Martin Normark's blog » C#

Make CSS inline in C# and ASP.NET using PreMailer.Net

Martin Normark — Fri, 10 Jun 2011 09:58:55 +0000

Being able to make CSS inline is something you need all the time when sending HTML e-mails. HTML E-mails simply don't render perfectly in all e-mail clients if you don't make all your styles inline.

Campaign Monitor introduced the ability to make CSS inline years ago, and it just works. They use the premailer Ruby project to do this, and it seems to work perfectly. You can edit your HTML e-mails using styles embedded inside the HTML document's tag, and they automatically make the CSS inline on all elements that match your selectors.

At the end of my latest blog post on How to Send HTML E-mail from an ASP.NET MVC Controller, I wrote that I'd like to combine the ActionMailer.Net library with the premailer Ruby project, to be able to send great HTML e-mails from an application, that renders well in all e-mail clients.

I honestly didn't want to combine ASP.NET MVC with a Ruby project. I can't image all the hacks necessary to make it work. Eventually, I'd probably start a process from ASP.NET that runs the Ruby script - but it's still a hack in my opinion.

That made me search the .Net community to see if I could find anything similar for .Net, but I didn't succeed. But instead I found two interesting things:

A CSS Parser for .NET (by The Dynamic Programmer).
A .Net CSS Selector Engine, called Fizzler.

And that is exactly what it takes to make CSS inline. I added code to the CSS parser, so that it would merge the style block, if an element already had inline styles specified, and packed the two project into my own solution, called PreMailer.NET.

It works like this:

string htmlSource = File.ReadAllText(@"C:\Workspace\testmail.html");
PreMailer pm = new PreMailer();
string premailedOutput = pm.MoveCssInline(htmlSource, false);

The premailedOutput variable contains e-mail mark-up ready to send.

For more information on how to create HTML E-mails, check out the HTML E-mail Boilerplate, and Campaign Monitor's blog, and resources section.

Serialize C# dynamic and Anonymous types to XML

Martin Normark — Thu, 03 Feb 2011 16:50:06 +0000

Dynamic / Anonymous types in C# was a great improvement to the framework, made in version 3.0. I use it a lot when doing AJAX callbacks from JavaScript to ASP.NET MVC Controllers, not to forget the extensive use of anonymous types already used in ASP.NET MVC.

Then yesterday, one case where I absolutely needed to use anonymous types was in my application’s logging service. I want to be able to save behaviors/actions as well as errors. I have two separate tables, but both behaviors and errors can provide a set of details. To do the actual logging, I call an implementation of this interface:

    /// 
    /// Defines methods for logging errors and behavior.
    /// 
    [ServiceContract]
    public interface ILogService
    {
        /// 
        /// Logs the behavior with data.
        /// 
        /// The application instance id.
        /// The action.
        /// The log date.
        /// The user agent.
        /// The behavior data.
        /// The source.
        [OperationContract]
        void LogBehaviorWithData(int applicationInstanceId, string action, DateTime logDate, string userAgent, string behaviorData, string source);

        /// 
        /// Logs the behavior.
        /// 
        /// The application instance id.
        /// The action.
        /// The log date.
        /// The user agent.
        /// The source.
        [OperationContract]
        void LogBehavior(int applicationInstanceId, string action, DateTime logDate, string userAgent, string source);
    }

In the LogBehaviorWithData method, I wanted to specify behaviorData as XML, since the column in the database is an XML column. I do this, so that I’m able to query the table and using XPath to filter on behavior data. That requires me to send XML to the method, and I don’t want to fool around manually with an XmlDocument or something similar.

I was looking around the internet for a way to serialize an anonymous type to XML, and came across a few questions on StackOverflow. The first one accepted there’s no way to do that – even though there was a fine answer below, and the second didn’t provide a solution. I took the code provided by Matthew Whited in his excellent answer (that I don’t believe is not the correct answer of the question). It worked out of the box, except for Arrays, so that needed some extensions.

