using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;namespace BackGroundWorker
{/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>public partial class MainWindow : Window{BackgroundWorker worker = null;public MainWindow(){InitializeComponent();worker = new BackgroundWorker();}private void MyDoWork(object sender, DoWorkEventArgs e){for(int i = 0; i <= 100; i++){worker.ReportProgress(i);Thread.Sleep(2000);//如果检测到点击了取消按钮，则退出当前循环if (true == worker.CancellationPending){e.Cancel = true;break;}}}private void MyDoWork1(object sender, DoWorkEventArgs e){int number = 0;if(e != null){number = (int)e.Argument;}for (int i = 0; i <= 100; i++){worker.ReportProgress(i);Thread.Sleep(2000);//如果检测到点击了取消按钮，则退出当前循环if(true == worker.CancellationPending){e.Cancel = true;break;}}}//当后台操作已完成、被取消或引发异常时发生private void RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e){btn_start.IsEnabled = false;btn_start1.IsEnabled = false;btn_cancel.IsEnabled = false;}private void Backchanged(object sender, ProgressChangedEventArgs e){this.proBar.Value = e.ProgressPercentage;}private void btn_start_Click(object sender, RoutedEventArgs e){//如果支持取消，则为true；否则为false。 默认值为false。worker.WorkerSupportsCancellation = true;//支持进度更新，则为 true；否则为 false。worker.WorkerReportsProgress = true;//调用 RunWorkerAsync()时发生worker.DoWork += new DoWorkEventHandler(MyDoWork);//调用 ReportProgress(System.Int32)时发生worker.ProgressChanged += new ProgressChangedEventHandler(Backchanged);//当后台操作已完成、被取消或引发异常时发生worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(RunWorkerCompleted);if(!worker.IsBusy){//开始执行后台操作
                worker.RunWorkerAsync();}           }private void btn_start1_Click(object sender, RoutedEventArgs e){//如果支持取消，则为true；否则为false。 默认值为false。worker.WorkerSupportsCancellation = true;//支持进度更新，则为 true；否则为 false。worker.WorkerReportsProgress = true;//调用 RunWorkerAsync()时发生worker.DoWork += new DoWorkEventHandler(MyDoWork1);//调用 ReportProgress(System.Int32)时发生worker.ProgressChanged += new ProgressChangedEventHandler(Backchanged);if(!worker.IsBusy){//开始执行后台操作worker.RunWorkerAsync(100);}         }private void btn_cancel_Click(object sender, RoutedEventArgs e){if (worker.IsBusy && worker.WorkerSupportsCancellation){//请求取消挂起的后台操作
                worker.CancelAsync();}          }}
}