How to use OnMessage method of Microsoft.Playwright.Transport.Channels.ChannelBase class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Transport.Channels.ChannelBase.OnMessage

FrameChannel.cs

Source:FrameChannel.cs

...38        {39        }40        internal event EventHandler<FrameNavigatedEventArgs> Navigated;41        internal event EventHandler<FrameChannelLoadStateEventArgs> LoadState;42        internal override void OnMessage(string method, JsonElement? serverParams)43        {44            switch (method)45            {46                case "navigated":47                    var e = serverParams?.ToObject<FrameNavigatedEventArgs>(Connection.DefaultJsonSerializerOptions);48                    if (serverParams.Value.TryGetProperty("newDocument", out var documentElement))49                    {50                        e.NewDocument = documentElement.ToObject<NavigateDocument>(Connection.DefaultJsonSerializerOptions);51                    }52                    Navigated?.Invoke(this, e);53                    break;54                case "loadstate":55                    LoadState?.Invoke(56                        this,...

Connection.cs

Source:Connection.cs

...63        public ConcurrentDictionary<string, IChannelOwner> Objects { get; } = new();64        internal AsyncLocal<List<ApiZone>> ApiZone { get; } = new();65        public bool IsClosed { get; private set; }66        internal bool IsRemote { get; set; }67        internal Func<object, Task> OnMessage { get; set; }68        internal JsonSerializerOptions DefaultJsonSerializerOptions { get; }69        public void Dispose()70        {71            Dispose(true);72            GC.SuppressFinalize(this);73        }74        internal Task<JsonElement?> SendMessageToServerAsync(75            string guid,76            string method,77            object args = null)78            => SendMessageToServerAsync<JsonElement?>(guid, method, args);79        internal Task<T> SendMessageToServerAsync<T>(80            string guid,81            string method,82            object args = null) => WrapApiCallAsync(() => InnerSendMessageToServerAsync<T>(guid, method, args));83        private async Task<T> InnerSendMessageToServerAsync<T>(84            string guid,85            string method,86            object args = null)87        {88            if (IsClosed)89            {90                throw new PlaywrightException($"Connection closed ({_reason})");91            }92            int id = Interlocked.Increment(ref _lastId);93            var tcs = new TaskCompletionSource<JsonElement?>(TaskCreationOptions.RunContinuationsAsynchronously);94            var callback = new ConnectionCallback95            {96                TaskCompletionSource = tcs,97            };98            _callbacks.TryAdd(id, callback);99            var sanitizedArgs = new Dictionary<string, object>();100            if (args != null)101            {102                if (args is IDictionary<string, object> dictionary && dictionary.Keys.Any(f => f != null))103                {104                    foreach (var kv in dictionary)105                    {106                        if (kv.Value != null)107                        {108                            sanitizedArgs.Add(kv.Key, kv.Value);109                        }110                    }111                }112                else113                {114                    foreach (PropertyDescriptor propertyDescriptor in TypeDescriptor.GetProperties(args))115                    {116                        object obj = propertyDescriptor.GetValue(args);117                        if (obj != null)118                        {119#pragma warning disable CA1845 // Use span-based 'string.Concat' and 'AsSpan' instead of 'Substring120                            string name = propertyDescriptor.Name.Substring(0, 1).ToLower() + propertyDescriptor.Name.Substring(1);121#pragma warning restore CA2000 // Use span-based 'string.Concat' and 'AsSpan' instead of 'Substring122                            sanitizedArgs.Add(name, obj);123                        }124                    }125                }126            }127            await _queue.EnqueueAsync(() =>128            {129                var message = new MessageRequest130                {131                    Id = id,132                    Guid = guid,133                    Method = method,134                    Params = sanitizedArgs,135                    Metadata = ApiZone.Value[0],136                };137                TraceMessage("pw:channel:command", message);138                return OnMessage(message);139            }).ConfigureAwait(false);140            var result = await tcs.Task.ConfigureAwait(false);141            if (typeof(T) == typeof(JsonElement?))142            {143                return (T)(object)result?.Clone();144            }145            else if (result == null)146            {147                return default;148            }149            else if (typeof(ChannelBase).IsAssignableFrom(typeof(T)) || typeof(ChannelBase[]).IsAssignableFrom(typeof(T)))150            {151                var enumerate = result.Value.EnumerateObject();152                return enumerate.Any()153                    ? enumerate.FirstOrDefault().Value.ToObject<T>(DefaultJsonSerializerOptions)154                    : default;155            }156            else157            {158                return result.Value.ToObject<T>(DefaultJsonSerializerOptions);159            }160        }161        internal IChannelOwner GetObject(string guid)162        {163            Objects.TryGetValue(guid, out var result);164            return result;165        }166        internal void MarkAsRemote() => IsRemote = true;167        internal Task<PlaywrightImpl> InitializePlaywrightAsync()168        {169            return _rootObject.InitializeAsync();170        }171        internal void OnObjectCreated(string guid, IChannelOwner result)172        {173            Objects.TryAdd(guid, result);174        }175        internal void Dispatch(PlaywrightServerMessage message)176        {177            if (message.Id.HasValue)178            {179                TraceMessage("pw:channel:response", message);180                if (_callbacks.TryRemove(message.Id.Value, out var callback))181                {182                    if (message.Error != null)183                    {184                        callback.TaskCompletionSource.TrySetException(CreateException(message.Error.Error));185                    }186                    else187                    {188                        callback.TaskCompletionSource.TrySetResult(message.Result);189                    }190                }191                return;192            }193            TraceMessage("pw:channel:event", message);194            try195            {196                if (message.Method == "__create__")197                {198                    var createObjectInfo = message.Params.Value.ToObject<CreateObjectInfo>(DefaultJsonSerializerOptions);199                    CreateRemoteObject(message.Guid, createObjectInfo.Type, createObjectInfo.Guid, createObjectInfo.Initializer);200                    return;201                }202                if (message.Method == "__dispose__")203                {204                    Objects.TryGetValue(message.Guid, out var disableObject);205                    disableObject?.DisposeOwner();206                    return;207                }208                Objects.TryGetValue(message.Guid, out var obj);209                obj?.Channel?.OnMessage(message.Method, message.Params);210            }211            catch (Exception ex)212            {213                DoClose(ex);214            }215        }216        private void CreateRemoteObject(string parentGuid, ChannelOwnerType type, string guid, JsonElement? initializer)217        {218            IChannelOwner result = null;219            var parent = string.IsNullOrEmpty(parentGuid) ? _rootObject : Objects[parentGuid];220#pragma warning disable CA2000 // Dispose objects before losing scope221            switch (type)222            {223                case ChannelOwnerType.Artifact:...

