Question

我尝试使用CefSharp为网站制作一个小型下载工具。对于下载文件，我使用CefSharp中非常好的示例DownloadHandler。现在，我想在下载完成后做一些事情。我知道“ downloadItem ”具有“ IsComplete ”值。但是如果我在“ OnDownloadUpdated ”方法中添加这样的东西，那么东西永远不会被执行

        if (downloadItem.IsComplete) {
            //do stuff
        }

所以，我的问题是，我必须检查下载的项目是否已完成？

编辑：完成DownloadHandler：

    public class DownloadHandler : IDownloadHandler {

    public event EventHandler<DownloadItem> OnBeforeDownloadFired;
    public event EventHandler<DownloadItem> OnDownloadUpdatedFired;
    private bool stop;
    private DownloadWindow window;

    public void OnBeforeDownload(IBrowser browser, DownloadItem downloadItem, IBeforeDownloadCallback callback) {
        var handler = OnBeforeDownloadFired;
        if (handler != null) {
            handler(this, downloadItem);
        }

        if (!callback.IsDisposed) {
            using (callback) {
                callback.Continue(downloadItem.SuggestedFileName, showDialog: true);
            }
        }
        window = new DownloadWindow(downloadItem.TotalBytes, downloadItem.SuggestedFileName, this);
        window.Show();
    }

    public void OnDownloadUpdated(IBrowser browser, DownloadItem downloadItem, IDownloadItemCallback callback) {
        var handler = OnDownloadUpdatedFired;
        if (handler != null) {
            handler(this, downloadItem);
        }

        if (window != null) {
            window.UpdateProgress(downloadItem.ReceivedBytes);
        }

        if (stop) {
            callback.Cancel();
        }
    }

    public void StopDownload() {
        stop = true;
    }
}

Answer 1

您需要在OnDownloadUpdated方法中进行检查。

public void OnDownloadUpdated(IBrowser browser, DownloadItem downloadItem, IDownloadItemCallback callback)
{

    if (downloadItem.IsComplete || downloadItem.IsCancelled)
        {
         //do stuff
        }
}

别忘了，您的班级必须实施IDownloadHandler界面。一个好的调试策略是在这个方法中放置断点，以查看/理解何时被触发。

在CefSharp中完成下载

1 个答案: