Web scraping through WebBrowser (.Net WinForm Control)

In this post, I am going to explain how it is easy to extract and change the the webpage content through WebBrowser control. The WebBrowser is a Microsoft windows form control and easy to use. This post will explain you how you can use this control for your need.

The WebBrowser control is used to display the webpage in your application. The WebBrowser class is a powerful class that give you leverage to manipulate the html code, interact with JavaScript, automate the web scrapping and many more.

You can find more about the WebBrowser from MSDN library. The following steps will guide you how to use the WebBrowser.

1.       The first thing that you should do is to create a windows application project.

2.       Add a WebBrowser and two button controls on web form.  

3.       Set the “Url” property of the control or you can do this programmatically using the below code snippet.

webBrowser.Navigate("https://www.google.com");

4.       When you run the application, you will see the screen look as per below screen print

5.       If you want to set anything to webpage control use the below code and even you can fire the control events as well. Here, I am going to set the value to the search box (for this example I am going to set my name “Mohd Azharuddin Ansari” to search box) and then I will fire “Click” event of search button programmatically. If everything will go as per plan then google will present me the result based on the search criteria.

Code (This code will go on first button click event)

                webBrowser.Document.GetElementById("q").SetAttribute("value", "Mohd Azharuddin Ansari");

            HtmlElement button = webBrowser.Document.GetElementById("btnK");

            button.InvokeMember("click");

Result

6.       Now if you need to extract this results on somewhere your code then you can do it using the below code

Code (This code will go on second button click event)

string searchResultText = "";

            HtmlElementCollection searchResult = webBrowser.Document.GetElementsByTagName("h3");

            foreach(HtmlElement he in searchResult)

            {

                searchResultText += he.InnerText + System.Environment.NewLine;

            }

            MessageBox.Show(searchResultText);

Result

Secure your website to be iframed

In this post I am going to explain how you can secure you website from being iFramed. When you are presenting sensitive data on website then you must secure your data from other websites. In order to do this, you need to add a below header on the web server.

Header Name – X-Frame options header

Options

                Deny – Block all the sites

                Sameorigin – Allow only the sites have same origin.

                Allow-From - Specify list of domain name

List of RSA Key Container Names

List RSA key container

If you are struggling to get which RSA key installed on your machine then this post will help you in this. There is no straight forward thing that will give you the installed RSA containers names. With the help of below steps you will be able to get the list of installed RSA key container names.

So, without wasting any time more let’s jump on the solution.

Step 1. Open visual studio IDE and create a console application

Step 2. Add “using System.IO;” namespace to the program class

Step 3. Add below code in Main method

var files = System.IO.Directory.GetFiles(@"C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys\");

            foreach (var f in files)

            {

                // try catch is to avoid some ACL issues on certain files

                try

                {

                    byte[] bytes = File.ReadAllBytes(f);

                    string containerName = Encoding.ASCII.GetString(bytes, 40, bytes[8] - 1);

                    Console.WriteLine(containerName);

                }

                catch (Exception)

                {

                }