在Silverlight中正确取消图像下载

这绝对是可行的——我只是测试了一下以确保。下面是一个您可以尝试的快速课程:

public partial class Page : UserControl
{
    private WebClient m_oWC;
    public Page()
    {
        InitializeComponent();
        m_oWC = new WebClient();
        m_oWC.OpenReadCompleted += new OpenReadCompletedEventHandler(m_oWC_OpenReadCompleted);
    }

    void StartDownload(string sImageURL)
    {
        if (m_oWC.IsBusy)
        {
            m_oWC.CancelAsync();
        }
        m_oWC.OpenReadAsync(new Uri(sImageURL));
    }

    void m_oWC_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
    {
        BitmapImage oBMI = new BitmapImage();
        oBMI.SetSource(e.Result);
        imgMain.Source = oBMI;
    }
}