How to Take a Screenshot of an Element Hidden Under the Scrollbar using Selenium with C# .NET

-
Screenshot of an Element Hidden Under the Scrollbar using Selenium

This blog is going to explain how to take a screenshot of the element which is hidden under the scrollbar.

In selenium ((ITakesScreenshot)driver).GetScreenshot() takes a screenshot of the method page. Also, you can crop a specific element to capture. But when the image is hidden under the scroll bar. When you try to take a screenshot, the application will throw System.OutOfMemoryException: 'Out of memory.' error.

Let's see how to take a screenshot of the element hidden under the scrollbar.

The following is the console application code. In the code first, I have downloaded the ChromeDriver, which is the same version of the Chrome browser installed on my computer. Then I created the instance for the driver and navigated to the URL. Then scrolled to the location where the element is to be taken. Then I took a screenshot. Calculate the page y offset and find the difference with element Y location. Then cropped the element and saved it in the local machine.

using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using System;
using System.Drawing;
using System.IO;
using WebDriverManager;
using WebDriverManager.DriverConfigs.Impl;
using WebDriverManager.Helpers;

namespace SampleConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            // Download the same version of chromedriver
            var chromeDriverPath = new DriverManager().SetUpDriver(new ChromeConfig(), VersionResolveStrategy.MatchingBrowser);

            // Get a path of chromedriver
            string chromeDirectoryPath = System.IO.Path.GetDirectoryName(chromeDriverPath);

            // Create instance by passing the path of the chromedriver directory
            IWebDriver driver = new ChromeDriver(chromeDirectoryPath);

            // Navigate to URL
            driver.Navigate().GoToUrl("https://localhost:44311/");

            // Scroll to the element where you want to take the screenshot
            IJavaScriptExecutor jse = (IJavaScriptExecutor)driver;
            jse.ExecuteScript("document.getElementById('screenshotDiv').scrollIntoView();");

            // Take a screenshot of the page
            Screenshot sc = ((ITakesScreenshot)driver).GetScreenshot();
            var img = Image.FromStream(new MemoryStream(sc.AsByteArray)) as Bitmap;

            // Calculate the difference between page Y offset and element Y location
            var element = driver.FindElement(By.Id("screenshotDiv"));
            IJavaScriptExecutor js = (IJavaScriptExecutor)driver;
            var yOffset = js.ExecuteScript("return window.pageYOffset;");
            var y = Convert.ToInt32(yOffset);
            var diff = element.Location.Y - y;

            // Crop the element to take the screenshot
            var image = img.Clone(new Rectangle(element.Location.X, diff, element.Size.Width, element.Size.Height), img.PixelFormat);

            // Save the image in local drive
            image.Save(AppDomain.CurrentDomain.BaseDirectory + "//Screenshot.png");
        }
    }
}

The following image is the output of the code above. Here you can see that the pink div element was first hidden under the scroll bar. But the application scroll to the element and captures the screenshot

Element Hidden Under the Scrollbar

I hope this helps you. Keep coding.

Comments

Post a Comment

Popular posts from this blog

Entity Framework Core (EF) with SQL Server LocalDB

-
Image
This blog is going to illustrate how to implement Entity Framework (EF) Core with SQL Server LocalDB. The Entity Framework Core enables access to data from the database. This allows developers to avoid having to write most of the data access code. And the SQL Server LocalDB works similarly to the SQL SERVER with few features. You can get the LocalDB when you install visual studio or visual studio express. You can find the .mdf and _log.ldf files in the C:/Users/{user} directory. Let see how to create a SQL Server LocalDB and implement Entity Framework Core Step 1: The first step is to add a connection. In the menu -> click Tools and select Connect to Database It will display the Add Connection window. Enter (localdb)\mssqllocaldb in the server name textbox. Then in the Select or enter a database, select master and click ok Now in the server explorer, you can find the master DB containing Tables, Views, Stored
Read more

Exploring EventCallback in Blazor: Building Interactive Components

-
Image
Introduction: Blazor is a powerful framework for building web applications using C# instead of JavaScript. It allows developers to create interactive and dynamic user interfaces with ease. One of the key features in Blazor is the EventCallback<T> pattern, which enables communication between components through events. In this blog post, we will explore how to use the EventCallback<T> pattern in Blazor by building a simple example. Creating the Event-Driven Component: Let's start by creating a Blazor component called MyComponent. This component will raise an event when a button is clicked. Here's the code for the MyComponent.razor file: MyComponent.razor < h3 > My Component < / h3 > < button @onclick = " RaiseEvent " > Raise Event < / button > @code { [ Parameter ] public EventCallback < string > EventRaised { get ; set ; } private async Task RaiseEvent ( ) { await EventRais
Read more

A Step-by-Step Guide to Implementing Identity in ASP.NET Core MVC

-
Image
Are you ready to enhance your ASP.NET Core MVC project with the power of Identity? In this comprehensive guide, we'll walk you through the process of setting up and customizing the Identity system in your web application. By the end of this tutorial, you'll be able to implement secure user authentication and authorization for your ASP.NET Core project. Step 1: Create a New ASP.NET Core Web App Begin by opening Visual Studio and selecting "ASP.NET Core Web App (Model-View-Controller)" as your project template. Follow these steps: 1. Open Visual Studio and create a new project, selecting "ASP.NET Core Web App (Model-View-Controller)". 2. In the "Configure your project" window, enter the project name and choose the project's location. 3. In the "Additional Information" window, select the framework and choose "Individual Accounts" as the Authentication type. 4. Click "Create" to generate your project.
Read more