Winform中子线程访问界面控件时被阻塞解决方案

public partial class WebData_Import : Form
    {
        //声明用于访问主界面的委托类型
        public delegate void deleGetOrderdata(string info);
        //声明访问主界面委托类型的变量
        public deleGetOrderdata OptGetOrderData;
        int CompanyID = 0;
        public WebData_Import()
        {
            InitializeComponent();
            cmbCompany.Items.Insert(0, "公司001");
            cmbCompany.Items.Insert(1, "公司002");
            cmbCompany.SelectedIndex = 0;
            //实例化委托
            OptGetOrderData = new deleGetOrderdata(ShowOperationInfo);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            txtOperationInfo.Text = "";
            switch (cmbCompany.SelectedIndex)
            {
                case 0:
                    CompanyID = 001;
                    break;
                case 1:
                    CompanyID = 002;
                    break;
            }
            //执行获取订单数据线程
            Thread GetOrderDataThread = new Thread(new ThreadStart(ExecuteGetOrderData));
            GetOrderDataThread.Start();
        }

        /// <summary>
        /// 访问主界面的方法
        /// </summary>
        /// <param name="ShowInfo"></param>
        private void ShowOperationInfo(string ShowInfo)
        {
            txtOperationInfo.Text += ShowInfo + "\r\n";
        }

        private void ExecuteGetOrderData()
        {
            DataTable GetOrderData = new DataTable();
            //使用BeginInvoke从子线程访问主界面，传入访问主界面的方法和参数
            this.BeginInvoke(OptGetOrderData, "1、导入数据操作开始");
            this.BeginInvoke(OptGetOrderData, "\r\n2、正在获取数据，请稍后...");
            try
            {
                GetOrderData = GetOrderTable(CompanyID, Convert.ToDateTime(Sdate.Text), Convert.ToDateTime(Edate.Text));
                if (GetOrderData == null)
                {
                    throw new Exception("没有从远程服务获取到任何数据");
                }
                this.BeginInvoke(OptGetOrderData, "\r\n3、已获取" + GetOrderData.Rows.Count + "条数据，正在执行往数据库插入操作...");
                SQLDBHELPER help = new SQLDBHELPER();
                int InsertCount = help.SqlInsertBuilder(GetOrderData);
                this.BeginInvoke(OptGetOrderData, "\r\n4、成功插入" + InsertCount + "条数据,正在执行存储过程请稍后...");
                string ErrorMessage = help.exectrans();
                if (string.IsNullOrEmpty(ErrorMessage.Trim()))
                {
                    this.BeginInvoke(OptGetOrderData,"\r\n5、存储过程执行成功，所有操作均已成功执行完毕！");
                }
                else
                {
                    this.BeginInvoke(OptGetOrderData, "\r\n5、存储过程执行失败！失败原因：" + ErrorMessage);
                }
            }
            catch (Exception ex)
            {
                this.BeginInvoke(OptGetOrderData, "\r\n系统执行异常，异常原因：" + ex.Message);
            }
        }
    }