European ASP.NET MVC 4 and MVC 5 Hosting

BLOG about ASP.NET MVC 3, ASP.NET MVC 4, and ASP.NET MVC 5 Hosting and Its Technology - Dedicated to European Windows Hosting Customer

HostForLIFE.eu Proudly Announces ASP.NET MVC 5.1.1 Hosting

clock February 28, 2014 10:54 by author Peter

European Recommended Windows and ASP.NET Spotlight Hosting Partner in Europe, HostForLIFE.eu, has announced the availability of new hosting plans that are optimized for the latest update of the Microsoft ASP.NET MVC 5.1.1 technology.  HostForLIFE.eu - a cheap, constant uptime, excellent customer service, quality and also reliable hosting provider in advanced Windows and ASP.NET technology. They proudly announces the availability of the ASP.NET MVC 5.1.1 hosting in their entire servers environment.

HostForLIFE.eu hosts its servers in top class data centers that is located in Amsterdam to guarantee 99.9% network uptime. All data center feature redundancies in network connectivity, power, HVAC, security, and fire suppression. All hosting plans from HostForLIFE.eu include 24×7 support and 30 days money back guarantee. You can start hosting your ASP.NET MVC 5.1.1 site on their environment from as just low €3.00/month only.

ASP.NET MVC 5.1.1  is the latest update to Microsoft's popular MVC (Model-View-Controller) technology - an established web application framework. MVC enables developers to build dynamic, data-driven web sites. ASP.NET MVC 5.1.1 adds sophisticated features. ASP.NET MVC 5.1.1  gives you a powerful, patterns-based way to build dynamic websites that enables a clean separation of concerns and that gives you full control over markup. For additional information about ASP.NET MVC 5.1.1 Hosting offered by HostForLIFE.eu, please visit http://hostforlife.eu/European-ASPNET-MVC-511-Hosting

About HostForLIFE.eu

HostForLIFE.eu is an European Windows Hosting Provider which focuses on the Windows Platform only. HostForLIFE.eu deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.



European ASP.NET MVC 5 Hosting - Nederland :: How to Fix SimpleSecurity Error when Upgrading from MVC 4 to MVC 5

clock February 28, 2014 06:56 by author Scott

You will face this weird issue when you upgrade SimpleSecurity from MVC 4 to MVC 5 and this is an issue that you’ll see:

Attempt by security transparent method 'WebMatrix.WebData.PreApplicationStartCode.Start()' to access security critical method 'System.Web.WebPages.Razor.WebPageRazorHost.AddGlobalImport(System.String)' failed.

I did some research and found that others were having the same issue. Well it turns out I did not follow the instructions exactly.  Here is one note in the instructions I did not pay close attention to.

Note
: Microsoft-Web-Helpers has been replaced  with Microsoft.AspNet.WebHelpers. You should remove the old package first,  and then install the newer package.


I opened up the NuGet Package Manager and installed the package Microsoft.AspNet.WebHelpers and things started to work.  Note that when you create a new MVC 5 application and try to incorporate SimpleSecurity or SimpleMembership you will hit the same issue because Microsoft.AspNet.WebHelpers  is not installed by default.  It has to be present for SimpleMembership to run correctly.

I verified that all of the features in the reference application are working correctly after the upgrade.  Even the generation of the emails using Postal worked, which I was not sure of because of the upgrade of Razor as well.

One change I needed to make to the SimpleSecurity assembly was to remove the filters AuthorizeAttribute and BasicAuthorizeAttribute and put them in a separate assembly.  I did this because they are dependent upon MVC and Web API assemblies.  So now there is a version for MVC 4 and another for MVC 5. Please check https://simplesecurity.codeplex.com/SourceControl/latest for SimpleSecurity Project Source Code. Hope it helps



ASP.NET MVC Hosting - HostForLIFE.eu :: How to Localization URL With ASP.NET MVC 4 ?

clock February 21, 2014 09:52 by author Peter

To offer a website in multiple languages using ASP.NET MVC 4 , we simply need to add some resource.resx files to our project. Based on the language of the browser, IIS will match the localization resource. However, what if we want to give the choice to the user?

The goal

One pattern often used to achieve this, is to split the resource based on the URL. Example:
http://www.DomainName.com/EN/About for the English path
http://www.DomainName.com/FR/About for the French path

The needs

We will need something to grab the desired language from the URL and set it as the current language.

The Solution

First, let's add a new route. Asp.Net uses routing to parse the URL and to extract information from it, while keeping the displayed URL more user friendly. The default route is {controller}/{action}/{id}.

So without a new route, our language will be treated as a Controller name; but that’s no good.
The route we want is {lang}/{controller}/{action}/{id}. We could just replace the default, but then what would happen to "normal" calls?

The best thing to do is to add our localized route first and keep the default second. The way the routing works, it will use the first route that matches. Since we will use the two-letter code for chosen language, lets add the first part {lang}, which must be two characters long to be considered valid. You can see this in the code where I define a constraint using the following Regex: "^[a-zA-Z]{2}$".

Now that we have the language, we must change the user interface culture of the current thread. I decided to use an Attribute, making it easy to use. Under the Filter folder add a new class which inherits from ActionFilterAttribute. This method will check if "lang" is available from RouteData. If lang is present it will change the currentUICulture of the current thread. If "lang" is not part of the URL, then it will set it to the default.

We could put the [Localization] attribute on all controller classes, but a best practice is to create a BaseController class and use it there.

 

You can now change the language of the entire website by changing the URL.

Use it everywhere

To use it in the view and the controller it's easy; just add the namespace and just type Resources.NameOfYourResourceString.
To use it in the validation and the generated code from the model, we could use something like this:

This way, in the view, the code will still stay clean and simple.

