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public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
AutoResetEvent downloadWaitEvent = new AutoResetEvent(false);
ThreadPool.QueueUserWorkItem(new WaitCallback(WorkMethod), downloadWaitEvent);
if (downloadWaitEvent.WaitOne(10000)) {
MessageBox.Show("AutoResetEvent-OK!");
} else {
MessageBox.Show("AutoResetEvent-Bad!");
}
}
private void WorkMethod(object stateInfo)
{
WebClient webClient = new WebClient();
webClient.DownloadDataCompleted += (s, e) => {
try {
if (!e.Cancelled && e.Error == null) {
}
} finally {
((AutoResetEvent)stateInfo).Set();
}
};
var imgUrl = "http://img4.cache.netease.com/m/2013/12/18/20131218104403bd5df.png";
webClient.DownloadDataAsync(new Uri(imgUrl));
}
}