wpf 线程与界面线程

Thread thread = new Thread(new ThreadStart(() =>
        {
            VisualTarget visualTarget = new VisualTarget(hostVisual);
            var control = new UserControl1();
            control.Arrange(new Rect(new Point(), content.RenderSize));
            visualTarget.RootVisual = control;

            System.Windows.Threading.Dispatcher.Run();

        }));

        thread.SetApartmentState(ApartmentState.STA);
        thread.IsBackground = true;
        thread.Start();

 //同步步执行

 System.Windows.Application.Current.Dispatcher.Invoke(() =>
{

//操作界面控件
});

beginInvoke //异步执行

System.Windows.Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                           {
                               
                           }));

 //启用一个线程

Task.Factory.StartNew(() =>

{

});

//Task 为一种线程 CancellationTokenSource 控制Task 执行

• Task t1 = Task.Factory.StartNew(delegate { MyMethodA(); });

• Task t2 = Task.Factory.StartNew(delegate { MyMethodB(); });
• t1.Wait();
• t2.Wait();

下面是3中方式（摘取实例）

Control.CheckForIllegalCrossThreadCalls=false;来解决。设置为false表示不对错误线程的调用进行捕获。

线程自动定时执行

Task.Factory.StartNew<Update.UpdateConfig>(() =>
                {
                    Thread.Sleep(3000);
                    bool isnew = Update.UpdateService.CheckNewVersion();
                    if (isnew)
                    {
                        UpdateConfig config=Update.UpdateService.GetNewVersion();
                        HasChecked = true;
                        return config;
                    }
                    return null;
                }, CancellationToken.None, TaskCreationOptions.None, TaskScheduler.Default)
                .ContinueWith((e) =>
                {
                    if (e.Exception == null)
                    {
                        if (e.Result != null)
                        {
                            Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                            {
                              
                            }));
                        }
                    }
                });

委托界面传值

delegate void SafeSetText(string strMsg);
private void SetText(string strMsg)
{
 if(textbox1.InvokeRequired)
 {
            SafeSetText objSet=new SafeSetText(SetText);
            textbox1.Invoke(objSet,new object[]{strMsg});

 }
 else
 {
   textbox1.Text=strMsg;
 }
}

在线程内需要设置textbox的值时调用SetText方法既可。我们还可以采用另一种委托的方式来实现，那就是匿名代理，例如：

delegate void SafeSetText(string strMsg);
private void SetText2(string strMsg)
{
　　SafeSetText objSet = delegate(string str)
   {
       textBox1.Text = str;
   }
   textBox1.Invoke(objSet,new object[]{strMsg});
}