How to use Evaluate method of PuppeteerSharp.Page class
Best Puppeteer-sharp code snippet using PuppeteerSharp.Page.Evaluate
Methods.cs
Source:Methods.cs 
...20 data.Logger.LogHeader();21 var elemScript = GetElementScript(findBy, identifier, index);22 var frame = GetFrame(data);23 var script = elemScript + $".setAttribute('{attributeName}', '{value}');";24 await frame.EvaluateExpressionAsync(script);25 data.Logger.Log($"Set value {value} of attribute {attributeName} by executing {script}", LogColors.DarkSalmon);26 }27 [Block("Types text in an input field", name = "Type")]28 public static async Task PuppeteerTypeElement(BotData data, FindElementBy findBy, string identifier, int index,29 string text, int timeBetweenKeystrokes = 0)30 {31 data.Logger.LogHeader();32 var frame = GetFrame(data);33 var elem = await GetElement(frame, findBy, identifier, index);34 await elem.TypeAsync(text, new PuppeteerSharp.Input.TypeOptions { Delay = timeBetweenKeystrokes });35 data.Logger.Log($"Typed {text}", LogColors.DarkSalmon);36 }37 [Block("Types text in an input field with human-like random delays", name = "Type Human")]38 public static async Task PuppeteerTypeElementHuman(BotData data, FindElementBy findBy, string identifier, int index,39 string text)40 {41 data.Logger.LogHeader();42 var frame = GetFrame(data);43 var elem = await GetElement(frame, findBy, identifier, index);44 foreach (var c in text)45 {46 await elem.TypeAsync(c.ToString());47 await Task.Delay(data.Random.Next(100, 300)); // Wait between 100 and 300 ms (average human type speed is 60 WPM ~ 360 CPM)48 }49 data.Logger.Log($"Typed {text}", LogColors.DarkSalmon);50 }51 [Block("Clicks an element", name = "Click")]52 public static async Task PuppeteerClick(BotData data, FindElementBy findBy, string identifier, int index,53 PuppeteerSharp.Input.MouseButton mouseButton = PuppeteerSharp.Input.MouseButton.Left, int clickCount = 1,54 int timeBetweenClicks = 0)55 {56 data.Logger.LogHeader();57 var frame = GetFrame(data);58 var elem = await GetElement(frame, findBy, identifier, index);59 await elem.ClickAsync(new PuppeteerSharp.Input.ClickOptions { Button = mouseButton, ClickCount = clickCount, Delay = timeBetweenClicks });60 data.Logger.Log($"Clicked {clickCount} time(s) with {mouseButton} button", LogColors.DarkSalmon);61 }62 [Block("Submits a form", name = "Submit")]63 public static async Task PuppeteerSubmit(BotData data, FindElementBy findBy, string identifier, int index)64 {65 data.Logger.LogHeader();66 var elemScript = GetElementScript(findBy, identifier, index);67 var frame = GetFrame(data);68 var script = elemScript + ".submit();";69 await frame.EvaluateExpressionAsync(script);70 data.Logger.Log($"Submitted the form by executing {script}", LogColors.DarkSalmon);71 }72 [Block("Selects a value in a select element", name = "Select")]73 public static async Task PuppeteerSelect(BotData data, FindElementBy findBy, string identifier, int index, string value)74 {75 data.Logger.LogHeader();76 var frame = GetFrame(data);77 var elem = await GetElement(frame, findBy, identifier, index);78 await elem.SelectAsync(value);79 data.Logger.Log($"Selected value {value}", LogColors.DarkSalmon);80 }81 [Block("Selects a value by index in a select element", name = "Select by Index")]82 public static async Task PuppeteerSelectByIndex(BotData data, FindElementBy findBy, string identifier, int index, int selectionIndex)83 {84 data.Logger.LogHeader();85 var frame = GetFrame(data);86 var elemScript = GetElementScript(findBy, identifier, index);87 var script = elemScript + $".getElementsByTagName('option')[{selectionIndex}].value;";88 var value = (await frame.EvaluateExpressionAsync(script)).ToString();89 var elem = await