How to use it

It’s simply an Extension Method of the object type, called ToXml(). And it is used like this:

object d = new
{
    Username = "martin",
    Roles = new[]
    {
        "Developer",
        "Administrator"
    }
};

XElement xml = d.ToXml();
string xmlString = xml.ToString();

The output is a beautifully formatted XML string:

<object>
  <Username>martinUsername>
  <Roles>
    <RolesChild>DeveloperRolesChild>
    <RolesChild>AdministratorRolesChild>
  Roles>
object>

To make it more database friendly, you can omit the formatting by specifying SaveOptions in the ToString method call:

string xmlString = xml.ToString(SaveOptions.DisableFormatting);

The actual code

The actual code is quite simple, yet there’s some fiddling around with different types and such. I guess the name of child elements could also need some improvement, preferably changing the collection name to a singular representation and use that as the element name of its children.

using System;
using System.Linq;
using System.Reflection;
using System.Xml;
using System.Xml.Linq;

/// 
/// Extension methods for the dynamic object.
/// 
public static class DynamicHelper
{
    /// 
    /// Defines the simple types that is directly writeable to XML.
    /// 
    private static readonly Type[] _writeTypes = new[] { typeof(string), typeof(DateTime), typeof(Enum), typeof(decimal), typeof(Guid) };

    /// 
    /// Determines whether [is simple type] [the specified type].
    /// 
    /// The type to check.
    /// 
    ///     true if [is simple type] [the specified type]; otherwise, false.
    /// 
    public static bool IsSimpleType(this Type type)
    {
        return type.IsPrimitive || _writeTypes.Contains(type);
    }

    /// 
    /// Converts an anonymous type to an XElement.
    /// 
    /// The input.
    /// Returns the object as it's XML representation in an XElement.
    public static XElement ToXml(this object input)
    {
        return input.ToXml(null);
    }

    /// 
    /// Converts an anonymous type to an XElement.
    /// 
    /// The input.
    /// The element name.
    /// Returns the object as it's XML representation in an XElement.
    public static XElement ToXml(this object input, string element)
    {
        if (input == null)
        {
            return null;
        }

        if (String.IsNullOrEmpty(element))
        {
            element = "object";
        }

        element = XmlConvert.EncodeName(element);
        var ret = new XElement(element);

        if (input != null)
        {
            var type = input.GetType();
            var props = type.GetProperties();

            var elements = from prop in props
                                         let name = XmlConvert.EncodeName(prop.Name)
                                         let val = prop.PropertyType.IsArray ? "array" : prop.GetValue(input, null)
                                         let value = prop.PropertyType.IsArray ? GetArrayElement(prop, (Array)prop.GetValue(input, null)) : (prop.PropertyType.IsSimpleType() ? new XElement(name, val) : val.ToXml(name))
                                         where value != null
                                         select value;

            ret.Add(elements);
        }

        return ret;
    }

    /// 
    /// Gets the array element.
    /// 
    /// The property info.
    /// The input object.
    /// Returns an XElement with the array collection as child elements.
    private static XElement GetArrayElement(PropertyInfo info, Array input)
    {
        var name = XmlConvert.EncodeName(info.Name);

        XElement rootElement = new XElement(name);

        var arrayCount = input.GetLength(0);

        for (int i = 0; i < arrayCount; i++)
        {
            var val = input.GetValue(i);
            XElement childElement = val.GetType().IsSimpleType() ? new XElement(name + "Child", val) : val.ToXml();

            rootElement.Add(childElement);
        }

        return rootElement;
    }
}

That way it is possible to serialize an anonymous type in C# to XML.

Download

Download the class from my SkyDrive.

Making your ASP.NET Global Resource files work in JavaScript. IntelliSense included!

Martin Normark — Mon, 15 Nov 2010 15:22:20 +0000

Any modern web application needs localization! You simply can't ignore the huge amounts of people who doesn't speak your language, or whose native language is different from yours.

You're probably using resource files (.resx) in .NET, but how do you go about getting values from your resource files in JavaScript?

Rick Strahl wrote a great blog post about an HttpHandler that serves the content of your resource files in JavaScript. You basically add a script tag to your page that points to the HttpHandler, and the HttpHandler will produce the resources in JavaScript as an object with properties on it, like this:

