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How to use QuerySelectorAsync method of PuppeteerSharp.Page class
Best Puppeteer-sharp code snippet using PuppeteerSharp.Page.QuerySelectorAsync
Scraping.cs
Source:Scraping.cs 
...24 var linkList = await page.QuerySelectorAllAsync("div.card a");25 foreach(var link in linkList)26 {27 var url = await (await link.GetPropertyAsync("href")).JsonValueAsync<string>();28 var title = await(await(await link.QuerySelectorAsync("h4")).GetPropertyAsync("innerText")).JsonValueAsync<string>();29 Console.WriteLine($"Found area: {title}");30 result.Add((url: url, title: title));31 }32 return result;33 }34 public static async Task<List<TaskInfo>> ScanTasks(Page page, IEnumerable<(string url, string title)> areas)35 {36 var result = new List<TaskInfo>();37 foreach (var area in areas)38 {39 if (area.title == "Databases") continue; // Does not support SQL queries.40 if (area.title == "Python") continue; // Does not support multiple choice.41 Console.WriteLine($"Opening area {area.title}");42 var response = await page.GoToAsync(area.url);43 var dummy = await page.WaitForSelectorAsync("div.arcade-map--topic");44 Console.WriteLine($"Scanning area {area.title}");45 var topicList = await page.QuerySelectorAllAsync("div.arcade-map--topic");46 foreach (var topic in topicList)47 {48 var span = await topic.QuerySelectorAsync("span");49 var topicTitle = await (await span.GetPropertyAsync("innerText")).JsonValueAsync<string>();50 var taskList = await topic.QuerySelectorAllAsync("div.arcade-map--topic-details a.arcade-map--task");51 foreach (var task in taskList)52 {53 var taskUrl = await (await task.GetPropertyAsync("href")).JsonValueAsync<string>();54 var solvedText = await (await task.GetPropertyAsync("className")).JsonValueAsync<string>();55 var solved = !solvedText.Contains("-current") && !solvedText.Contains("-not-solved");56 var taskTitle = await (await (await task.QuerySelectorAsync("h3")).GetPropertyAsync("innerText")).JsonValueAsync<string>();57 result.Add(new TaskInfo(area.url, area.title, topicTitle, taskUrl, taskTitle, solved));58 }59 }60 }61 return result;62 }63 public static async Task RetrieveTask(Page page, TaskInfo task)64 {65 Console.Write($"Reading {task.Task} of {task.Topic}.");66 await page.GoToAsync(task.TaskUrl);67 Console.Write(".");68 await page.SetViewportAsync(new ViewPortOptions() { Height = 100000, Width = 8000, HasTouch = false, IsMobile = false });69 Console.Write(".");70 var source = await page.WaitForSelectorAsync("div.view-lines");71 Console.Write(".");72 task.Source = await (await source.GetPropertyAsync("innerText")).JsonValueAsync<string>();73 Console.Write(".");74 await page.SetViewportAsync(new ViewPortOptions() { Height = 800, Width = 1600, HasTouch = false, IsMobile = false });75 Console.Write(".");76 var desc = await page.QuerySelectorAsync("div.markdown");77 Console.Write(".");78 task.Description = await (await desc.GetPropertyAsync("innerText")).JsonValueAsync<string>();79 Console.Write(".");80 var index = task.Description.IndexOf("[C#] Syntax Tips");81 if (index > 0) task.Description = task.Description.Substring(0, index);82 if (Source.TestExists(task, out var _)) return; // No need to read tests.83 task.Tests = new List<string>();84 var list = await page.QuerySelectorAllAsync("div.accordion");85 Console.Write(".");86 foreach (var item in list)87 {88 var btn = await item.QuerySelectorAsync("div.accordion--head");89 Console.Write(".");90 PuppeteerSharp.ElementHandle body;91 do92 {93 await btn.ClickAsync();94 Console.Write(".");95 body = await item.QuerySelectorAsync("div.accordion--body");96 Console.Write(".");97 if (body == null) await Task.Delay(100);98 } while (body == null);99 string test;100 var warning = await body.QuerySelectorAsync("div.task-tests--warning");101 Console.Write(".");102 if (warning != null)103 {104 // The test example is too big, download it.105 var name = await (await btn.GetPropertyAsync("innerText")).JsonValueAsync<string>();106 Console.Write(".");107 name = name.Replace(' ', '-') + ".json";108 name = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads", name);109 if (File.Exists(name)) File.Delete(name);110 var download = await warning.QuerySelectorAsync("div.button");111 Console.Write(".");112 await download.ClickAsync();113 Console.Write(".");114 int limit = 80;115 while (limit-- > 0 && !File.Exists(name))116 {117 await Task.Delay(250);118 }119 if (File.Exists(name))120 {121 test = ReadJsonTest(name);122 }123 else124 {125 test = "Failed to download test " + name;126 task.Failed = true;127 }128 }129 else130 {131 var input = await body.QuerySelectorAsync("pre.task-tests--value");132 if (input == null) break;133 test = await (await input.GetPropertyAsync("innerText")).JsonValueAsync<string>();134 Console.Write(".");135 input = await body.QuerySelectorAsync("pre.