GetElement(frame, findBy, identifier, index);90 await elem.SelectAsync(value);91 data.Logger.Log($"Selected value {value}", LogColors.DarkSalmon);92 }93 [Block("Selects a value by text in a select element", name = "Select by Text")]94 public static async Task PuppeteerSelectByText(BotData data, FindElementBy findBy, string identifier, int index, string text)95 {96 data.Logger.LogHeader();97 var frame = GetFrame(data);98 var elemScript = GetElementScript(findBy, identifier, index);99 var script = $"el={elemScript};for(let i=0;i<el.options.length;i++){{if(el.options[i].text=='{text}'){{el.selectedIndex = i;break;}}}}";100 await frame.EvaluateExpressionAsync(script);101 data.Logger.Log($"Selected text {text}", LogColors.DarkSalmon);102 }103 [Block("Gets the value of an attribute of an element", name = "Get Attribute Value")]104 public static async Task<string> PuppeteerGetAttributeValue(BotData data, FindElementBy findBy, string identifier, int index,105 string attributeName = "innerText")106 {107 data.Logger.LogHeader();108 var elemScript = GetElementScript(findBy, identifier, index);109 var frame = GetFrame(data);110 var script = $"{elemScript}.{attributeName};";111 var value = await frame.EvaluateExpressionAsync<string>(script);112 data.Logger.Log($"Got value {value} of attribute {attributeName} by executing {script}", LogColors.DarkSalmon);113 return value;114 }115 [Block("Gets the values of an attribute of multiple elements", name = "Get Attribute Value All")]116 public static async Task<List<string>> PuppeteerGetAttributeValueAll(BotData data, FindElementBy findBy, string identifier,117 string attributeName = "innerText")118 {119 data.Logger.LogHeader();120 var elemScript = GetElementsScript(findBy, identifier);121 var frame = GetFrame(data);122 var script = $"Array.prototype.slice.call({elemScript}).map((item) => item.{attributeName})";123 var values = await frame.EvaluateExpressionAsync<string[]>(script);124 data.Logger.Log($"Got {values.Length} values for attribute {attributeName} by executing {script}", LogColors.DarkSalmon);125 return values.ToList();126 }127 [Block("Checks if an element is currently being displayed on the page", name = "Is Displayed")]128 public static async Task<bool> PuppeteerIsDisplayed(BotData data, FindElementBy findBy, string identifier, int index)129 {130 data.Logger.LogHeader();131 var elemScript = GetElementScript(findBy, identifier, index);132 var frame = GetFrame(data);133 var script = $"window.getComputedStyle({elemScript}).display !== 'none';";134 var displayed = await frame.EvaluateExpressionAsync<bool>(script);135 data.Logger.Log($"Found out the element is{(displayed ? "" : " not")} displayed by executing {script}", LogColors.DarkSalmon);136 return displayed;137 }138 [Block("Checks if an element exists on the page", name = "Exists")]139 public static async Task<bool> PuppeteerExists(BotData data, FindElementBy findBy, string identifier, int index)140 {141 data.Logger.LogHeader();142 var elemScript = GetElementScript(findBy, identifier, index);143 var frame = GetFrame(data);144 var script = $"window.getComputedStyle({elemScript}).display !== 'none';";145 try146 {147 var displayed = await frame.EvaluateExpressionAsync<bool>(script);148 data.Logger.Log("The element exists", LogColors.DarkSalmon);149 return true;150 }151 catch152 {153 data.Logger.Log("The element does not exist", LogColors.DarkSalmon);154 return false;155 }156 }157 [Block("Uploads one or more files to the selected element", name = "Upload Files")]158 public static async Task PuppeteerUploadFiles(BotData data, FindElementBy findBy, string identifier, int index, List<string> filePaths)159 {160 data.Logger.LogHeader();161 var frame = GetFrame(data);...
