用类与对象编辑学生管理系统实现对学生的增添，删除，排序，查找，改变功能；
急用
谢谢了！！！

就完成了一个功能。添加、更新。
任务量比较大。
如果要是用，先执行运行数据库文件；

好快的速度
PFPF

OleDbConnection conn;
        DataSet ds;
        OleDbDataAdapter sda;
        private void Form1_Load(object sender, EventArgs e)
        {  // provider=Microsoft.Jet.OleDb.4.0;Data Source=5.mdb
            try
            { //连接数据库
                conn = new OleDbConnection("provider=Microsoft.Jet.OleDb.4.0;Data Source=info.mdb");
                conn.Open();
                OleDbCommand cmd = new OleDbCommand("select *from info", conn);
                sda = new OleDbDataAdapter();//实例化适配器DataAdapter对象
                sda.SelectCommand = cmd;   //设置DataAdapter对象的SelectCommand属性
                ds = new DataSet();          //实例化DataSet
                sda.Fill(ds, "info");
                dataGridView1.DataSource = ds.Tables[0];
            }
            catch
            {
                MessageBox.Show("连接数据库失败！");
            }
        }

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {   
            txtNo.Text = dataGridView1.SelectedCells[0].Value.ToString();
            txtName.Text = dataGridView1.SelectedCells[1].Value.ToString();
            txtsex.Text = dataGridView1.SelectedCells[2].Value.ToString();
            txtage.Text = dataGridView1.SelectedCells[3].Value.ToString();
            
        }
        //更新
        private void button1_Click(object sender, EventArgs e)
        {
            DataTable dt=ds.Tables["info"];
            sda.FillSchema(dt,SchemaType.Mapped);
            DataRow dr = dt.Rows.Find(txtNo.Text);

            dr["姓名"]=txtName.Text.Trim();
            dr["性别"]=txtsex.Text.Trim();
            dr["年龄"]=txtage.Text.Trim();
            OleDbCommandBuilder cmdbuder = new OleDbCommandBuilder(sda);
            sda.Update(dt);
        }
        //添加
        private void button2_Click(object sender, EventArgs e)
        {
            
         
            OleDbCommand cmd1 = new OleDbCommand("insert into info values('"+txtNo.Text.Trim()+"','"+txtName.Text.Trim()+"','"+txtsex.Text.Trim()+"','"+txtage.Text.Trim()+"')",conn);
           
            cmd1.ExecuteNonQuery();
        }

这哪需要数据库
public class student
    {
       public int id { get; set; }
       public string name { get; set; }
    }
 class Program
    {
 static  List<student> students = new List<student>();
        static void Main(string[] args)
        {

            students.Add(new student() { id = 2, name = "sa" });
            students.Add(new student() { id = 1, name = "st" });
            students.Add(new student() { id = 5, name = "saa" });
            students.Add(new student() { id = 3, name = "stt" });
            Program p = new Program();
            p.select(2);
            p.sort();
}
 public int add(student _student)
        {
            students.Add(_student);
            return students.Count;;
        }
        public void delete(int id)
        {
          List<student> lsts=  students.Where(n => n.id ==id).ToList<student>();
          foreach (student s in lsts)
          {
              students.Remove(s);
          }
         
        }
        public void sort()
        {

            List<student> lsts = (from _stu in students orderby _stu.id select _stu).ToList<student>();
           
            students = lsts;
        }
        public student select(int id)
        {
            return students.Where(n => n.id == id).ToList<student>().Count == 0 ? null : students.Where(n => n.id == id).ToList<student>()[0];

        }
        public void update(student _student)
        {
           
            delete(_student.id);
            students.Add(_student);

        }
}

.

来晚了。。。。。。。。

谢谢了

呵呵，大家