ElementHandleChannel.cs

Source:ElementHandleChannel.cs

...39            Object = owner;40        }41        internal event EventHandler<PreviewUpdatedEventArgs> PreviewUpdated;42        public new ElementHandle Object { get; set; }43        internal override void OnMessage(string method, JsonElement? serverParams)44        {45            switch (method)46            {47                case "previewUpdated":48                    PreviewUpdated?.Invoke(this, new() { Preview = serverParams.Value.GetProperty("preview").ToString() });49                    break;50            }51        }52        internal Task<ElementHandleChannel> WaitForSelectorAsync(string selector, WaitForSelectorState? state, float? timeout, bool? strict)53        {54            var args = new Dictionary<string, object>55            {56                ["selector"] = selector,57                ["timeout"] = timeout,...

BrowserType.cs

Source:BrowserType.cs

...161                browser?.DidClose();162                connection.DoClose(closeError != null ? closeError : DriverMessages.BrowserClosedExceptionMessage);163            }164            pipe.Closed += (_, _) => OnPipeClosed();165            connection.OnMessage = async (object message) =>166            {167                try168                {169                    await pipe.SendAsync(message).ConfigureAwait(false);170                }171                catch (Exception e) when (DriverMessages.IsSafeCloseError(e))172                {173                    // swallow exception174                }175                catch176                {177                    OnPipeClosed();178                }179            };...