SaveWebPage.xaml.cs
Source:SaveWebPage.xaml.cs
...101 PuppeteerSharp.PdfOptions pdfOptions = new PuppeteerSharp.PdfOptions();102 pdfOptions.DisplayHeaderFooter = false; //æ¯å¦æ¾ç¤ºé¡µç页è103 pdfOptions.FooterTemplate = ""; //页èææ¬104105 var width = await page.EvaluateFunctionAsync<int>("function getWidth(){return document.body.scrollWidth}");106 var height = await page.EvaluateFunctionAsync<int>("function getHeight(){return document.body.scrollHeight}");107108 pdfOptions.Width = $"{width}px";109 pdfOptions.Height = $"{height}px";110111 pdfOptions.HeaderTemplate = ""; //页çææ¬112 pdfOptions.Landscape = false; //çº¸å¼ æ¹å false-åç´ true-æ°´å¹³113 pdfOptions.MarginOptions = new PuppeteerSharp.Media.MarginOptions() { Bottom = "0px", Left = "0px", Right = "0px", Top = "0px" }; //çº¸å¼ è¾¹è·ï¼éè¦è®¾ç½®å¸¦åä½çå¼ï¼é»è®¤å¼æ¯None114 pdfOptions.Scale = 1m; //PDF缩æ¾ï¼ä»0-1115 pdfOptions.PrintBackground = true;116117 var fileName = Environment.CurrentDirectory + $"\\download\\{await page.GetTitleAsync()}.pdf";118119 if (System.IO.File.Exists(fileName))120 {
...
Get-ScraperMobileVikings.cs
Source:Get-ScraperMobileVikings.cs
...65 decimal credits;66 try {67 var creditField = await page.WaitForSelectorAsync(68 "body > div:nth-child(1) > div:nth-child(3) > div > div > main > div > section > div > section > section.MvSection.balanceItemSection > div > div > div:nth-child(2) > strong");69 var creditText = await creditField.EvaluateFunctionAsync<string>("e => e.innerText");70 var creditMatch = Regex.Match(creditText, @"^[^\d]*(\d+)[,\.](\d+)$");71 if (creditMatch.Success) {72 creditText = creditMatch.Groups[1].Value + CultureInfo.InvariantCulture.NumberFormat.NumberDecimalSeparator + (creditMatch.Groups[2].Value ?? "0");73 credits = decimal.Parse(creditText, CultureInfo.InvariantCulture.NumberFormat);74 } else {75 throw new Exception($"Credits not found ({creditText})");76 }77 } catch (PuppeteerSharp.WaitTaskTimeoutException) {78 var creditField = await page.WaitForSelectorAsync(79 "body > div:nth-child(1) > div:nth-child(3) > div > div > main > div > section > div > section > section");80 var creditText = await creditField.EvaluateFunctionAsync<string>("e => e.innerText");81 if (creditText.Contains("Geen\nbelwaarde"))82 credits = 0m;83 else84 throw new Exception($"Credits not found (No credits left?)");85 }8687 // Get points88 System.Threading.Thread.Sleep(3000);89 decimal? points = null;90 if (!DontIncludePoints)91 {92 await page.GoToAsync("https://mobilevikings.be/en/my-viking/viking-points");93 Match pointMatch = null;94 string pointText = "";95 for (int i = 0; i < 10 && (pointMatch == null || !pointMatch.Success); i++)96 {97 System.Threading.Thread.Sleep(1000);98 var pointField = await page.WaitForSelectorAsync(99 "body > div:nth-child(1) > div:nth-child(3) > div > div > main > div > section.vikingPointsView__header.vikingPointsViewHeader > div.vikingPointsViewHeader__details.vikingPointsViewHeaderItem.available > div");100 pointText = await pointField.EvaluateFunctionAsync<string>("e => e.innerText");101 pointMatch = Regex.Match(pointText, @"^[^\d]*(\d+)[,\.](\d+)$");102 }103 if (pointMatch.Success) {104 pointText = pointMatch.Groups[1].Value + CultureInfo.InvariantCulture.NumberFormat.NumberDecimalSeparator + (pointMatch.Groups[2].Value ?? "0");105 points = decimal.Parse(pointText, CultureInfo.InvariantCulture.NumberFormat);106 } else {107 throw new Exception($"Points not found ({pointText})");108 }109 }110111 // Bundle112 return new MobileVikings { 113 Credits = credits,114 Points = points
...
