一霎清明雨，实现考勤管理。

1.首先是添加员工信息：

        public int type;
        //保存父窗体的引用
        public FrmMain FrmParent { get; set; }

        //
        public FrmAdd()
        {
            InitializeComponent();

            this.cboSex.SelectedIndex = 0;
     }

2.写在保存按钮里去：

try
            {
                //创建SE的对象
                SE se = new SE();
                se.ID = this.txtid.Text.Trim();
                se.Age = Int32.Parse(this.txtAge.Text.Trim());
                se.Name = this.txtName.Text.Trim();//姓名
                if (this.cboSex.SelectedItem.ToString() == "男")
                {
                    se.Gender = Gender.男.ToString();
                }
                else
                {
                    se.Gender = Gender.女.ToString();
                }
                //循环打印
                foreach (SE item in FrmParent.AddList)
                {
                    if (item.ID == se.ID)
                    {
                        MessageBox.Show("此工号已经存在！");
                        return;
                    }
                }
                //添加泛型集合里
                FrmParent.AddList.Add(se);
                this.Close();
            }
            catch (Exception ex)
            {

                MessageBox.Show(ex.Message);
            }
            finally
            {
                //刷新列表
                this.FrmParent.BindGrid(FrmParent.AddList);
            }
理解：

主窗口

  public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
        }
        public Dictionary<string, Record> dic = new Dictionary<string, Record>();
        //泛型集合
        public List<SE> AddList = new List<SE>();
        //刷新DataGridView数据
        public void BindGrid(List<SE> list)
        {
            this.divList.DataSource = new BindingList<SE>(list);
            
        }
        //主窗口
        private void FrmMain_Load(object sender, EventArgs e)
        {
           
        }
        //新增
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            FrmAdd fm = new FrmAdd();
            fm.type = 1;
            fm.FrmParent = this;
            fm.ShowDialog();
        }
        //查看
        private void btnLook_Click(object sender, EventArgs e)
        {
            List<SE> tempList = new List<SE>();//用于临时列表保存查询到的信息
            foreach (SE item in this.AddList)
            {
                //如果泛型集合的SE下标不等于-1
                if (item.ID.IndexOf(this.txtId.Text.Trim()) !=-1)
                {
                    tempList.Add(item);
                }
            }
            this.divList.DataSource = new BindingList<SE>(tempList);

        }
        //删除
        private void toolStripButton3_Click(object sender, EventArgs e)
        {
            DialogResult = MessageBox.Show("是否确定删除？","提示",MessageBoxButtons.YesNo,MessageBoxIcon.Question);
            if (DialogResult ==DialogResult.Yes)
            {
                //通过索引访问
                List<SE> tempList = new List<SE>();
                foreach (SE item in this.AddList)
                {
                    tempList.Remove(item);
                }
                this.divList.DataSource = new BindingList<SE>(tempList);
            }
        }
        //修改
        private void toolStripButton2_Click(object sender, EventArgs e)
        {

        }
      

        private void 签到ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //判断是否选中一行
            if (this.divList.SelectedRows.Count != 1)
            {
                MessageBox.Show("请选中一行！");
                return;
            }
            string workNo = divList.CurrentRow.Cells[0].Value.ToString();
            //遍历Key值
            foreach (string item in dic.Keys)
            {
                if (workNo == item)
                {
                    MessageBox.Show("您已经签到过！");
                    return;
                }
            }
            Record record = new Record();

            record.ID = workNo;//id号

            record.Name = divList.CurrentRow.Cells[1].Value.ToString();//获取选中的姓名
            record.SignInTime = DateTime.Now;//当前的时间
            this.dic.Add(record.ID,record);//添加到记录里
            MessageBox.Show("签到成功！");

        }

        private void 签退ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.divList.SelectedRows.Count !=1)
            {
                MessageBox.Show("请选择一行！");
                return;
            }
            string ID = divList.CurrentRow.Cells[0].Value.ToString();
            bool isOut = false;//标识是否已经签到过
            foreach (string item in dic.Keys)
            {
                if (item == ID)
                {
                    this.dic[item].SignOutTime = DateTime.Now;
                    MessageBox.Show("签退成功！");
                    isOut = true;
                    break;
                }
            }


            if (!isOut)
            {
                MessageBox.Show("很抱歉，尚未签到！");
            }
        }

        private void toolStripButton4_Click(object sender, EventArgs e)
        {
            Frmclock fm = new Frmclock();
            fm.FrmParent = this;
            fm.ShowDialog();
        }
    }

        public Frmclock()
        {
            InitializeComponent();
        }
        //保存父级
        public FrmMain FrmParent { get; set; }    

        public void show()
        {
            BindingSource bs = new BindingSource();
            bs.DataSource = FrmParent.dic.Values;
            this.dataGridView1.DataSource = bs;
        }
        private void Frmclock_Load(object sender, EventArgs e)
        {
            show();
        }