使用TaskScheduler 调度器 实现跨线程的控件访问

Posted 2020-09-02 Young_汨

 1         //任务调度器
 2         TaskScheduler UIscheduler = null;
 3         public Form1()
 4         {
 5             //获取任务调度器
 6             UIscheduler = TaskScheduler.FromCurrentSynchronizationContext();
 7             InitializeComponent();
 8         }
 9 
10         private void btnTaskScheduler_Click(object sender, EventArgs e)
11         {
12             System.Threading.CancellationTokenSource cts = new System.Threading.CancellationTokenSource();
13             //启动一个任务线程
14             Task<int> t = Task.Run(() =>Sum(100));
15             //使用UIscheduler 调度器 实现跨线程的控件访问
16             t.ContinueWith(task => txtRes.Text = t.Result.ToString(), cts.Token,TaskContinuationOptions.OnlyOnRanToCompletion,UIscheduler);
17             t.ContinueWith(task => txtRes.Text = "Error",System.Threading.CancellationToken.None, TaskContinuationOptions.OnlyOnFaulted,UIscheduler);
18         }
19         private int Sum(int num)
20         {
21             int res = 0;
22             for (int i = 0; i <= num; i++)
23             {
24                 checked { res += i; }
25                 //res += i;
26             }
27             return res;
28         }