[code lang="js"]var localRes = {
AreYouSureYouWantToRemoveValue: "Sind Sie sicher dass Sie diesen Wert l\u00F6schen wollen?",
BackupComplete: "Der Backup f\u00FChrte erfolgreich durch",
BackupFailed: "Der Backup konnte nicht durchgef\u00FChrt werden",
BackupNotification: "Diese Operation macht einen Backup von der Lokalisationtabelle. \nM\u00F6chten Sie fortfahren?",
Close: "Schliessen",
FeatureDisabled: "Diese Funktion ist nicht vorhanden im on-line Demo ",
InvalidFileUploaded: "Unzul\u00E4ssige Akten Format hochgeladen.",
InvalidResourceId: "Unzul\u00E4ssige ResourceId",
Loading: "Laden",
LocalizationTableCreated: "Lokalisations Akte wurde erfolgreich erstellt.",
LocalizationTableNotCreated: "Die Localizations Akte konnte nicht erstellt werden."
};[/code]

This is awesome! Now you can access your resource files from JavaScript. Though, I see a single improvement to be made. The thing I don't like about the HttpHandler approach, is that you don't get IntelliSense support in Visual Studio. So you have to browse your resource file and copy & paste the resource key to your JavaScript files in order for this to work.

Generate static JavaScript files on Post-build

Instead of generating dynamic files at runtime, I prefer to generate static JavaScript files and then dynamically include the file of the current language on my pages. I do this by calling a Console Application I’ve written on the Post-build event of my ASP.NET (MVC) project, which you can set in the property pages of your project (By the way, did you know that you can open property pages of a project by double clicking the default Properties folder?):

What my JavascriptResxGenerator App does, is quite messy. But the essence of the App is, of course, to take a single (or several) .resx files and do the following:

1. Loop through all keys.

2. Make sure the key is not a JavaScript reserved word.

3. Add the key and value to a dictionary (in JavaScript).

4. Write the file.

And for the default culture I generate a –vsdoc file, that I can use for Visual Studio IntelliSense.

Using the JavaScript Resx Generator App

My App supports a single file approach, and directory approach.

Single file: JavascriptResxGenerator.exe C:\Folder\Text.resx C:\Output C:\Output\VsDoc MyApp.Namespace.Resources

Directory: JavascriptResxGenerator.exe C:\Folder C:\Output C:\Output\VsDoc MyApp.Namespace.Resources

The MyApp.Namespace.Resources value, is the namespace your resource dictionary will get enclosed in.

Embedding the file on your pages

To include the JavaScript resource file in your page, you simply add a script include tag that points to the correct language. The App will respect the region token used in your Resx files. So if you have a file called Text.da.resx, the JavaScript file generated will include .da.resx at the end. It’s then up to you to add the correct logic to keep hold of the current language and specify the correct region token in order to include the correct JavaScript resource file.

Download

You can download the App here, as a ZIP file.

Translate text in C#, using Google Translate, revisited

Martin Normark — Mon, 25 Oct 2010 15:31:49 +0000

A long time ago, I wrote a blog post about how to translate text in C# using Google Translate. Since then, an official AJAX API has been released, which is a much better solution. Reading the comments of the blog post indicates that the code was broken quite quickly!

Google’s AJAX Language API, also includes functionality to detect language from a given string. All you can do on translate.google.com you can do via the API. Reading the class reference for the Translation API, for Flash and other Non-Javascript environments gives us the information we need to perform translations from C#. Most important is the URL and the parameters required and accepted.

Another very important thing we can read in the documentation is this:

Applications MUST always include a valid and accurate http referer header in their requests

We must remember to add a valid referrer when making the actual call!

The response object

Google’s AJAX Language APIs uses JSON, and returns a JSON object containing 3 properties:

responseData
responseDetails
responseStatus

This means we need to have some C# objects that we can use to deserialize the JSON returned from Google. I’m using a generic class called GoogleAjaxResponse, with T being the specific class I want the JSON to be deserialized to.

using System.Runtime.Serialization;

namespace Milkshake.Integration.Google
{
	/// Defines a response from one of Google's AJAX APIs.
	/// The type of object, being returned.
	[DataContract]
	public class GoogleAjaxResponse
	{
		///
		/// Gets or sets the response data.
		///
		///
		/// The responseData from Google AJAX API Call
		///
		/// The response data.
		[DataMember(Name = "responseData", Order = 0)]
		public T ResponseData { get; set; }
	}
}

To deserialize the Translation specific JSON, I use the TranslationResponse class:

using System.Net;
using System.Runtime.Serialization;

namespace Milkshake.Integration.Google.Translate
{
	/// Defines a response from the Google AJAX Translate API.
	[DataContract]
	public class TranslationResponse
	{
		/// Initializes a new instance of the  class.
		public TranslationResponse()
		{
			this.ResponseStatus = HttpStatusCode.OK;
		}

