ASP.NET实现学生管理系统

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();
    }

以上就是关于学生管理系统的实现的关键代码，希望对大家的学习有所帮助，大家可以动手制作学生管理系统，对学生管理系统功能进行扩充。