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我无法使用剧作家自动化从浏览器下载文件。
我正在使用 C# 语言进行自动化。我已经使用 acceptDownload 创建了浏览器上下文，还提供了文件下载的目录路径。基本上代码被卡在 RunAndWaitForDownloadAsync 方法上，并且在那之后发生了注意事项。请在下面找到我用来下载文件的内容。

//While creating browser context
    
var playwright = await Playwright.CreateAsync();  
var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions()   
{ 
  Headless = false,   
  DownloadsPath = Directory.GetCurrentDirectory() 
});
    
var context = await browser.NewContextAsync(new BrowserNewContextOptions() { AcceptDownloads = true });
    
//For file download used below code.
    
var download = await _page.RunAndWaitForDownloadAsync(async () =>
{
   await _page.ClickAsync("#btnId");
}, new PageRunAndWaitForDownloadOptions() { Timeout = 10000 });
    
var tmpDir = Directory.GetCurrentDirectory();
string userPath = Path.Combine(tmpDir, "download.docx");
await download.SaveAsAsync(userPath);    
string path = await download.PathAsync();
   Assert.True(new FileInfo(path).Exists);
    
//One more option tried as below.
    
var downloadTask = _page.WaitForDownloadAsync();
await WhenAll(downloadTask, _page.ClickAsync("#btnSubmission")).ConfigureAwait(false);
var download = downloadTask.Result;
var tmpDir = Directory.GetCurrentDirectory();
string userPath = Path.Combine(tmpDir, "download.docx");
await download.SaveAsAsync(userPath);
string path = await download.PathAsync();
Assert.True(new FileInfo(path).Exists);
    
//Supporting method
public static async Task<T> WhenAll<T>(Task<T> task1, Task task2)
{
  await Task.WhenAll(task1, task2).ConfigureAwait(false);
  return task1.Result;
}
4

1 回答 1

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这是在 C# 中使用 Playwright 模拟下载文件的简化代码。
此示例中使用 Microsoft.Playwright NuGet 扩展。

private async void DownloadTest()
{
    const string url = "https://file-examples.com/index.php/sample-documents-download/sample-doc-download/";
    var PlayWright = await Playwright.CreateAsync();
    BrowserTypeLaunchOptions browserLaunchOptions = new BrowserTypeLaunchOptions() { Headless = false, Devtools = true };
    var Browser = await PlayWright.Chromium.LaunchAsync(browserLaunchOptions);
    BrowserNewContextOptions browserContextOptions = new BrowserNewContextOptions() { AcceptDownloads = true };
    var Context = await Browser.NewContextAsync(browserContextOptions);
    var Page = await Context.NewPageAsync();
    Page.Download += Page_Download;
    await Page.GotoAsync(url, new PageGotoOptions() { WaitUntil = WaitUntilState.NetworkIdle });
    await Page.EvaluateAsync("document.getElementsByTagName('table')[0].getElementsByTagName('a')[0].click();");
}

// Download files
private async void Page_Download(object sender, IDownload e)
{
    string fileName = e.SuggestedFilename;
    await e.SaveAsAsync(e.SuggestedFilename);
}
于 2021-08-23T14:41:44.663 回答