GeneratePdf.cs
Source:GeneratePdf.cs
...74 DeviceScaleFactor = 1,75 Width = width,76 Height = 108077 });78 // dimensions = await page.EvaluateExpressionAsync<string>(jsWidth);79 await page.EvaluateExpressionHandleAsync("document.fonts.ready"); // Wait for fonts to be loaded. Omitting this might result in no text rendered in pdf.80 // use the screen mode for viewing the web page81 await page.EmulateMediaTypeAsync(PuppeteerSharp.Media.MediaType.Screen);82 // define some options83 var options = new PdfOptions()84 {85 Width = width,86 Height = 1080,87 Format = PuppeteerSharp.Media.PaperFormat.Letter,88 DisplayHeaderFooter = false,89 PrintBackground = printBackground90 };91 // throws an error if margin is less than 1092 if (margin >= 10)93 {...
AvitoPostParser.cs
Source:AvitoPostParser.cs
...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 {64 using (var memoryStream = new MemoryStream(imageByte))65 {66 var file = Pix.LoadFromMemory(memoryStream.ToArray());67 var page1 = engine.Process(file);68 return page1.GetText().Trim();69 }70 }71 }72 }73}...
test vueJS - Example1 - Refresh Top System Processes.csx
Source:test vueJS - Example1 - Refresh Top System Processes.csx
...71async Task waitForProgramEnd(){72 /*73 This stuff keeps the browser open until our program is done.74 */75 await page.EvaluateFunctionAsync(@"76 ()=> {77 window.programDone = false;78 }79 ");80 await page.WaitForExpressionAsync("window.programDone === true", new WaitForFunctionOptions{81 Timeout = 0 // disable the timeout82 });83 Console.WriteLine("Program finished triggered");84 // program is done so close everything out85 await page.CloseAsync();86 await browser.CloseAsync();87}88await waitForProgramEnd();...
test vueJS.csx
Source:test vueJS.csx
...50async Task waitForProgramEnd(){51 /*52 This stuff keeps the browser open until our program is done.53 */54 await page.EvaluateFunctionAsync(@"55 ()=> {56 window.programDone = false;57 }58 ");59 await page.WaitForExpressionAsync("window.programDone === true", new WaitForFunctionOptions{60 Timeout = 0 // disable timeout61 });62 Console.WriteLine("Program finished triggered");63 // program is done so close everything out64 await page.CloseAsync();65 await browser.CloseAsync();66}67await waitForProgramEnd();...
InstagramService.cs
Source:InstagramService.cs
...35 description: child.alt, 36 src: child.src37 }38 })";39 var images = await page.EvaluateExpressionAsync<Image[]>(jsSelectAllAnchors);40 result = images;41 await page.CloseAsync();42 }43 }44 catch 45 {46 }47 return result;48 }49 }50}...
Evaluate
Using AI Code Generation
1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 });12 var page = await browser.NewPageAsync();13 var title = await page.EvaluateFunctionAsync<string>("() => document.title");14 Console.WriteLine(title);15 await browser.CloseAsync();16 }17 }18}19using PuppeteerSharp;20using System;21using System.Threading.Tasks;22{23 {24 static async Task Main(string[] args)25 {26 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);27 var browser = await Puppeteer.LaunchAsync(new LaunchOptions28 {29 });30 var page = await browser.NewPageAsync();31 var title = await page.EvaluateFunctionAsync<string>("() => document.title");32 Console.WriteLine(title);33 await browser.CloseAsync();34 }35 }36}37using PuppeteerSharp;38using System;39using System.Threading.Tasks;40{41 {42 static async Task Main(string[] args)43 {44 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);45 var browser = await Puppeteer.LaunchAsync(new LaunchOptions46 {47 });48 var page = await browser.NewPageAsync();49 var title = await page.EvaluateExpressionAsync<string>("document.title");50 Console.WriteLine(title);51 await browser.CloseAsync();52 }53 }54}55using PuppeteerSharp;56using System;57using System.Threading.Tasks;58{59 {60 static async Task Main(string[] args)61 {62 await new BrowserFetcher().DownloadAsync(BrowserFetcher.Default
Evaluate
Using AI Code Generation
