【2019】委托/事件/异步/跨线程调用UI控件/多线程(Detegate/Event/Sync/InvokeRequired)

委托/事件/异步/InvokeRequired/MultiThreading (Detegate/Event/Sync/InvokeRequired/MultiThreading )

委托事件

      #region Delegate1
      private void btnExe_Click(object sender, EventArgs e)
      {
          MyClass myObject = new MyClass();
          myObject.WorkCompletedDelegate += TestDelegate;
          myObject.WorkCompleted += TestEvent;
          myObject.WorkCompletedDelegate();

          myObject.Fire();
          myObject.Fier2();
          myObject.WorkCompletedDelegate();
          // myObject.WorkCompleted();  // this line will raise compiling error
      }
      static void TestEvent()
      {
          Console.WriteLine("test event");
      }

      static void TestDelegate()
      {
          Console.WriteLine("test delegate");
      }

      public class MyClass
      {
          public delegate void CompletedEventHandler();

          public event CompletedEventHandler WorkCompleted;
          public CompletedEventHandler WorkCompletedDelegate;

          public event CompletedEventHandler WorkCompleted2;

          public void Fier2()
          {
              WorkCompleted2 = new CompletedEventHandler(TestDelegate2);
              WorkCompleted2.BeginInvoke(null, null);
              //WorkCompleted2(TestDelegate);
          }

          public void TestDelegate2()
          {
              Console.WriteLine("test delegate2");
          }

          public void Fire()
          {
              if (WorkCompleted != null)
              {
                  this.WorkCompleted();
              }

              if (WorkCompletedDelegate != null)
              {
                  this.WorkCompletedDelegate();
              }
          }
      }
      #endregion

Result:

      #region Delegate2
      private void btnDelegate_Click(object sender, EventArgs e)
      {
          Test obj = new Test();
          obj.print += printout1;      //绑定printout1方法
          obj.print += printout2;      //绑定printout2方法
          obj.start();
      }
      static void printout1()
      {
          Console.WriteLine("输出第一段字符串");
      }
      static void printout2()