签到计时

 public  List<myist> list = new List<myist>();//创建一个单列集合
        private void Form1_Load(object sender, EventArgs e)
        {
            //将他们都存在这个单列集合中
            myist a = new myist();
            a.hao = 20090101;
            a.name = "王小毛";
            a.age = 19;
            a.Sex = "男";

            myist a2 = new myist();
            a2.hao = 20090102;
            a2.name = "周新宇";
            a2.age = 19;
            a2.Sex = "男";

            list.Add(a);
            list.Add(a2);
            dataGridView1.DataSource = list;//将单列集合中的数据连接到 dataGridView中。

        }

public void clear(List<myist> list)
        {

            dataGridView1.DataSource = new BindingList<myist>(list);//刷新dataGridView数据。
        }
        private void 新增ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //新增一个
            Form2 a = new Form2();
            a.fmr = this;
            a.Show();
            this.Hide();
        }

   private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {

                 string  a= dataGridView1.SelectedCells[0].Value.ToString();//获取首行首列的值
                 for (int i = 0; i < list.Count; i++)
                 {
                     //遍历出list下标和dataGridView首行首列的值，让他们作比较，相等就删除。
                     int b = Convert.ToInt32 (a);
                     if(list[i].hao==b)
                     {
                         list.RemoveAt(i);//删除
                     }
                     dataGridView1.DataSource = new BindingList<myist>(list);//刷新dataGridView数据
                 }

        }

//查看
        private void button1_Click(object sender, EventArgs e)
        {
            List<myist> temp = new List<myist>();
           //遍历出ID，根据工号模糊查询。
            foreach (myist item in list)
            {
               string num=item.hao.ToString();//进行类型转换，因为hao号是int类型

                //用string类的INdexOf()实现模糊查询。
                  if (num.IndexOf(this.textBox1.Text.Trim())!=-1)
                  {
                      temp.Add(item);
                }
                  dataGridView1.DataSource = new BindingList<myist>(temp);//刷新 dataGridView窗体。
            }
        }

  public static  Dictionary<string, Record> recordList = new Dictionary<string, Record>();//创建一个双列集合，将签到时间和签退时间存放在一个双列集合中。
        private void 签到ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //查看是否选中一行。
            if (dataGridView1.SelectedRows.Count != 1)
            {
                MessageBox.Show("请选中一行");
            }
            string s = dataGridView1.SelectedCells[0].Value.ToString();
            //遍历得到key的值，然后和dataGridView下标为id的值相匹配。
            foreach (string hao  in recordList.Keys  )
            {
                if(s==hao)
                {
                    MessageBox.Show("已经签到");
                }
            }

            Record a = new Record();
            a.hao = s;
            a.Name = dataGridView1.SelectedCells[1].Value.ToString();
            a.time1 = DateTime.Now;//获取签到的时间。
            recordList.Add(a.hao,a);
            MessageBox.Show("签到成功");

        }

        private void 签退ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.dataGridView1.SelectedRows.Count!=1)
            {
                MessageBox.Show("请选中一行");
            }
            string hao = dataGridView1.SelectedCells[0].Value.ToString();
            bool isout = false;
            foreach (string key  in recordList.Keys)
            {
                if(key==hao){
                    recordList[key].time1 = DateTime.Now;
                    MessageBox.Show("签退成功");
                    isout = true;
                    break;
                }
            }
            if(!isout)
            {
                MessageBox.Show("抱歉签到未成功");
            }
        }