		/// Gets or sets the translated text.
		/// The translated text.
		[DataMember(Name = "translatedText", Order = 0)]
		public string TranslatedText { get; set; }

		/// Gets or sets the response details.
		/// The response details.
		[DataMember(Name = "responseDetails", Order = 1)]
		public object ResponseDetails { get; set; }

		/// Gets or sets the response status.
		/// The response status.
		[DataMember(Name = "responseStatus", Order = 2)]
		public HttpStatusCode ResponseStatus { get; set; }
	}
}

Calling the Google AJAX Translate API

To make the actual call, we can use the HttpWebRequest and HttpWebResponse classes.

using System;
using System.Globalization;
using System.IO;
using System.Net;
using System.Web;
using System.Web.Script.Serialization;

namespace Milkshake.Integration.Google.Translate
{
	/// An API Client for the Google AJAX Translate API.
	public class TranslateApi
	{
		/// The JavaScript serializer
		private JavaScriptSerializer _Serializer = new JavaScriptSerializer();

		/// Translates the text.
		public string TranslateText(string inputText, string sourceLanguage, string destinationLanguage, string referrer, string apiKey)
		{
			string requestUrl = string.Format("http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q={0}&langpair={1}|{2}&key={3}", HttpUtility.UrlEncode(inputText), sourceLanguage.ToLowerInvariant(), destinationLanguage.ToLowerInvariant(), apiKey);

			try
			{
				using (HttpClient http = new HttpClient(requestUrl))
				{
					http.AddReferrer(referrer);
					http.ExecuteRequest();

					string responseJson = http.GetResponseString();

					GoogleAjaxResponse translation = this._Serializer.Deserialize>(responseJson);

					if (translation != null && translation.ResponseData != null && translation.ResponseData.ResponseStatus == HttpStatusCode.OK)
					{
						return translation.ResponseData.TranslatedText;
					}
					else
					{
						return String.Empty;
					}
				}
			}
			catch
			{
				return String.Empty;
			}
		}
	}
}

The response JSON and translated text

Doing a simple test, I translate “Hello world” from English to Danish, and I can see that it works like a charm.

Professional translations - even via API!

Generate HTML e-mail body in C# using templates

Martin Normark — Sat, 13 Mar 2010 23:42:00 +0000

Almost a year ago, I answered a question on StackOverflow, about if there’s a better way to generate HTML e-mails in C# than using a StringBuilder and just appending strings one by one.

I think that any modern piece of software today, needs to send e-mail. Whether it being password recovery e-mails, rich reports, newsletters or anything else – being able to easily see and customize the look and feel of your e-mails is vital.

So, the worst way I could think of is having your HTML hidden away in some StringBuilder.Append() hell. The best solution (in my opinion) would be, if you could have plain old HTML files with parameters like <#FirstName#> so you could dynamically replace those at runtime.

The MailDefinition class

Luckily, there’s a class for that! If you read the comments on my answer on StackOverflow, you’ll notice that none of them was familiar with that class and it came as a bit of a surprise. It did for me too, I actually wrote my own “MailDefinition” class that did just about the same thing. A complete waste of time, and it only tells me that us, developers, are sometimes too trigger happy on the keyboard instead of doing some research first. A quick search in the MSDN documentation would have saved me some work here and there.

Using the MailDefinition class is pretty straight forward. You use the MailDefinition class to create an instance of MailMessage, which you can send straightaway:

MailDefinition md = new MailDefinition();
md.From = "test@domain.com";
md.IsBodyHtml = true;
md.Subject = "Test of MailDefinition";

ListDictionary replacements = new ListDictionary();
replacements.Add("<%Name%>", "Martin");
replacements.Add("<%Country%>", "Denmark");

string body = "
Hello <%Name%>

You're from <%Country%>.

";

MailMessage msg = md.CreateMailMessage("you@anywhere.com", replacements, body, new System.Web.UI.Control());

Instead of having the HTML inside the code, you could easily have it in your database or as a file on the computer. That will also enable you to edit the look and feel of the HTML template at any time, without having to rebuild and deploy your application.

MailDefinition is located in the System.Web assembly, so don’t forget to add reference to that from your project.

