Exclamation); else MessageBox.Show(删除成功, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); SearchStudent(); UpdateStudentForm.cs （学生更新信息窗体）保存信息按钮代码:DialogResult result = MessageBox.Show(确实要将修改保存到数据库吗？, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information);
16、if (result = DialogResult.OK) SqlCommandBuilder builder = new SqlCommandBuilder(dataAdapter); dataAdapter.Update(dataSet, Student); MessageBox.Show(保存成功, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); else MessageBox.Show(保存失败, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); Searc
17、hTeacherForm.cs （教师查询及删除信息窗体）查询按钮代码：if (txtName.Text = ) MessageBox.Show(请输入用户名, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); txtName.Focus(); else SearchTeacher(); private void btnExit_Click(object sender, EventArgs e) this.Close(); private void tsmiDelete1_Click(object sender, EventArg
18、s e) if (listView1.SelectedItems.Count = 0) MessageBox.Show(您没有选择任何用户, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); else DialogResult choice = MessageBox.Show(确定要删除该用户吗, 警告, MessageBoxButtons.OK, MessageBoxIcon.Information); if (choice = DialogResult.OK) int result = 0; try string sql =
19、string.Format(delete Teacher where TeacherId=0, (int)listView1.SelectedItems0.Tag); SqlCommand command = new SqlCommand(sql, DBHelper.connection); DBHelper.connection.Open(); result = command.ExecuteNonQuery(); catch (Exception ex) MessageBox.Show(ex.Message); finally DBHelper.connection.Close(); if
20、 (result 1) MessageBox.Show(删除失败, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Exclamation); else MessageBox.Show(删除成功, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); SearchTeacher(); UpdateTeacherForm.cs （教师更新信息窗体）保存信息按钮代码:DialogResult result = MessageBox.Show(确实要将修改保存到数据库吗？, 输入提示,MessageBo
21、xButtons.OK, MessageBoxIcon.Information); if (result = DialogResult.OK) SqlCommandBuilder builder = new SqlCommandBuilder(dataAdapter); dataAdapter.Update(dataSet, Teacher); MessageBox.Show(保存成功, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); else MessageBox.Show(保存失败, 输入提示, MessageBoxButtons.OK, MessageBoxIcon.Information); 娱乐通过引用完成操作退出系统 重新登录（代码如下：） LoginForm fm1 = new LoginForm(); this.Hide(); fm1.Show();帮助说明版权说明（HelpForm.cs 帮助窗体）帮助信息（MessageBox.Show(欢迎使用帮助系统n本系统新建用户初始密码：n【123】, 帮助信息);）运行屏保（引用外部文件）