-answer");136 Console.Write(".");137 test += "\nExpected Output: " + await (await input.GetPropertyAsync("innerText")).JsonValueAsync<string>();138 Console.Write(".");139 }140 task.Tests.Add(test);141 }142 Console.WriteLine("");143 }144 private static string ReadJsonTest(string filename)145 {146 var jsonText = File.ReadAllText(filename);147 var json = JsonSerializer.Deserialize(jsonText, typeof(object)) as JsonElement?;148 StringBuilder result = new StringBuilder();149 json.Value.TryGetProperty("input", out var input);...
NavigateLogin.cs
Source:NavigateLogin.cs
...59 var response = await this.Page.GoToAsync(this.loginurl, new NavigationOptions60 {61 WaitUntil = new[] { WaitUntilNavigation.DOMContentLoaded },62 });63 this.elusername = await this.Page.QuerySelectorAsync("#user");64 this.elpassword = await this.Page.QuerySelectorAsync("input[name='password']");65 this.elbutton = await this.Page.QuerySelectorAsync("input.btn:nth-child(1)");66 if (this.elusername == null || this.elpassword == null || this.elbutton == null)67 {68 throw new Exception("NavigateLogin: Form input items missing.");69 }70 else71 {72 Console.WriteLine("Initialise Success.");73 }74 }75 private async Task ProcessAsync()76 {77 var usernameinput = await this.Page.QuerySelectorAsync("#user");78 await this.Page.EvaluateFunctionAsync($"yup => yup.value = '{this.Username}'", usernameinput);79 var passwordinput = await this.Page.QuerySelectorAsync("input[name='password']");80 await this.Page.EvaluateFunctionAsync($"mmhm => mmhm.value = '{this.Pasword}'", passwordinput);81 var form = await this.Page.QuerySelectorAsync("#loginForm");82 if (form == null)83 {84 throw new Exception("NavigateLogin: Page missing required login form.");85 }86 await this.Page.EvaluateFunctionAsync($"f => f.submit()", form);87 await this.Page.WaitForNavigationAsync(new NavigationOptions { WaitUntil = new[] { WaitUntilNavigation.Load } });88 await this.Page.SetRequestInterceptionAsync(true);89 this.Page.Request += this.DenyRequests;90 }91 private async Task Commit()92 {93 // finalise operations94 if (this.Page.Url == "http://www.property-guru.co.nz/gurux/render.php?action=main")95 {...
AuthIntegrationTests.cs
Source:AuthIntegrationTests.cs
...35 {36 var page = await browser.NewPageAsync();37 await page.GoToAsync($"{app.RootUri}signup");38 {39 var emailField = await page.MainFrame.QuerySelectorAsync("#Email");40 await emailField.TypeAsync(Email);41 var passwordField = await page.MainFrame.QuerySelectorAsync("#Password");42 await passwordField.TypeAsync(Password);43 var confirmPasswordField = await page.MainFrame.QuerySelectorAsync("#ConfirmPassword");44 await confirmPasswordField.TypeAsync(Password);45 var submitButton = await page.MainFrame.QuerySelectorAsync("input[type=submit]");46 await submitButton.ClickAsync();47 await page.MainFrame.WaitForNavigationAsync();48 }49 {50 using var scope = app.Services.CreateScope();51 var dbContext = scope.ServiceProvider.GetRequiredService<DatabaseContext>();52 var query = from user in dbContext.Users.AsQueryable() where user.Email == Email select user;53 var exists = await query.AnyAsync();54 exists.Should().Be(true);55 }56 {57 var cookies = await page.GetCookiesAsync();58 await page.DeleteCookieAsync(cookies);59 await page.GoToAsync($"{app.RootUri}login", waitUntil: WaitUntilNavigation.DOMContentLoaded);60 }61 {62 var emailField = await page.MainFrame.QuerySelectorAsync("#Email");63 await emailField.TypeAsync(Email);64 var passwordField = await page.MainFrame.QuerySelectorAsync("#Password");65 await passwordField.TypeAsync(Password);66 var submitButton = await page.MainFrame.QuerySelectorAsync("input[type=submit]");67 await submitButton.ClickAsync();68 await page.MainFrame.WaitForNavigationAsync();69 var url = new Uri(page.Url);70 url.AbsolutePath.Should().Be("/");71 }72 }73 }74}...
