关于ui线程异步方法回调函数ui线程阻塞的问题

lolylyx 2012-07-14 10:02:29

先贴代码

internal Image back = new Image() { Stretch = Stretch.Fill }; //当前场景中的背景



ServiceReference1.WebServiceSoapClient WSC = new SilverlightChart.ServiceReference1.WebServiceSoapClient();



	public MainPage()

        {

            InitializeComponent();



            //this.Width = back.Width = 800;

            //this.Height = back.Height = 500;

            this.Background = new SolidColorBrush(Colors.Transparent);



            Loaded += new RoutedEventHandler(MainPage_Loaded);



            this.LayoutRoot.Children.Add(container);



            Add(back, -1);



        }



        public void CallManage()

        {

		string[] parm =  {"U","I"};

                GetData(parm);

                    

        }



        /// <summary>

        /// Function to create a chart

        /// </summary>

        public void CreateChart(Object obj)

        {

		//解决跨线程访问ui对象？

            this.Dispatcher.BeginInvoke(delegate

            {

            JsonObject json = (JsonObject)obj;

            

            Chart chart = new Chart();

            

            chart.ZoomingEnabled = true;

            chart.ToolBarEnabled = true;

            chart.ScrollingEnabled = false;

            container.Children.Add(chart);

                    Canvas.SetLeft(chart, 5);

                    Canvas.SetTop(chart, 0);

            });

        }



        private void GetData(string[] callStr)

        {

            SilverlightChart.ServiceReference1.ArrayOfString callArray = new SilverlightChart.ServiceReference1.ArrayOfString();

            for (int i = 0; i < callStr.Length; i++)

            {

                callArray.Add(callStr[i]);

            }



            WSC.ChartCompleted += new EventHandler<SilverlightChart.ServiceReference1.ChartCompletedEventArgs>(WSC_ChartCompleted);

            WSC.ChartAsync(callArray);



        }



        //delegate void AsyncCreatChart(JsonObject obj);

        //SynchronizationContext syn;



        private void WSC_ChartCompleted(object sender, SilverlightChart.ServiceReference1.ChartCompletedEventArgs e)

        {   //异步调用完毕

            JsonObject jsonObject = (JsonObject)JsonObject.Parse(e.Result);//e.Result为JSON文本

	//这里调用后silverlight出错，是否还是阻塞ui线程，如何处理？

            ThreadPool.QueueUserWorkItem(new WaitCallback(CreateChart), jsonObject);

        }



        void MainPage_Loaded(object sender, RoutedEventArgs e) 

        { 

            App myapp = (App)App.Current;



            //取得控件

            HtmlElement he = HtmlPage.Document.GetElementById("serach");

            //为控件注册事件

            he.AttachEvent("onclick", (EventHandler)serachHanddle);



            

            //HtmlPage.Window.Invoke("setFrameHeight", this.Height);

        }



        //控件事件

        void serachHanddle(object sender, EventArgs args)

        {

            //取得html输入控件

            //beginDate = HtmlPage.Document.GetElementById("beginDate").GetProperty("Value").ToString();

            

            CallManage();

        }