C# 使用代理实现线程间调用

namespace XXXX
{
    public partial class Frm_Manage : Form
    {
        // 客户端状态列表
        Dictionary<string, SocketClientInfo> clientList;
        // 线程间调用代理
        private delegate void DisplayDelegate(string clientIp, string clientNum, string status);
        // 心跳线程
        public Thread threadStatus { set; get; }

        public Frm_Manage()
        {
            // 允许线程间调用
            CheckForIllegalCrossThreadCalls = false;
            InitializeComponent();
        }

        private void Frm_Manage_Load(object sender, EventArgs e)
        {
            SocketServer Socketservice = SocketServer.GetInstance();
            clientList = Socketservice.GetClientDictionary();

            threadStatus = new Thread(() =>
            {
                while (true)
                {
                    foreach (SocketClientInfo item in clientList.Values)
                    {
                        bool existFlg = false;
                        foreach (Control subPan in this.flowLayoutPanel1.Controls)
                        {
                            if (subPan.Name == item.clientIp)
                            {
                                // 存在该终端，改变显示状态
                                subPan.BackColor = GetBackColor(item.clientStatus);
                                existFlg = true;
                                break;
                            }
                        }
                        if (!existFlg)
                        {
                            // 不存在该终端，添加新控件
                            AddDisplay(item.clientIp, item.clientNum, item.clientStatus);
                        }
                    }
                    this.flowLayoutPanel1.Refresh();

                    Thread.Sleep(1000 * time);// 间隔1秒刷新页面
                }
            });
            threadStatus.Start();
        }

        private Color GetBackColor(string status)
        {
            if (status == "0")
            {
                return Color.Silver;// 灰色
            }
            else if (status == "1")
            {
                return Color.LawnGreen;// 绿色
            }
            else if (status == "2")
            {
                return Color.Gold;// 黄色
            }
            else if (status == "3")
            {
                return Color.Orange;// 橙色
            }
            else if (status == "4")
            {
                return Color.Red;// 红色
            }
            else
            {
                return Color.Silver;// 灰色
            }
        }

        private void AddDisplay(string clientIp, string clientNum, string status)
        {
            try
            {
                //如果调用该函数的线程和控件flowLayoutPanel1位于同一个线程内
                if (this.flowLayoutPanel1.InvokeRequired == false)
                {
                    //直接将内容添加到窗体的控件上
                    Panel pal = new Panel();
                    pal.Name = clientIp;
                    pal.Width = DisStatusW_PX;
                    pal.Height = DisStatusH_PX;
                    pal.BackColor = GetBackColor(status);
                    pal.Controls.Add(pic);
                    
                    this.flowLayoutPanel1.Controls.Add(pal);
                }
                //如果调用该函数的线程和控件flowLayoutPanel1不在同一个线程
                else
                {
                    //通过使用Invoke的方法，让子线程告诉窗体线程来完成相应的控件操作
                    DisplayDelegate disp = new DisplayDelegate(AddDisplay);

                    //使用控件flowLayoutPanel1的Invoke方法执行Display代理(其类型是DisplayDelegate)
                    this.flowLayoutPanel1.Invoke(disp, clientIp, clientNum, status);
                }
            }
            catch (Exception e)
            {
                LogHelper.WriteError(typeof(Frm_Manage), e);
            }
        }
    }
}