添加新用户控件时，计时器1未启动。我有1个用户控件（UC_Machine）。加载Form Main时，我使用计时器在查询变量中执行SQL查询，以从表[tbl_FF_Trigger]中获取数据
我有1个用户控件（UC_Machine）。当加载Form Main时，我使用计时器在查询变量中执行SQL查询，以从表[tbl_FF_Trigger]中获取数据

• UC机器中的代码：

private void UC_Machine_Load(object sender, EventArgs e)
        {
             timer1.Start();
        }
  private void timer1_Tick(object sender, EventArgs e)
        {
            string query = "SELECT CRDName, PartNumber ,DefectName FROM [tbl_FF_Trigger] where Machine = '" + Machine + "'";
            db.fillDataGridView(query, dataGridView1);
            dataGridView1.BackgroundColor = Color.White;
            dataGridView1.RowHeadersVisible = false;
            dataGridView1.Update();
            dataGridView1.Refresh();
        }

• MAIN格式的代码。将从函数Machine_Infor.GetMachine_Infors（）中获取机器信息。然后将根据该信息创建UC_Machine数组。如果数组中的机器尚未存在于面板布局中，则将其添加到面板布局中。

此外，它还检查tbl_FF_Trigger表中是否存在该机器。否则，它将从面板布局中删除该机器。

private void Main_Load(object sender, EventArgs e)
        {
            Get_Infor();
        }
 private void Get_Infor()
        {
            System.Timers.Timer timer = new System.Timers.Timer();
            timer.Interval = 3000; // Thời gian chạy (5000 milliseconds = 5 second)
            timer.Elapsed += Timer_Elapsed;
            timer.Start();
        }
     private void Timer_Elapsed(object sender, ElapsedEventArgs e)
        {

            // Add new item to panellayout if machine have falsecall
            var data = Machine_Infor.GetMachine_Infors();
            var list = new UC_Machine[data.Count];
            int i = 0;
            itemFoods = new List<UC_Machine>();
            itemFoodsFilter = new List<UC_Machine>();
            HashSet<string> existingMachine = new HashSet<string>();
            foreach (var item in data)
            {
                if (!existingMachine.Contains(item.Machine))
                {
                    bool isExisting = false;
                    foreach (UC_Machine uc in myFlowLayoutPanel1.Controls)
                    {
                        if (uc.Machine == item.Machine)
                        {
                            isExisting = true;
                            break;
                        }
                    }

                    if (!isExisting)
                    {
                        list[i] = new UC_Machine();
                        list[i].CRDName = item.CRDName;
                        list[i].Model = item.Model;
                        list[i].Machine = item.Machine;
                        list[i].PartNumber = item.PartNumber;
                        list[i].Workcell = item.Workcell;
                        list[i].CRDName = item.CRDName;
                        list[i].Date = item.Date;
                        itemFoods.Add(list[i]);
                        itemFoodsFilter.Add(list[i]);
                        existingMachine.Add(item.Machine);
                        i++;
                    }
                }
            }
            if (myFlowLayoutPanel1.InvokeRequired)
            {
                myFlowLayoutPanel1.Invoke((MethodInvoker)delegate
                {
                    myFlowLayoutPanel1.Controls.AddRange(list.Where(x => x != null).ToArray());
                });
            }
            else
            {
                myFlowLayoutPanel1.Controls.AddRange(list.Where(x => x != null).ToArray());
            }

            // Remove machine if Falsecall not found
            string maincon = ConfigurationManager.ConnectionStrings["Connstring"].ConnectionString;
            // Connect to the SQL Server database and execute the query to check for the existence of "vnhcmsleaoi05" in the "tbl_FF_Trigger" table.
            using (SqlConnection connection = new SqlConnection(maincon))
            {
                connection.Open();
                foreach (UC_Machine uc in myFlowLayoutPanel1.Controls)
                {
                    string query = "SELECT COUNT(*) FROM tbl_FF_Trigger WHERE Machine = '"+ uc.Machine+"'";
                    using (SqlCommand command = new SqlCommand(query, connection))
                    {
                        int count = (int)command.ExecuteScalar();
                        if (count == 0)
                        {
                            if (myFlowLayoutPanel1.InvokeRequired)
                            {
                                myFlowLayoutPanel1.Invoke((MethodInvoker)delegate
                                {
                                    myFlowLayoutPanel1.Controls.Remove(uc);
                                    itemFoods.Remove(uc);
                                    uc.Dispose();

                                });
                            }
                            else
                            {
                                myFlowLayoutPanel1.Controls.Remove(uc);
                                itemFoods.Remove(uc);
                                uc.Dispose();
                            }
                            break;
                        }
                    }
                }
            }

        }

当加载表单时，代码工作正常。当tbl_FF_Trigger添加新值时，myFlowLayoutPanel 1新UC_Machine，但计时器1未启动。我知道这一点，因为数据视图在新添加的UC_Machine中没有数据。我希望当myFlowLayoutPanel 1添加1 UC_Machine时，计时器1将启动。任何人对此情况有任何建议或解决方案，请帮助我。非常感谢！