使用webclient.uploadFile上载文件时获取上载进度

WebClient.UploadFileAsync 允许你这样做。

WebClient webClient = new WebClient();
webClient.UploadFileAsync(address, fileName);
webClient.UploadProgressChanged += WebClientUploadProgressChanged;

…

void WebClientUploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
{
        Console.WriteLine("Upload {0}% complete. ", e.ProgressPercentage);
}

请注意,线程在上载时不再阻塞,因此我建议使用:

 webClient.UploadFileCompleted += WebClientUploadCompleted;

…

 void WebClientUploadCompleted(object sender, UploadFileCompletedEventArgs e)
 {
     // The upload is finished, clean up
 }

将事件处理程序添加到webclient.uploadProgressChanged并调用webclient.uploadFileAsync。

见 WebClient.UploadProgressChanged 例如文档。