AvitoPostParser.cs
Source:AvitoPostParser.cs
...24 {25 ///todo try recognize captcha26 throw new HttpRequestException("Blocked");27 }28 var getPhoneNumberButton = await page.QuerySelectorAsync("span.item-phone-button-sub-text");29 if (getPhoneNumberButton == null)30 {31 return null;32 }33 await getPhoneNumberButton.ClickAsync();34 string phoneNumber = await GetPhoneNumber(page);35 string authorName = await GetAuthorName(page);36 return new PostInformation37 {38 Author = new Author39 {40 PhoneNumber = phoneNumber,41 Name = authorName42 }43 };44 }45 private async Task<string> GetAuthorName(PuppeteerSharp.Page page)46 {47 var sellerInfoName = await page.WaitForSelectorAsync(".seller-info-name.js-seller-info-name a").EvaluateFunctionAsync<string>("element => element.innerHTML");48 sellerInfoName = sellerInfoName.Trim();49 var sellerInfoValueElement = await page.QuerySelectorAsync("div.seller-info-label + div.seller-info-value");50 if (sellerInfoValueElement != null)51 {52 var sellerInfoValue = (await sellerInfoValueElement.EvaluateFunctionAsync<string>("element => element.innerHTML")).Trim();53 sellerInfoName += ": " + sellerInfoValue;54 }55 return sellerInfoName;56 }57 private async Task<string> GetPhoneNumber(PuppeteerSharp.Page page)58 {59 string phoneImage = await page.WaitForSelectorAsync("div[data-marker='phone-popup/content'] img[data-marker='phone-popup/phone-image']").EvaluateFunctionAsync<string>("element => element.src");60 string imageStr = phoneImage.Substring(phoneImage.IndexOf(",") + 1).Trim();61 byte[] imageByte = System.Convert.FromBase64String(imageStr);62 using (var engine = new TesseractEngine("./tessdata", "eng", EngineMode.Default))63 {...
Program.cs
Source:Program.cs
...33 // Height = 78034 //});3536 37 var element = await page.QuerySelectorAsync("#MainContent_ASPxRoundPanel2_WebChartControl1_IMG");38 //var element = await page.EvaluateExpressionAsync<ElementHandle>("document.getElementById('MainContent_ASPxRoundPanel2_WebChartControl1_IMG')");39 await element.ScreenshotAsync("gurka.png");4041 //await page.ScreenshotAsync("test.png", new ScreenshotOptions42 //{43 // Clip = new Clip()44 // {45 // X = 10,46 // Y = 10,47 // Height = 100,48 // Width = 10049 // }50 //});515253 var res= await page.EvaluateExpressionAsync<string>("document.getElementById('MainContent_signalpagedailycommentarytext').textContent");5455 element = await page.QuerySelectorAsync("#MainContent_signalpagedailycommentarytext");56 var apaaoa = (await element.GetPropertyAsync("textContent")).JsonValueAsync() ;57 //var res = await element.EvaluateFunctionAsync<string>("textContent");5859 await browser.CloseAsync();606162 //var client = new SwedishBullsClient();63 ////var s = await client.GetSnapshot("8TRA.ST");64 ////Console.WriteLine(s.SignalUpdate);65 ////Console.WriteLine(s.MarketOutlook);6667 //await client.Login("test@gmail.com", "test");6869 }
...