ChannelBase.cs

Source:ChannelBase.cs

...32            Connection = connection;33        }34        public string Guid { get; }35        public Connection Connection { get; }36        internal virtual void OnMessage(string method, JsonElement? serverParams)37        {38        }39    }40}...

OnMessage

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Transport.Channels;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9    {10        static async Task Main(string[] args)11        {12            using var playwright = await Playwright.CreateAsync();13            await using var browser = await playwright.Chromium.LaunchAsync();14            var page = await browser.NewPageAsync();15            await page.TypeAsync("input[title='Search']", "Playwright");16            await page.PressAsync("input[title='Search']", "Enter");17            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot.png" });18            await page.WaitForLoadStateAsync(LoadState.NetworkIdle);19            await page.WaitForSelectorAsync("h3");20            await page.ClickAsync("h3");21            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot2.png" });22        }23    }24}25using Microsoft.Playwright;26using Microsoft.Playwright.Transport.Channels;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            using var playwright = await Playwright.CreateAsync();37            await using var browser = await playwright.Chromium.LaunchAsync();38            var page = await browser.NewPageAsync();39            await page.TypeAsync("input[title='Search']", "Playwright");40            await page.PressAsync("input[title='Search']", "Enter");41            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot.png" });42            await page.WaitForLoadStateAsync(LoadState.NetworkIdle);43            await page.WaitForSelectorAsync("h3");44            await page.ClickAsync("h3");45            await page.ScreenshotAsync(new PageScreenshotOptions { Path = "screenshot2.png" });46        }47    }48}49using Microsoft.Playwright;50using Microsoft.Playwright.Transport.Channels;51using System;52using System.Collections.Generic;

OnMessage

Using AI Code Generation

1using Microsoft.Playwright;2{3    {4        static async Task Main(string[] args)5        {6            await using var playwright = await Playwright.CreateAsync();7            await using var browser = await playwright.Chromium.LaunchAsync();8            await using var context = await browser.NewContextAsync();9            var page = await context.NewPageAsync();10            var element = await page.QuerySelectorAsync("input[name=q]");11            await element.TypeAsync("Hello World");12            var element2 = await page.QuerySelectorAsync("input[name=btnK]");13            await element2.ClickAsync();14            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);15            await element3.ClickAsync();16            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);17            await page.ScreenshotAsync("screenshot.png");18        }19    }20}21using Microsoft.Playwright;22{23    {24        static async Task Main(string[] args)25        {26            await using var playwright = await Playwright.CreateAsync();27            await using var browser = await playwright.Chromium.LaunchAsync();28            await using var context = await browser.NewContextAsync();29            var page = await context.NewPageAsync();30            var element = await page.QuerySelectorAsync("input[name=q]");31            await element.TypeAsync("Hello World");32            var element2 = await page.QuerySelectorAsync("input[name=btnK]");33            await element2.ClickAsync();34            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);35            await element3.ClickAsync();36            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);37            await page.ScreenshotAsync("screenshot.png");38        }39    }40}41using Microsoft.Playwright;42{43    {44        static async Task Main(string[] args)45        {

OnMessage

Using AI Code Generation

1{2    public static async Task Main(string[] args)3    {4        var playwright = await Playwright.CreateAsync();5        var browser = await playwright.Chromium.LaunchAsync();6        var page = await browser.NewPageAsync();7        await page.ScreenshotAsync("example.png");8        await browser.CloseAsync();9    }10}11{12    public static async Task Main(string[] args)13    {14        var playwright = await Playwright.CreateAsync();15        var browser = await playwright.Chromium.LaunchAsync();16        var page = await browser.NewPageAsync();17        await page.ScreenshotAsync("example.png");18        await browser.CloseAsync();19    }20}21{22    public static async Task Main(string[] args)23    {24        var playwright = await Playwright.CreateAsync();25        var browser = await playwright.Chromium.LaunchAsync();26        var page = await browser.NewPageAsync();27        await page.ScreenshotAsync("example.png");28        await browser.CloseAsync();29    }30}31{32    public static async Task Main(string[] args)33    {34        var playwright = await Playwright.CreateAsync();35        var browser = await playwright.Chromium.LaunchAsync();36        var page = await browser.NewPageAsync();37        await page.ScreenshotAsync("example.png");38        await browser.CloseAsync();39    }40}41{42    public static async Task Main(string[] args)43    {44        var playwright = await Playwright.CreateAsync();45        var browser = await playwright.Chromium.LaunchAsync();46        var page = await browser.NewPageAsync();

