使用Webclient.Uploadfile在文件上载期间获取上载进度

我有一个应用程序，使用webclient将文件上传到服务器。 我想在文件上传过程中显示进度条。 我将如何实现这一目标？

Answer 1

WebClient.UploadFileAsync将允许您执行此操作。

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，线程将不再阻止上传，所以我建议使用：

  webClient.UploadFileCompleted += WebClientUploadCompleted; 

…

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

Answer 2

将事件处理程序添加到WebClient.UploadProgressChanged并调用WebClient.UploadFileAsync。

有关示例，请参阅WebClient.UploadProgressChanged文档。