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本篇内容主要讲解“ASP.NET如何编写学生管理系统”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“ASP.NET如何编写学生管理系统”吧!
ASP.NET 是开源,跨平台,高性能,轻量级的 Web 应用构建框架,常用于通过 HTML、CSS、JavaScript 以及服务器脚本来构建网页和网站。
学生管理系统所需要的具体控件和主要属性:
1、登录窗体
基本控件:
label(标签控件)
主要属性:Image(在标签上显示的图像)
Text(在标签上显示的文本)
TextBox(文本框控件)
主要属性:PasswordChar(指示在作为密码框时,文本框中显示的字符,而不是实际输入的文本)
Button(按钮控件)
ComboBox(下拉框)属性:SelectedItem:获取当前选定的项
事件:Click(单击控件时发生)
private void butStyle_Click(object sender, EventArgs e) { string str = "Data source=.;Initial catalog=Myschool;uid=sa"; SqlConnection con = new SqlConnection(str); string sql = "select count(1) from student where studentName='" + txtUserName.Text + "' and LoginPwd='" + txtPwd.Text + "'"; SqlCommand cmd = new SqlCommand(sql, con); try { con.Open(); int count = Convert.ToInt32(cmd.ExecuteScalar()); if (count > 0) { MessageBox.Show("登陆成功"); this.Hide(); FormMain frm = new FormMain(); frm.Show(); } } catch (Exception) { MessageBox.Show("退出"); } finally { con.Close(); }
Sender是事件源,表示发生了这个事件的对象,事件发生中,事件源就是按钮。
e是事件参数(EventArgs)对象,不同的事件会有不同的参数。
Close()方法是窗体类Form的一个方法,作用是关闭窗体。
2.Myschool管理员
01.给菜单栏中的“新增学生”菜单项添加事件处理程序,代码如下
private void 新增学生ToolStripMenuItem_Click(object sender, EventArgs e) { FormStudent formStudent = new FormStudent(); formStudent.Show(); }
02.添加学生信息
public void Save() { //添加学生 string pwd = txtpwd.Text; string stuname = textname.Text; //性别 string stugender = string.Empty; if (radioman.Checked) { stugender = "1"; } else { stugender = "0"; } //下拉框绑定数据 int gid = GeadIdName(); //联系电话 string StuPhone = textphone.Text; //地址 string StuAddress = textAddress.Text; //日期 DateTime dt = dateBirthday.Value; //邮箱 string StuEmail = textEmail.Text; //LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Email string sql = "insert into Student values('" + pwd + "','" + stuname + "','" + stugender + "'," + gid + ",'" + StuPhone + "','" + StuAddress + "','" + dt + "','" + StuEmail + "')"; string str = "Data source=.;Initial catalog=Myschool;uid=sa;"; SqlConnection con = new SqlConnection(str); SqlCommand cmd = new SqlCommand(sql, con); con.Open(); int count = cmd.ExecuteNonQuery(); if (count > 0) { MessageBox.Show("添加成功"); } con.Close(); }
3.查询学生信息
//查询学生信息
public void LodaDataListView(string sql) { string str = "data source=.;initial catalog=Myschool;uid=sa;"; SqlConnection con = new SqlConnection(str); SqlCommand cmd = new SqlCommand(sql, con); try { con.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr != null) { if (dr.HasRows) { while (dr.Read()) { int stuNo = Convert.ToInt32(dr["studentNo"]); //姓名 string stuname = Convert.ToString(dr["studentName"]); //性别 string stuGender = Convert.ToString(dr["Gender"]); //年级名次 string stuGname = Convert.ToString(dr["Gradename"]); ListViewItem LvItem = new ListViewItem(stuNo.ToString()); LvItem.SubItems.Add(stuname); LvItem.SubItems.Add(stuGender); LvItem.SubItems.Add(stuGname); //让lvItem和ListView关联 lvlist.Items.Add(LvItem); } dr.Close(); } } } catch (Exception) { throw; } finally { con.Close(); } //窗体Load的事件中调用 private void Formselect_Load(object sender, EventArgs e) { string sql = "select StudentNO,StudentName,Gender,GradeName from Student,Grade where Student.GradeId=Grade.GradeId"; LodaDataListView(sql); }
修改学生信息
public void upatae() { //添加学生 string pwd = txtpwd.Text; string stuname = textname.Text; //性别 string stugender = string.Empty; if (radioman.Checked) { stugender = "1"; } else { stugender = "0"; } //下拉框绑定数据 int gid = GeadIdName(); //联系电话 string StuPhone = textphone.Text; //地址 string StuAddress = textAddress.Text; //日期 DateTime dt = dateBirthday.Value; //邮箱 string StuEmail = textEmail.Text; //LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Email string sql = @"update Student set StudentName='" + stuname + "',Gender=" + stugender + ",GradeId='" + gid + "',phone='" + StuPhone + "',Address='" + StuAddress + "',Birthday='" + dt + "',Email='" + StuEmail + "' where studentNo='" + textNo.Text + "'"; string str = "Data source=.;Initial catalog=Myschool;uid=sa;"; SqlConnection con = new SqlConnection(str); SqlCommand cmd = new SqlCommand(sql, con); con.Open(); int count = cmd.ExecuteNonQuery(); if (count > 0) { frmselect.selectData(); MessageBox.Show("修改成功"); } con.Close(); }
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