OnMessage

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Transport.Channels;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Reflection;7using System.Text;8using System.Threading.Tasks;9{10    {11        static async Task Main(string[] args)12        {13            using var playwright = await Playwright.CreateAsync();14            await using var browser = await playwright.Chromium.LaunchAsync();15            var page = await browser.NewPageAsync();16            var channel = page.Channel;17            var onMessageMethod = channel.GetType().GetMethod("OnMessage", BindingFlags.NonPublic | BindingFlags.Instance);18            channel.MessageReceived += (sender, e) => {19                Console.WriteLine(e.Message);20            };21            await page.EvaluateAsync(@"() => {22                const button = document.querySelector('button');23                button.addEventListener('click', () => {24                    button.innerText = 'Clicked';25                });26            }");27            await page.ClickAsync("text=Get started");28            await Task.Delay(10000);29        }30    }31}

OnMessage

Using AI Code Generation

1ChannelBase channel = (ChannelBase)page;2channel.OnMessage += Channel_OnMessage;3PageChannel pageChannel = (PageChannel)page;4pageChannel.OnMessage += PageChannel_OnMessage;5PageChannel pageChannel = (PageChannel)page;6pageChannel.OnMessage += PageChannel_OnMessage;7PageChannel pageChannel = (PageChannel)page;8pageChannel.OnMessage += PageChannel_OnMessage;9PageChannel pageChannel = (PageChannel)page;10pageChannel.OnMessage += PageChannel_OnMessage;11PageChannel pageChannel = (PageChannel)page;12pageChannel.OnMessage += PageChannel_OnMessage;13PageChannel pageChannel = (PageChannel)page;14pageChannel.OnMessage += PageChannel_OnMessage;15PageChannel pageChannel = (PageChannel)page;16pageChannel.OnMessage += PageChannel_OnMessage;17PageChannel pageChannel = (PageChannel)page;18pageChannel.OnMessage += PageChannel_OnMessage;19PageChannel pageChannel = (PageChannel)page;20pageChannel.OnMessage += PageChannel_OnMessage;

OnMessage

Using AI Code Generation

1{2    using System;3    using System.Collections.Generic;4    using System.Diagnostics;5    using System.Linq;6    using System.Text.Json;7    using System.Threading;8    using System.Threading.Tasks;9    using Microsoft.Playwright.Core;10    using Microsoft.Playwright.Transport.Protocol;11    {12        private readonly Dictionary<string, object> _guidToChannel = new Dictionary<string, object>();13        private readonly Dictionary<Type, object> _guidToOwner = new Dictionary<Type, object>();14        private readonly Dictionary<string, object> _guidToType = new Dictionary<string, object>();15        private readonly List<ChannelBase> _objects = new List<ChannelBase>();16        private readonly List<ChannelOwnerBase> _owners = new List<ChannelOwnerBase>();17        private readonly List<ChannelBase> _parents = new List<ChannelBase>();18        private readonly List<ChannelBase> _children = new List<ChannelBase>();19        private readonly List<ChannelBase> _removedObjects = new List<ChannelBase>();20        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForObjectTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();21        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForObjectTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();22        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForOwnerTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();23        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForOwnerTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();24        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForTypeTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();25        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForTypeTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();26        private readonly Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForParentTasks = new Dictionary<string, TaskCompletionSource<ChannelBase>>();27        private Dictionary<string, TaskCompletionSource<ChannelBase>> _waitForParentTasksCopy = new Dictionary<string, TaskCompletionSource<ChannelBase>>();

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.

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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.
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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.
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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.
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