Puppeteer Sharp Part 1

Puppeteer Sharp is a .NET port of the official Node.JS Puppeteer API.

Step 1: Create .net console or Wpf project

Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <UseWPF>true</UseWPF>
  </PropertyGroup>


</Project>

Step 2: Add PuppeteerSharp package reference

<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <UseWPF>true</UseWPF>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="PuppeteerSharp" Version="2.0.3" />
  </ItemGroup>

</Project>

Step 3: Install Chromium

https://chromium.woolyss.com/download/en/

Step 4: Launch options with Chromium Path

var launchOptions = new LaunchOptions() { 
            Headless=false,
            ExecutablePath= @"C:\Chromium\chrome.exe"
            };

//Other options is if you want to auto download chromium await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);

Step 5: Close any existing browser

Do this step if you want close any existing browser page

 if (browser != null) {
               await browser.CloseAsync();
            }

Step 6: Launch brower with launch option

browser = await Puppeteer.LaunchAsync(launchOptions);

Step 7: Open new page and load website

var page = await browser.NewPageAsync();
            await page.GoToAsync("https://www.websocket.org/echo.html");

Step 8: Click connect button

 await page.ClickAsync(".echo-button");

Step 9: Clear any existing text in sendMessage textbox using js script

//clear textbox using Puppeteer and js script
            await page.EvaluateExpressionAsync("document.querySelector('#sendMessage').value =''");

Step 10: Type and text and click send button

            await page.TypeAsync("#sendMessage", ".net") ; 
            await page.ClickAsync("#send");
            await page.EvaluateExpressionAsync("document.querySelector('#sendMessage').value =''");
            await page.TypeAsync("#sendMessage", "olasdsds");
            await page.ClickAsync("#send");