子窗体的datagridview从主窗体的datagridview获取数据

子窗体

#region 增加地点

        private void button_AddHosAdr_Click(object sender, EventArgs e)
        {
            DlgAddPeBatchHspAdr dlgpbha = new DlgAddPeBatchHspAdr();
            dlgpbha.EvtRefresh += dlgpbha_EvtRefresh;
            //显示对话框
            dlgpbha.ShowDialog();
        }

        void dlgpbha_EvtRefresh(object sender, RefreshEventArgs e)
        {
            try
            {
                if (sender != null)
                {
                    List<pe_srvhosp> items = sender as List<pe_srvhosp>;//新增数据
                    if (items != null && items.Count > 0)
                    {
                        //原有数据
                        BindingCollection<pe_srvhosp> list = this.dataGridView_pe_srvhosp_list.DataSource as BindingCollection<pe_srvhosp>;

                        if (list != null && list.Count > 0)
                        {
                            List<pe_srvhosp> listsrvhosp = list.Intersect(items, new pe_srvhosp_Equality()).ToList();//重复数据
                            if (listsrvhosp != null && listsrvhosp.Count > 0)
                            {
                                var chaji = items.Except(listsrvhosp, new pe_srvhosp_Equality()).ToList();//差集（A集合有,B没有）
                                foreach (pe_srvhosp srv in chaji)
                                {
                                    list.Add(srv);//新增数据去重后添加到原有数据
                                }
                                this.dataGridView_pe_srvhosp_list.DataSource = new BindingCollection<pe_srvhosp>(list);
                                this.dataGridView_pe_srvhosp_list.Refresh();
                            }
                            else
                            {
                                foreach (pe_srvhosp srv in items)
                                {
                                    list.Add(srv);
                                }
                                this.dataGridView_pe_srvhosp_list.DataSource = list;
                                this.dataGridView_pe_srvhosp_list.Refresh();
                                int hosp_id = Convert.ToInt32(dataGridView_pe_srvhosp_list.Rows[0].Cells["Column_hosp_id"].Value); //获取第一行中列名为Column_hosp_id的值

                                if (hosp_id <= 0)
                                {
                                    dataGridView_pe_srvhosp_list.Rows.RemoveAt(0); //移除第一行数据

                                }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "体检批次", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        #endregion

主窗体

DlgAddPeBatchHspAdr窗口
//在最上方声明变量
 public event EventHandler<RefreshEventArgs> EvtRefresh;

#region 保存体检地点
        private void button_save_Click(object sender, EventArgs e)
        {
            try
            {
                if (dataGridView_main.SelectedRows != null && dataGridView_main.SelectedRows.Count > 0)
                {
                    pe_srvhosp srvhosp = null;
                    List<pe_srvhosp> list = new List<pe_srvhosp>();
                    foreach (DataGridViewRow row in dataGridView_main.SelectedRows)
                    {
                        srvhosp = row.DataBoundItem as pe_srvhosp;
                        list.Add(srvhosp);
                    }
                    if (EvtRefresh != null)
                    {
                        EvtRefresh(list, null);
                    }
                    this.Close();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "增加医院", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        #endregion