WPF线程(Step2)——BackgroundWorker

在WPF中第二个常用的线程处理方式就是BackgroundWorker。

以下是BackgroundWorker一个简单的例子。

public partial class MainWindow : Window    {        /// <summary>        /// 后台worker        /// </summary>        BackgroundWorker worker = new BackgroundWorker();        public MainWindow()        {            InitializeComponent();            worker.WorkerReportsPRogress = true;            worker.DoWork += new DoWorkEventHandler(worker_DoWork);            worker.ProgressChanged += worker_ProgressChanged;            this.btn_test.Click += btn_test_Click;        }        /// <summary>        /// 按钮点击        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void btn_test_Click(object sender, RoutedEventArgs e)        {            worker.RunWorkerAsync();        }        /// <summary>        /// 进度返回处理        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)        {            this.pb_test.Value = e.ProgressPercentage;        }        /// <summary>        /// 业务逻辑处理        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void worker_DoWork(object sender, DoWorkEventArgs e)        {            for (int i = 0; i <= 100; i++)            {                worker.ReportProgress(i);//返回进度                Thread.Sleep(100);            }        }    }

其中要注意的有BackgroundWorker的属性WorkerReportsProgress表示BackgroundWorker是否可以返回进度。事件DoWork中处理自身的业务逻辑，ProgressChanged负责更新界面操作。

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