LoginAwaiter.cs
Source:LoginAwaiter.cs
...16 protected override async Task RunAsync()17 {18 byte[] oldBase64QRCode = new byte[0];19 var startDate = DateTime.Now;20 var rememberMeCheckbox = await page.QuerySelectorAsync(REMEMBER_ME_CHECKBOK);21 if (rememberMeCheckbox is null)22 return;23 var isChecked = (bool)(await (await rememberMeCheckbox.GetPropertyAsync("checked")).JsonValueAsync());24 if (!isChecked)25 await rememberMeCheckbox.ClickAsync();26 do27 {28 var qrCodeImage = await page.QuerySelectorAsync(QR_CODE_IMAGE);29 if (qrCodeImage is null)30 {31 var refreshImage = await page.QuerySelectorAsync(REFRESH_IMAGE);32 if (!(refreshImage is null))33 await refreshImage.ClickAsync();34 else35 break;36 continue;37 }38 var srcQrCode = await qrCodeImage.ScreenshotDataAsync();39 bool isEqual = Enumerable.SequenceEqual(srcQrCode, oldBase64QRCode);40 oldBase64QRCode = srcQrCode;41 if (!isEqual)42 {43 OnQRCodeChange.Invoke(this, new QrCodeChangedArgs(srcQrCode));44 }45 }...
PuppeteerExtensions.cs
Source:PuppeteerExtensions.cs
...16 });17 }18 public static async Task TypeAsync(this Frame frame, string selector, string text)19 {20 await (await frame.QuerySelectorAsync(selector)).TypeAsync(text);21 }22 public static async Task ClickAsync(this Frame frame, string selector)23 {24 await (await frame.QuerySelectorAsync(selector)).ClickAsync();25 }26 public static async Task WaitForTruth(this Page page, string script, WaitForFunctionOptions opts = null)27 {28 var jsHandle = await page.WaitForExpressionAsync(script, opts);29 await jsHandle.DisposeAsync();30 }31 public static async Task WaitForDocumentInteractiveState(this Page page, int? timeout = null)32 {33 await page.WaitForTruth("document.readyState === 'interactive' || document.readyState === 'complete'", new WaitForFunctionOptions { Timeout = timeout ?? page.Browser.DefaultWaitForTimeout });34 }35 }36}...
LogoutAwaiter.cs
Source:LogoutAwaiter.cs
...15 {16 var startDate = DateTime.Now;17 do18 {19 var menuElement = await page.QuerySelectorAsync(MENU_IMAGE);20 if(!(menuElement is null))21 {22 await menuElement.ClickAsync();23 var logoutElement = await page.QuerySelectorAsync(LOGOUT_IMAGE);24 if (!(logoutElement is null))25 {26 await logoutElement.ClickAsync();27 break;28 }29 }30 }31 while (DateTime.Now.Subtract(startDate) < timeout);32 Thread.Sleep(1000);33 }34 }35}...
QuerySelectorAsync
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });10 var page = await browser.NewPageAsync();11 var element = await page.QuerySelectorAsync("input");12 await page.ScreenshotAsync("example.png");13 await browser.CloseAsync();14 }15 }16}17public Task<ElementHandle[]> QuerySelectorAllAsync(string selector)18using System;19using System.Threading.Tasks;20using PuppeteerSharp;21{22 {23 static async Task Main(string[] args)24 {25 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);26 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });27 var page = await browser.NewPageAsync();28 var elements = await page.QuerySelectorAllAsync("input");29 await page.ScreenshotAsync("example.png");30 await browser.CloseAsync();31 }32 }33}34public Task<ElementHandle> QuerySelectorXPathAsync(string selector)
QuerySelectorAsync
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });10 var page = await browser.NewPageAsync();11 var element = await page.QuerySelectorAsync("input[name='q']");12 Console.WriteLine(element);13 await browser.CloseAsync();14 }15 }16}
QuerySelectorAsync
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 var options = new LaunchOptions { Headless = false };9 using (var browser = await Puppeteer.LaunchAsync(options))10 using (var page = await browser.NewPageAsync())11 {12 await page.QuerySelectorAsync("input[name='q']");13 }14 }15 }16}17using System;18using System.Threading.Tasks;19using PuppeteerSharp;20{21 {22 static async Task Main(string[] args)23 {24 var options = new LaunchOptions { Headless = false };25 using (var browser = await Puppeteer.LaunchAsync(options))26 using (var page = await browser.NewPageAsync())27 {28 var elements = await page.QuerySelectorAllAsync("input[name='q']");29 }30 }31 }32}33using System;34using System.Threading.Tasks;35using PuppeteerSharp;36{37 {38 static async Task Main(string[] args)39 {40 var options = new LaunchOptions { Headless = false };41 using (var browser = await Puppeteer.LaunchAsync(options))42 using (var page = await browser.NewPageAsync())43 {44 var element = await page.QuerySelectorAsync("input[name='q']");45 var value = await element.GetAttributeAsync("name");46 Console.WriteLine(value);47 }48 }49 }50}51using System;52using System.Threading.Tasks;53using PuppeteerSharp;
QuerySelectorAsync
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 var options = new LaunchOptions { Headless = false };9 using (var browser = await Puppeteer.LaunchAsync(options))10 {11 using (var page = await browser.NewPageAsync())12 {13 var elementHandle = await page.QuerySelectorAsync("input[name='q']");14 await elementHandle.TypeAsync("PuppeteerSharp");15 await page.Keyboard.PressAsync("Enter");16 await page.WaitForSelectorAsync("a[href='
QuerySelectorAsync
Using AI Code Generation
1var element = await page.QuerySelectorAsync("input[name='q']");2await element.TypeAsync("puppeteer");3await element.PressAsync("Enter");4await page.WaitForNavigationAsync();5var h3 = await page.QuerySelectorAsync("h3");6var title = await h3.EvaluateFunctionAsync<string>("node => node.innerText");7Console.WriteLine(title);8await page.WaitForSelectorAsync("a[href='
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Most used method in Page
- FrameManagerGetFrames
- workersValuesToArray
- PopupGetInvocationList
- clientDisconnected
- SetGeolocationAsync
- SetDragInterceptionAsync
- MetricsAsync
- TapAsync
- QuerySelectorAsync
- QuerySelectorAllAsync
- QuerySelectorAllHandleAsync
- XPathAsync
- EvaluateExpressionHandleAsync
- EvaluateFunctionHandleAsync
- EvaluateOnNewDocumentAsync
- EvaluateFunctionOnNewDocumentAsync
- EvaluateExpressionOnNewDocumentAsync
- QueryObjectsAsync
- SetRequestInterceptionAsync
- SetOfflineModeAsync
- EmulateNetworkConditionsAsync
- GetCookiesAsync
- SetCookieAsync
- DeleteCookieAsync
- AddScriptTagAsync
- AddStyleTagAsync
- ExposeFunctionAsync
- TResult
- GetContentAsync
- SetContentAsync
- GoToAsync
- PdfAsync
- PdfStreamAsync
- PdfDataAsync
- SetJavaScriptEnabledAsync
- SetBypassCSPAsync
- EmulateMediaAsync
- EmulateMediaTypeAsync
- EmulateMediaFeaturesAsync
- SetViewportAsync
- EmulateAsync
- ScreenshotAsync
- ScreenshotStreamAsync
- ScreenshotBase64Async
- ScreenshotDataAsync
- GetTitleAsync
- CloseAsync
- SetCacheEnabledAsync
- ClickAsync
- HoverAsync
- FocusAsync
- TypeAsync
- EvaluateExpressionAsync
- EvaluateFunctionAsync
- SetUserAgentAsync
- SetExtraHttpHeadersAsync
- AuthenticateAsync
- ReloadAsync
- SelectAsync
- WaitForTimeoutAsync
- WaitForFunctionAsync
- WaitForExpressionAsync
- WaitForSelectorAsync
- WaitForXPathAsync
- WaitForNavigationAsync
- WaitForNetworkIdleAsync
- Evaluate
- requestEventListener
- responseEventListener
- Cleanup
- WaitForRequestAsync
- WaitForResponseAsync
- WaitForFileChooserAsync
- GoBackAsync
- GoForwardAsync
- SetBurstModeOffAsync
- BringToFrontAsync
- EmulateVisionDeficiencyAsync
- EmulateTimezoneAsync
- EmulateIdleStateAsync
- EmulateCPUThrottlingAsync
- OnPopup
- InitializeAsync
- GoAsync
- ClientMessageReceived
- OnDetachedFromTarget
- OnTargetCrashed
- EmitMetrics
- HandleException
- OnDialog
- Dispose
- DisposeAsync
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