c#下线程访问修改主窗体的界面数据

public static Form1 f = null;

private  delegate void SetCallBack(string str);//定义一个委托
private  SetCallBack setTextDisplaycallback;  //委托声明

 

 public Form1()
        {
            f = this;
            InitializeComponent();
            setTextDisplaycallback= new SetCallBack(setlabelDisplay);
           
        }

 private  void setlabelDisplay(string s)
        {
            this.Label1.Text = s;
        }
        public void settext(string s)
        {
            if (this.Label1.InvokeRequired)
            {
               
                this.Label1.Invoke(setTextDisplaycallback, s);
            }
            else
            {
                this.Label1.Text = s;
            }
        }

 

Form1.f.settext(string.Format("{0}",ID));