private void DoWork() { Thread t = new Thread( new ThreadStart( this.DoSomething)); t.Start(); } private void DoSomething() { MessageBox.Show( “ thread start “); }
private void DoWork() { Thread t = new Thread( new ParameterizedThreadStart( this.DoSomething)); t.Start( “ guozhijian “); } private void DoSomething( object o) { MessageBox.Show(o.ToString()); }
private void DoWork() { ThreadPool.QueueUserWorkItem( new WaitCallback( this.DoSomething)); } private void DoSomething( object o) { MessageBox.Show( “ thread start “); }
private void DoWork() { ThreadPool.QueueUserWorkItem( new WaitCallback( this.DoSomething), “ guozhijian “); } private void DoSomething( object o) { MessageBox.Show(o.ToString()); }
private void DoWork() { string name = “ guozhijian “; ThreadPool.QueueUserWorkItem( new WaitCallback( delegate( object o){ MessageBox.Show(name); })); }
private void DoWork() { WaitCallback wc = new WaitCallback( this.DoSomething); ThreadPool.QueueUserWorkItem(wc, “ Guozhijian “); } private delegate void MyInvokeDelegate( string name); private void DoSomething( object o) { this.Invoke( new MyInvokeDelegate( this.ChangeText), o.ToString()); } private void ChangeText( string name) { this.textBox1.Text = name; }
private void DoWork() { WaitCallback wc = new WaitCallback( this.DoSomething); ThreadPool.QueueUserWorkItem(wc, “ Guozhijian “); } private void DoSomething( object o) { this.Invoke( new Action< string>( this.ChangeText), o.ToString()); } private void ChangeText( string name) { this.textBox1.Text = name; }
本例传递一个参数，System.Action有很多个重载，可以无参数（非泛型），而最多可以有四个参数，同样采用匿名方法，不使用泛型形式的System.Action，如下：
private void DoWork() { WaitCallback wc = new WaitCallback( this.DoSomething); ThreadPool.QueueUserWorkItem(wc, “ Guozhijian “); } private void DoSomething( object o) { this.Invoke( new Action( delegate() { this.textBox1.Text = o.ToString(); })); }
private void DoWork() { WaitCallback wc = new WaitCallback( this.DoSomething); ThreadPool.QueueUserWorkItem(wc, “ Guozhijian “); } private void DoSomething( object o) { System.Func< string, int> f = new Func< string, int>( this.GetId); object result = this.Invoke(f,o.ToString()); MessageBox.Show(result.ToString()); } private int GetId( string name) { this.textBox1.Text = name; if (name == “ Guozhijian “) { return 999; } else { return 0; } }
本文例中都是用this来引用，这里this替换为窗体任何一个控件的句柄都是OK的，因为Control.Invoke含义是将方法委托给拥有该Control的线程去执行。
很不错的文章。想当时自己学习多线程的时候绕了很久。
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