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

SignalR with JavaScript in ASP.NET Core MVC

-
Image
This blog is going to explain what is SignalR and how to implement it in ASP.NET Core. SignalR is a real time application framework for ASP.NET Core. Using SignalR you can provide updated information without refreshing the page, for example poll results, game score, chat etc. Let's see how to achieve it in ASP.NET Core MVC. Step 1: First step I added the SignalR client library. To add a SignalR client library, Right click on the project in Solution Explorer and Add -> Client-Side Library. Select the provider as unpkg as shown in the image below. Enter the latest version of SignalR into the library. And selected signalr.js and signalr.min.js files. Finally clicked the install button to install the client library. Step 2: At this step I have created a VoteHub.cs class inside the Hubs folder(create a new folder called Hubs). This class inherits from the Hub class which is a base class of SignalR hub. The SendMessage method will be called by the connected client.
Read more

Localization in ASP.NET Core MVC with Example

-
Image
Using Query Strings for Request Culture and Simplifying Localization with IStringLocalizer Interface Let’s see how to implement Localization in ASP.NET Core MVC. In the first example, I am going to use the IStringLocalizer Interface in the controller to implement Localization. Additionally, when the user passes the desired language through the query string, it will display content in that language. First, let’s configure the settings in the program.cs file. builder.Services.AddLocalization(options => options.ResourcesPath = "Resources");  The AddLocalization method adds the localization service to the service container. I have added the supported cultures here. I have added two cultures: en for English and nl for Dutch. In the RequestCultureProviders , I have included QueryStringRequestCultureProvider() . This allows the system to determine the culture information from the query string. UseRequestLocalization initializes a RequestLocalizationOptions objec
Read more