1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 public static async Task Main(string[] args)6 {7 var browser = await Puppeteer.LaunchAsync(new LaunchOptions8 {9 });10 var page = await browser.NewPageAsync();11 await page.EvaluateExpressionAsync(@"document.querySelector('input').value = 'PuppeteerSharp'");12 await page.ScreenshotAsync("example.png");13 await browser.CloseAsync();14 }15}16using PuppeteerSharp;17using System;18using System.Threading.Tasks;19{20 public static async Task Main(string[] args)21 {22 var browser = await Puppeteer.LaunchAsync(new LaunchOptions23 {24 });25 var page = await browser.NewPageAsync();26 var elementHandle = await page.EvaluateHandleAsync(@"() => {27 return document.querySelector('input');28 }");29 await elementHandle.AsElement().SetPropertyAsync("value", "PuppeteerSharp");30 await page.ScreenshotAsync("example.png");31 await browser.CloseAsync();32 }33}34using PuppeteerSharp;35using System;36using System.Threading.Tasks;37{38 public static async Task Main(string[] args)39 {40 var browser = await Puppeteer.LaunchAsync(new LaunchOptions41 {42 });43 var page = await browser.NewPageAsync();44 await page.EvaluateExpressionAsync(@"document.querySelector('input').value = 'PuppeteerSharp'");45 var result = await page.QuerySelectorAsync("input");46 Console.WriteLine("Input value: " + await result.EvaluateFunctionAsync<string>("e => e.value"));47 await browser.CloseAsync();48 }49}50using PuppeteerSharp;51using System;52using System.Threading.Tasks;53{54 public static async Task Main(string[] args)55 {
Evaluate
Using AI Code Generation
1var page = await browser.NewPageAsync();2var title = await page.EvaluateExpressionAsync<string>("document.title");3Console.WriteLine(title);4var page = await browser.NewPageAsync();5var title = await page.EvaluateFunctionAsync<string>("() => document.title");6Console.WriteLine(title);7var page = await browser.NewPageAsync();8var title = await page.EvaluateFunctionAsync<string>("() => document.title");9Console.WriteLine(title);10var page = await browser.NewPageAsync();11var title = await page.EvaluateFunctionAsync<string>("() => document.title");12Console.WriteLine(title);13var page = await browser.NewPageAsync();14var title = await page.EvaluateFunctionAsync<string>("() => document.title");15Console.WriteLine(title);16var page = await browser.NewPageAsync();17var title = await page.EvaluateFunctionAsync<string>("() => document.title");18Console.WriteLine(title);19var page = await browser.NewPageAsync();20var title = await page.EvaluateFunctionAsync<string>("() => document.title");21Console.WriteLine(title);22var page = await browser.NewPageAsync();23var title = await page.EvaluateFunctionAsync<string>("() => document.title");24Console.WriteLine(title);25var page = await browser.NewPageAsync();
Evaluate
Using AI Code Generation
1var page = await browser.NewPageAsync();2await page.SetViewportAsync(new ViewPortOptions { Width = 1366, Height = 768 });3await page.EvaluateExpressionAsync<string>("document.title");4await page.CloseAsync();5var page = await browser.NewPageAsync();6await page.SetViewportAsync(new ViewPortOptions { Width = 1366, Height = 768 });7await page.MainFrame.EvaluateExpressionAsync<string>("document.title");8await page.CloseAsync();9var page = await browser.NewPageAsync();10await page.SetViewportAsync(new ViewPortOptions { Width = 1366, Height = 768 });11var elementHandle = await page.QuerySelectorAsync("input");12await elementHandle.EvaluateExpressionAsync<string>("document.title");13await page.CloseAsync();14var page = await browser.NewPageAsync();15await page.SetViewportAsync(new ViewPortOptions { Width = 1366, Height = 768 });16var jsHandle = await page.EvaluateExpressionAsync("document.title");17await jsHandle.EvaluateExpressionAsync<string>("document.title");18await page.CloseAsync();19var page = await browser.NewPageAsync();20await page.SetViewportAsync(new ViewPortOptions { Width = 1366, Height = 768 });21await page.EvaluateExpressionAsync<string>("document.title");22await page.CloseAsync();23var page = await browser.NewPageAsync();24await page.SetViewportAsync(new ViewPortOptions { Width = 1366, Height = 768 });25await page.MainFrame.EvaluateExpressionAsync<string>("document.title");26await page.CloseAsync();
Evaluate