Unit test for verifying references from DataAnnotation validation to the ErrorMessageResourceName value

Martin Normark — Thu, 04 Mar 2010 17:52:00 +0000

I love the new model validation features in System.ComponentModel.DataAnnotations. One thing I don’t like though, is that the ErrorMessageResourceName is loosely typed. The ErrorMessageResourceType, however, is a System.Type which will be strongly typed by assigning its value using the typeof(Namespace.ResourceSetType) method.

Since there’s no build-breaking reference between a resource file and the value of the ErrorMessageResourceName on all classes where you use it, I thought it would be cool to have a unit test that verifies the existence of all referenced resource keys.

Remember to add a reference to System.ComponentModel.DataAnnotations.

Code

/// 
/// Verifies that all properties that are decorated with validation data-annotations, refers to 
/// an existing resource. This will make sure, that missing resources are not referenced.
/// 
[TestMethod]
public void All_Properties_With_Validation_Annotations_Must_Refer_To_Existing_Resource()
{
    Assembly assembly = Assembly.Load(new AssemblyName("MyApp.Model.Namespace"));
    var types = assembly.GetTypes().Where(t => t.IsClass && !t.IsAbstract);

    foreach (var type in types)
    {
        var properties = type.GetProperties();

        foreach (PropertyInfo property in properties)
        {
            var attributes = property.GetCustomAttributes(true);

            foreach (var item in attributes)
            {
                if (item is ValidationAttribute)
                {
                    ValidationAttribute val = item as ValidationAttribute;

                    Assert.IsNotNull(val);

                    if (val.ErrorMessageResourceType != null)
                    {
                        Assert.AreNotEqual(String.Empty, val.ErrorMessageResourceName,
                            String.Format(@"Validation Error Resource specified on property:
                        {0}.{1} is empty!", type.ToString(), property.Name));

                        try
                        {
                            ResourceManager rm = new ResourceManager(val.ErrorMessageResourceType);
                            string resourceValue = rm.GetString(val.ErrorMessageResourceName);
                            Assert.IsFalse(String.IsNullOrEmpty(resourceValue),
                                String.Format(@"The value of the Validation Error Resource specified on property:
                            {0}.{1} is empty!", type.ToString(), property.Name));
                        }
                        catch (MissingManifestResourceException)
                        {
                            Assert.Fail(String.Format(@"Validation Error Resource specified on property:
                            {0}.{1} could not be found!", type.ToString(), property.Name));
                        }
                    }
                }
            }
        }
    }
}

Multiple SSL certificates on IIS using host headers

Martin Normark — Thu, 04 Mar 2010 00:35:00 +0000

In IIS SSL sites have seemed to be limited to only one site per network interface, since you (from IIS Manager) cannot specify a host header binding on the HTTPS protocol.

It turns out, that it is only a limitation in the UI. So to have e.g. two sites with their own dedicated SSL certificate we need to add a host header binding on port 443 from either appcmd, managed code or by editing the applicationHosts.config file.

I like managed code the most, so I’ve written a small method in C# that does the trick. You need to have two SSL certificates named www.ssl1.com and www.ssl2.com installed on the machine. I just created a self signed certificate for both of them using the IIS Manager.

using System.Security.Cryptography.X509Certificates;
using Microsoft.Web.Administration;

namespace IisSsl
{
    class Program
    {
        static void Main(string[] args)
        {
            using (ServerManager _serverManager = new ServerManager())
            {
                string siteName = "SSL2";
                string certName = "www.ssl2.com";

                X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
                store.Open(OpenFlags.ReadOnly);

                X509Certificate2 certificate = store.Certificates[0];

                Site site = _serverManager.Sites[siteName];

                if (site != null)
                {
                    site.Bindings.Add("*:443:" + certName,
                        certificate.GetCertHash(), store.Name);
                }
                store.Close();

                _serverManager.CommitChanges();
            }
        }
    }
}

Remember to add a reference to C:\Windows\System32\inetsrv\Microsoft.Web.Administration.dll in order to use the ServerManager class.

Search Twitter from C# using LINQ to XML

Martin Normark — Mon, 16 Mar 2009 21:28:08 +0000

In some applications, it could be cool to have a feature that enabled the user to quickly get a glimpse of what people are saying on Twitter about the user or their product, service, company etc.

For instance, a service like GetSatisfaction.com has a feature just like that. They call it Overheard, and this is what it looks like:

There’s nothing like Twitter to give you feedback. I think MediaTemple felt the effect of unhappy customers on Twitter when their servers broke down, and stayed there for more than two days!

