文件上传使用Webclient.Uploadfile中获取上传进度 [英] Getting the upload progress during file upload using Webclient.Uploadfile

问题描述

我有一个应用程序使用Web客户端的文件上传到服务器。 我想显示一个进度条，而在文件上传过程中。 我将如何实现这一目标？

I have an app that uploads files to server using the webclient. I'd like to display a progressbar while the file upload is in progress. How would I go about achieving this?

推荐答案

WebClient.UploadFileAsync 可以让你做到这一点。

WebClient.UploadFileAsync will allow you to do this.

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

...

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

请注意，该线程不会对上传挡住了，所以我建议使用：

Note that the thread won't block on Upload anymore, so I'd recommend using:

 webClient.UploadFileCompleted += WebClientUploadCompleted;

...

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

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