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 public static async Task Run()7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))10 using (var page = await browser.NewPageAsync())11 {12 var title = await page.EvaluateFunctionAsync<string>("() => document.title");13 Console.WriteLine(title);14 }15 }16 }17}18using System;19using System.Threading.Tasks;20using PuppeteerSharp;21{22 {23 public static async Task Run()24 {25 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);26 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))27 using (var page = await browser.NewPageAsync())28 {29 var frame = page.MainFrame;30 var title = await frame.EvaluateFunctionAsync<string>("() => document.title");31 Console.WriteLine(title);32 }33 }34 }35}36using System;37using System.Threading.Tasks;38using PuppeteerSharp;39{40 {41 public static async Task Run()42 {43 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);44 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))45 using (var page = await browser.NewPageAsync())46 {47 var frame = page.MainFrame;48 var title = await frame.EvaluateFunctionAsync<string>("() => document.title");49 Console.WriteLine(title);50 }51 }52 }53}54using System;55using System.Threading.Tasks;56using PuppeteerSharp;57{58 {59 public static async Task Run()60 {
Evaluate
Using AI Code Generation
1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3});4var page = await browser.NewPageAsync();5await page.GoToAsync(url);6var result = await page.EvaluateExpressionAsync<string>("document.title");7Console.WriteLine(result);8await browser.CloseAsync();9var browser = await Puppeteer.LaunchAsync(new LaunchOptions10{11});12var page = await browser.NewPageAsync();13await page.GoToAsync(url);
Evaluate
Using AI Code Generation
1var page = await browser.NewPageAsync();2var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");3var page = await browser.NewPageAsync();4var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");5var page = await browser.NewPageAsync();6var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");7var page = await browser.NewPageAsync();8var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");9var page = await browser.NewPageAsync();10var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");11var page = await browser.NewPageAsync();12var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");13var page = await browser.NewPageAsync();14var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");15var page = await browser.NewPageAsync();16var result = await page.EvaluateFunctionAsync<int>("() => 1 + 2");
Evaluate
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using System.Threading;5using System.Linq;6{7 {8 static void Main(string[] args)9 {10 var task = MainAsync(args);11 task.Wait();12 }13 static async Task MainAsync(string[] args)14 {15 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);16 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });17 var page = await browser.NewPageAsync();18 var result = await page.EvaluateExpressionAsync<string>("document.title");19 Console.WriteLine(result);20 await browser.CloseAsync();21 }22 }23}24public Task<T> EvaluateExpressionAsync<T>(string pageFunction, object[] args = null, CancellationToken cancellationToken = default)25public Task<T> EvaluateFunctionAsync<T>(string pageFunction, object[] args = null, CancellationToken cancellationToken = default)
Evaluate
Using AI Code Generation
1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 var browser = await Puppeteer.LaunchAsync(new LaunchOptions9 {10 });11 var page = await browser.NewPageAsync();12 var title = await page.EvaluateFunctionAsync<string>("() => document.title");13 Console.WriteLine(title);14 await page.ScreenshotAsync("example.png");15 await browser.CloseAsync();16 }17 }18}19function getNumber() {20 return 42;21}22using System;23using System.Threading.Tasks;24using PuppeteerSharp;25{26 {27 static async Task Main(string[] args)28 {29 var browser = await Puppeteer.LaunchAsync(new LaunchOptions30 {31 });32 var page = await browser.NewPageAsync();33 var number = await page.EvaluateFunctionAsync<int>("getNumber");34 Console.WriteLine(number);35 await page.ScreenshotAsync("example.png");36 await browser.CloseAsync();37 }38 }39}40function getNumber() {41 return 42;42}43using System;44using System.Threading.Tasks;45using PuppeteerSharp;46{
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