Anyway. I wanted to search from C#, and get back a DataTable. Here’s how it’s done:

    /// 
    /// Searches Twitter for the specified query.
    /// 
    /// The query.
    /// Returns the search results as a DataTable
    public DataTable Search(string query)
    {
      DataTable dt = new DataTable();
      dt.Columns.Add("text");
      dt.Columns.Add("html");
      dt.Columns.Add("pubdate");
      dt.Columns.Add("id");
      dt.Columns.Add("link");
      dt.Columns.Add("authorname");
      dt.Columns.Add("authorlink");

      XDocument tweetResults = XDocument.Load(String.Format(

      "http://search.twitter.com/search.atom?q={0}", HttpUtility.UrlEncode(query)));

      XNamespace atomNS = "http://www.w3.org/2005/Atom";
      var q = from tweet in tweetResults.Descendants(atomNS + "entry")
              select new
              {
                Text = (string)tweet.Element(atomNS + "title"),
                Html = (string)tweet.Element(atomNS + "content"),
                DatePublished = DateTime.Parse((string)tweet.Element(atomNS + "published")),
                Id = (string)tweet.Element(atomNS + "id"),
                Link = (string)tweet.Elements(atomNS + "link")
                .Where(link => (string)link.Attribute("rel") == "alternate")
                .Select(link => (string)link.Attribute("href"))
                .First(),
                Author = (from author in tweet.Descendants(atomNS + "author")
                          select new
                          {
                            Name = (string)author.Element(atomNS + "name"),
                            Uri = (string)author.Element(atomNS + "uri"),
                          }).First()
              };

      foreach (var item in q)
      {
        dt.Rows.Add(item.Text, item.Html, item.DatePublished, item.Id, item.Link,

                    item.Author.Name, item.Author.Uri);
      }

      return dt;
    }

Automatically translate Global and Local Resource (resx) files

Martin Normark — Fri, 13 Mar 2009 22:31:14 +0000

Yesterday, I blogged about how you can use Google Translate to translate a string in C#. To make it more useful than just a simple translator, and because I need to translate some Global Resource files for an E-commerce website that I’m working on, I wanted to create a small Windows Application in C# that could read a Global Resource file (.resx) and translate it into a selected language using the method for translating a word in C# that i blogged about yesterday.

This is how it looks so far. You simply select the resource file you want to translate. Select the current language of the resource file in the middle box, and select the language you want to translate it to in the last box. Click Translate at it should work. The new resource file will be saved in the same location as the application itself.

Translate text in C#, using Google Translate

Martin Normark — Thu, 12 Mar 2009 00:14:26 +0000

*** This post is no longer up-to-date. Take a look at my new post, revisiting how to tranlate text in C# using Google Translate ***

Sometimes, it would be great to be able to translate a text from e.g. English to Danish directly from C#. This could be useful when you want to translate a Resource file into another language.

Google Translate is awesome. There’s also Windows Live Translator, but Microsoft are far behind Google (also) in this game.

Code:

using System;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

namespace Utilities
{
  public static class Translator
  {
    /// 
    /// Translates the text.
    /// 
    /// The input.
    /// The language pair.
    /// 
    public static string TranslateText(string input, string languagePair)
    {
      return TranslateText(input, languagePair, System.Text.Encoding.UTF7);
    }

    /// 
    /// Translate Text using Google Translate
    /// 
    /// The string you want translated
    /// 2 letter Language Pair, delimited by "|". 
    /// e.g. "en|da" language pair means to translate from English to Danish
    /// The encoding.
    /// Translated to String
    public static string TranslateText(string input, string languagePair, Encoding encoding)
    {
      string url = String.Format("http://www.google.com/translate_t?hl=en&ie=UTF8&text={0}&langpair={1}", input, languagePair);

      string result = String.Empty;

      using (WebClient webClient = new WebClient())
      {
        webClient.Encoding = encoding;
        result = webClient.DownloadString(url);
      }

      Match m = Regex.Match(result, "(?<=)(.*?)(?=
)");

      if (m.Success)
        result = m.Value;

      return result;
    }
  }
}

The translated string is fetched by the RegEx close to the bottom. This could of course change, and you have to keep it up to date.

Professional translations - even via API!