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How to use ExposeFunctionAsync method of Microsoft.Playwright.Core.BrowserContext class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Core.BrowserContext.ExposeFunctionAsync

Page.cs

Source:Page.cs

...551        public Task ExposeBindingAsync<T1, T2, T3, TResult>(string name, Func<BindingSource, T1, T2, T3, TResult> callback)552            => InnerExposeBindingAsync(name, (Delegate)callback);553        public Task ExposeBindingAsync<T1, T2, T3, T4, TResult>(string name, Func<BindingSource, T1, T2, T3, T4, TResult> callback)554            => InnerExposeBindingAsync(name, (Delegate)callback);555        public Task ExposeFunctionAsync(string name, Action callback)556            => ExposeBindingAsync(name, (BindingSource _) => callback());557        public Task ExposeFunctionAsync<T>(string name, Action<T> callback)558            => ExposeBindingAsync(name, (BindingSource _, T t) => callback(t));559        public Task ExposeFunctionAsync<TResult>(string name, Func<TResult> callback)560            => ExposeBindingAsync(name, (BindingSource _) => callback());561        public Task ExposeFunctionAsync<T, TResult>(string name, Func<T, TResult> callback)562            => ExposeBindingAsync(name, (BindingSource _, T t) => callback(t));563        public Task ExposeFunctionAsync<T1, T2, TResult>(string name, Func<T1, T2, TResult> callback)564            => ExposeBindingAsync(name, (BindingSource _, T1 t1, T2 t2) => callback(t1, t2));565        public Task ExposeFunctionAsync<T1, T2, T3, TResult>(string name, Func<T1, T2, T3, TResult> callback)566            => ExposeBindingAsync(name, (BindingSource _, T1 t1, T2 t2, T3 t3) => callback(t1, t2, t3));567        public Task ExposeFunctionAsync<T1, T2, T3, T4, TResult>(string name, Func<T1, T2, T3, T4, TResult> callback)568            => ExposeBindingAsync(name, (BindingSource _, T1 t1, T2 t2, T3 t3, T4 t4) => callback(t1, t2, t3, t4));569        public async Task<byte[]> PdfAsync(PagePdfOptions options = default)570        {571            if (!Context.IsChromium)572            {573                throw new NotSupportedException("This browser doesn't support this action.");574            }575            byte[] result = await _channel.PdfAsync(576                scale: options?.Scale,577                displayHeaderFooter: options?.DisplayHeaderFooter,578                headerTemplate: options?.HeaderTemplate,579                footerTemplate: options?.FooterTemplate,580                printBackground: options?.PrintBackground,581                landscape: options?.Landscape,...

BrowserContext.cs

Source:BrowserContext.cs

...168        public Task ExposeBindingAsync<T1, T2, T3, TResult>(string name, Func<BindingSource, T1, T2, T3, TResult> callback)169            => ExposeBindingAsync(name, (Delegate)callback);170        public Task ExposeBindingAsync<T1, T2, T3, T4, TResult>(string name, Func<BindingSource, T1, T2, T3, T4, TResult> callback)171            => ExposeBindingAsync(name, (Delegate)callback);172        public Task ExposeFunctionAsync(string name, Action callback)173            => ExposeBindingAsync(name, (BindingSource _) => callback());174        public Task ExposeFunctionAsync<T>(string name, Action<T> callback)175            => ExposeBindingAsync(name, (BindingSource _, T t) => callback(t));176        public Task ExposeFunctionAsync<TResult>(string name, Func<TResult> callback)177            => ExposeBindingAsync(name, (BindingSource _) => callback());178        public Task ExposeFunctionAsync<T, TResult>(string name, Func<T, TResult> callback)179            => ExposeBindingAsync(name, (BindingSource _, T t) => callback(t));180        public Task ExposeFunctionAsync<T1, T2, TResult>(string name, Func<T1, T2, TResult> callback)181            => ExposeBindingAsync(name, (BindingSource _, T1 t1, T2 t2) => callback(t1, t2));182        public Task ExposeFunctionAsync<T1, T2, T3, TResult>(string name, Func<T1, T2, T3, TResult> callback)183            => ExposeBindingAsync(name, (BindingSource _, T1 t1, T2 t2, T3 t3) => callback(t1, t2, t3));184        public Task ExposeFunctionAsync<T1, T2, T3, T4, TResult>(string name, Func<T1, T2, T3, T4, TResult> callback)185            => ExposeBindingAsync(name, (BindingSource _, T1 t1, T2 t2, T3 t3, T4 t4) => callback(t1, t2, t3, t4));186        public Task GrantPermissionsAsync(IEnumerable<string> permissions, BrowserContextGrantPermissionsOptions options = default)187            => Channel.GrantPermissionsAsync(permissions, options?.Origin);188        public async Task<IPage> NewPageAsync()189        {190            if (OwnerPage != null)191            {192                throw new PlaywrightException("Please use Browser.NewContextAsync()");193            }194            return (await Channel.NewPageAsync().ConfigureAwait(false)).Object;195        }196        public Task RouteAsync(string url, Action<IRoute> handler, BrowserContextRouteOptions options = default)197            => RouteAsync(new Regex(CombineUrlWithBase(url).GlobToRegex()), null, handler, options);198        public Task RouteAsync(Regex url, Action<IRoute> handler, BrowserContextRouteOptions options = default)...

ExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            await using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync();10            var context = await browser.NewContextAsync();11            await context.ExposeFunctionAsync("myFunction", (string arg) => Console.WriteLine(arg));12            var page = await context.NewPageAsync();13            await page.EvaluateAsync(@"() => {14                myFunction('Hello from Playwright');15            }");16        }17    }18}19Related posts: How to use the setDefaultNavigationTimeout() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the setDefaultTimeout() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the setGeolocation() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the setHTTPCredentials() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the setNetworkInterceptionEnabled() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the setOffline() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the setPermissions() method of the Microsoft.Playwright.Core.BrowserContext class in C# How to use the set

ExposeFunctionAsync

Using AI Code Generation

1var  browser = await  Playwright.CreateAsync().Chromium.LaunchAsync(new  LaunchOptions { Headless =  false  });2 var  context = await  browser.NewContextAsync();3 var  page = await  context.NewPageAsync();4await  page.ExposeFunctionAsync( "add" ,  ( int  a,  int  b) =>  a + b);5 var  result = await  page.EvaluateAsync< int >( "add(5, 6)" );6Console.WriteLine(result);7 await  browser.CloseAsync();8var  browser = await  Playwright.CreateAsync().Chromium.LaunchAsync(new  LaunchOptions { Headless =  false  });9 var  context = await  browser.NewContextAsync();10 var  page = await  context.NewPageAsync();11await  page.ExposeFunctionAsync( "add" ,  ( int  a,  int  b) =>  a + b);12 var  result = await  page.EvaluateAsync< int >( "add(5, 6)" );13Console.WriteLine(result);14 await  browser.CloseAsync();15var  browser = await  Playwright.CreateAsync().Chromium.LaunchAsync(new  LaunchOptions { Headless =  false  });16 var  context = await  browser.NewContextAsync();17 var  page = await  context.NewPageAsync();18await  page.ExposeFunctionAsync( "add" ,  ( int  a,  int  b) =>  a + b);19 var  result = await  page.EvaluateAsync< int >( "add(5, 6)" );20Console.WriteLine(result);21 await  browser.CloseAsync();22var  browser = await  Playwright.CreateAsync().Chromium.LaunchAsync(new  LaunchOptions { Headless =  false

ExposeFunctionAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4using Microsoft.Playwright.Core;5using Microsoft.Playwright.Transport;6using Microsoft.Playwright.Transport.Channels;7using Microsoft.Playwright.Transport.Protocol;8{9    {10        static async Task Main(string[] args)11        {12            var playwright = await Playwright.CreateAsync();13            var browser = await playwright.Chromium.LaunchAsync();14            var context = await browser.NewContextAsync();15            var page = await context.NewPageAsync();16            await context.ExposeFunctionAsync("myFunction", (string arg) =>17            {18                Console.WriteLine(arg);19                return "Hello from myFunction";20            });21            var result = await page.EvaluateAsync<string>("() => myFunction('Hello')");22            Console.WriteLine(result);23            await browser.CloseAsync();24        }25    }26}27using System;28using System.Threading.Tasks;29using Microsoft.Playwright;30using Microsoft.Playwright.Core;31using Microsoft.Playwright.Transport;32using Microsoft.Playwright.Transport.Channels;33using Microsoft.Playwright.Transport.Protocol;34{35    {36        static async Task Main(string[] args)37        {38            var playwright = await Playwright.CreateAsync();39            var browser = await playwright.Chromium.LaunchAsync();40            var context = await browser.NewContextAsync();41            var page = await context.NewPageAsync();42            await page.ExposeBindingAsync("myFunction", (string arg) =>43            {44                Console.WriteLine(arg);45                return "Hello from myFunction";46            });47            var result = await page.EvaluateAsync<string>("() => myFunction('Hello')");48            Console.WriteLine(result);49            await browser.CloseAsync();50        }51    }52}53using System;54using System.Threading.Tasks;55using Microsoft.Playwright;56using Microsoft.Playwright.Core;57using Microsoft.Playwright.Transport;58using Microsoft.Playwright.Transport.Channels;59using Microsoft.Playwright.Transport.Protocol;

ExposeFunctionAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            var browser = await playwright.Chromium.LaunchAsync();10            var page = await browser.NewPageAsync();11            await page.ExposeFunctionAsync("add", (int a, int b) => a + b);12            await page.ExposeBindingAsync("multiply", (BindingSource source, int a, int b) => a * b);13            var result = await page.EvaluateAsync<int>("async() => {return await add(5, 6);}");14            Console.WriteLine(result);15            var result1 = await page.EvaluateAsync<int>("async() => {return await multiply(5, 6);}");16            Console.WriteLine(result1);17        }18    }19}

ExposeFunctionAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Collections.Generic;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7{8    {9        static async Task Main(string[] args)10        {11            var playwright = await Playwright.CreateAsync();12            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions13            {14            });15            var context = await browser.NewContextAsync(new BrowserNewContextOptions16            {17            });18            var page = await context.NewPageAsync();19            await page.ExposeFunctionAsync("sum", (int a, int b) => a + b);20            int result = await page.EvaluateAsync<int>("sum(5, 6)");21            Console.WriteLine(result);22            await browser.CloseAsync();23        }24    }25}26using Microsoft.Playwright;27using System;28using System.Collections.Generic;29using System.Linq;30using System.Text;31using System.Threading.Tasks;32{33    {34        static async Task Main(string[] args)35        {36            var playwright = await Playwright.CreateAsync();37            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions38            {39            });40            var context = await browser.NewContextAsync(new BrowserNewContextOptions41            {42            });43            var page = await context.NewPageAsync();44            await page.ExposeBindingAsync("sum", (BindingSource source, int a, int b) => a + b);45            int result = await page.EvaluateAsync<int>("sum(5, 6)");46            Console.WriteLine(result);47            await browser.CloseAsync();48        }49    }50}51using Microsoft.Playwright;52using System;53using System.Collections.Generic;54using System.Linq;55using System.Text;

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.