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Written by: Stanko Milosev

Category: Code snippets

Published: 21 December 2019

Last Updated: 10 February 2022

Hits: 1738

string milosevCom = "http://www.milosev.com";
string doc = "";
using (System.Net.WebClient client = new System.Net.WebClient())
{
	doc = client.DownloadString(milosevCom);
}

Console.WriteLine(doc);
Console.ReadKey();

Details

Written by: Stanko Milosev

Category: Code snippets

Published: 06 June 2015

Last Updated: 06 April 2022

Hits: 7625

Here I explained how to install MonoDevelop. As I already explained here, first download Selenium Client & WebDriver Language Bindings, in my case I downloaded this one. You will also need ChromeDriver (this time for linux), in my case I downloaded this one. 

If you try to use chromedriver for windows you will receive errors like:

OpenQA.Selenium.WebDriverException: Unexpected error. System.Net.WebException: Error: ConnectFailure (Connection refused) ---> System.Net.Sockets.SocketException: Connection refused
at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x000f7] in <filename unknown>:0
at System.Net.WebConnection.Connect (System.Net.HttpWebRequest request) [0x0019b] in <filename unknown>:0
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetRequestStream (IAsyncResult asyncResult) [0x00043] in <filename unknown>:0
at System.Net.HttpWebRequest.GetRequestStream () [0x00057] in <filename unknown>:0
at OpenQA.Selenium.Remote.HttpCommandExecutor.Execute (OpenQA.Selenium.Remote.Command commandToExecute)

and:

run-detectors: unable to find an interpreter for /home/stanko/Downloads/SeleniumTest/SeleniumTest/bin/Debug/chromedriver.exe

Also if you in terminal window write something like:

mono chromedriver.exe

Then you will receive error like:

Cannot open assembly 'chromedriver.exe': File does not contain a valid CIL image

That is why we need to use Linux version of chromedriver.

Download and install Chrome.

Open MonoDevelop, start new solution:

choose console project:

After creating project right click on references:

switch to .Net Assembly tab, and add selenium dll's which we downloaded previously. 

Now open Program.cs, in using section write:

using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

In main method write something like:

ChromeDriverService service = ChromeDriverService.CreateDefaultService(@"/home/myUserName/projects/SeleniumTest/lib/chromedriver_linux64", "chromedriver");
IWebDriver driver = new ChromeDriver(service);
driver.Navigate ().GoToUrl ("http://www.milosev.com");

Notice line:

ChromeDriverService service = ChromeDriverService.CreateDefaultService(@"/home/myUserName/projects/SeleniumTest/lib/chromedriver_linux64", "chromedriver");

This line we need to tell selenium that we will use Linux chromedriver, otherwise Selenium will always try to load chromedriver.exe (Windows one).

Whole application should look like this:

using System;

using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

namespace SeleniumTest
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			ChromeDriverService service = ChromeDriverService.CreateDefaultService(@"/home/myUserName/projects/SeleniumTest/lib/chromedriver_linux64", "chromedriver");
			IWebDriver driver = new ChromeDriver(service);
			driver.Navigate ().GoToUrl ("http://www.milosev.com");
		}
	}
}

Of course path "/home/myUserName/projects/SeleniumTest/lib/chromedriver_linux64" change to path where you downloaded your chromedriver.

Example download from here, and don't forget to use http in your URL's otherwise Selenium will not work.

Details

Written by: Stanko Milosev

Category: Code snippets

Published: 04 June 2015

Last Updated: 06 April 2022

Hits: 4780

Selenium tests in java, I already explained here. Since I am not Java expert I need them to run also in .NET environment, idea is to create console application to parse few web pages, by automatizing Chrome. I am using this web site.

Download Selenium Client & WebDriver Language Bindings, in my case I downloaded this one. You will also need ChromeDriver, in my case I downloaded this one.

Start new project:

Choose console:

 Add references to previously downloaded Selenium Client & WebDriver Language Bindings (in solution explorer right mouse button on References):

Browse:

In my case I decided to go on net40:

Add dll's:

In my case I decided to add also ChromeDriver to project, then I will not have explicitly to write path. Right click on the project and click add existing item:

Choose chrome driver:

Select chrome driver, choose properties:

In part Copy To Output Directory, choose Copy always. You can also choose copy if newer, but to avoid possible problems I decided to go like this:

Now I added following name spaces:

using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Support.UI;

Then in Main method add code like:

IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("http://www.milosev.com");

In line:

IWebDriver driver = new ChromeDriver();

You can also write something like:

IWebDriver driver = new ChromeDriver(@"C:\Users\myUserName\Downloads\chromedriver_win32");

Then you wouldn't need to add chrome driver into the project...

So, this is all you need to start parsing pages with Selenium. Example project download from here.