@Html.LabelFor(model.UserName)



European HostForLIFE.eu Proudly Launches Windows Server 2012 R2 Hosting

clock February 17, 2014 10:22 by author Peter

HostForLIFE.eu proudly launches the support of Windows Server 2012 R2 on all their newest Windows Server environment. On Windows Server 2012 R2 hosted by HostForLIFE.eu, you can try their new and improved features that deliver extremely high levels of uptime and continuous server availability start from €3.00/month.

Microsoft recently released it’s latest operating system Windows Server 2012 R2 to global customers. Microsoft Windows Server 2012 R2 is much more than just another service pack; adding new features that make it easier to build cloud applications and services in your datacenter.

Delivering on the promise of a modern datacenter, modern applications, and people-centric IT, Windows Server 2012 R2 provides a best-in-class server experience that cost-effectively cloud-optimizes your business. When you optimize your business for the cloud with Windows Server 2012 R2 hosting, you take advantage of your existing skillsets and technology investments.

You also gain all the Microsoft experience behind building and operating private and public clouds – right in the box. Windows Server 2012 R2 offers an enterprise-class, simple and cost-effective solution that’s application-focused and user centric.

Further information and the full range of features Windows Server 2012 R2 Hosting can be viewed here: http://hostforlife.eu/European-Windows-Server-2012-R2-Hosting

About Company
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. HostForLIFE.eu deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.



ASP.NET MVC Hosting - HostForLIFE.eu :: Attribute Routing With ASP.net MVC 5 - Route Constraints

clock February 5, 2014 17:09 by author Peter

This Article shows how to use the Latest ASP.net MVC 5 Attribute Routing's Route Constraints with your Application. You can read the first part of this Article here 'Attribute Routing With ASP.net MVC 5. If you want to be more familiar with ASP.NET MVC 5, you should try HostForLife.eu.

How to set Route Constraints ?
It allows you to restrict the parameters in the route template are matched
The syntax is {parameter:constraint}

PetController.cs

public class PetController : Controller
{
[Route("Pet/{petId:int}")]
public ActionResult GetSpecificPetById(int petId)
{
return View();
}
}

Key points of the above code:
- In the above example, /Pet/8 will Route to the “GetSpecificPetById” Action.
- Here the route will only be selected, if the "petId" portion of the URI is an integer.
Above Route on Browser is as below

The following diagram shows the constraints that are supported

How to apply multiple constraints to a parameter ?

You can apply multiple constraints to a parameter, separated by a colon.
Well,It's like this  [Route("Pet/{petId:int:min(1)}")]

PetController.cs

public class PetController : Controller
{
[Route("Pet/{petId:int:min(1)}")]
public ActionResult GetSpecificPetById(int petId)
{
return View();
}
}


Key points of the above code
In the above example,You can't use  /Pet/10000000000 ,because it is larger than int.MaxValue
And also you can't use /Pet/0 ,because of the min(1) constraint.

How to Specifying that a parameter is Optional ?
You can do it by Specifying that a parameter is Optional (via the '?' modifier).
This should be done after inline constraints.
Well,it's like this  [Route("Pet/{message:maxlength(4)?}")]

PetController.cs

// eg: /Pet/good
[Route("Pet/{message:maxlength(4)?}")]
public ActionResult PetMessage(string message)
{
return View();
}


Key points of the above code
In the above example, /Pet/good and /Pet will Route to the “PetMessage” Action.
The route /Pet also works hence of the Optional modifier.
But /Pet/good-bye will not route above Action , because of the maxlength(4) constraint.

Above Routes on Browser are as below



ASP.NET MVC 5 European Hosting - HostForLIFE.eu :: Authentication Filters in ASP.NET MVC 5

clock February 4, 2014 07:18 by author Peter

Filters are used to perform logic either before an action method is called or after an action method runs. Filters are custom classes that provide both a declarative and programmatic means to add pre-action and post-action behaviour to controller action methods. This topic contains only brief information about ASP.NET MVC 5. If you want to be more familiar with ASP.NET MVC 5, you should try HostForLife.eu.

Prior to ASP.NET MVC 5, there are 4 types of filters:

  1. Authorization filters (IAuthorizationFilter)
  2. Action filters (IActionFilter)
  3. Result filters (IResultFilter)
  4. Exception filters (IExceptionFilter)

Prior to ASP.NET MVC 5 we are using the [Authorization] attribute to enforce role-based security within the ASP.NET MVC applications. ASP.NET MVC 5 introduces the new Authentication filters (IAuthenticationFilter).

Authentication filters are a new kind of filter in ASP.NET MVC that run prior to authorization filters in the ASP.NET MVC pipeline and allow you to specify authentication logic per-action, per-controller, or globally for all controllers. Authentication filters process credentials in the request and provide a corresponding principal. Authentication filters can also add authentication challenges in response to unauthorized requests.
The reason for introducing authentication filters is to separate authentication from authorization (authentication first, then authorization):

  1. Authentication is for establishing a principal for current request
  2. Authorization is to verify whether or not the current principal is permitted to execute current request

We can use the IAuthenticationFilter (System.Web.Mvc.Filters) to create a custom authentication filter. Here is the definition of IAuthenticationFilter:

namespace System.Web.Mvc.Filters

{
  public interface IAuthenticationFilter
  {
    void OnAuthentication(AuthenticationContext filterContext);
    void OnAuthenticationChallenge(AuthenticationChallengeContext filterContext);  
}
}

IAuthenticationFilter interface provides two methods:
- OnAuthentication(AuthenticationContext filterContext). This method is used to authenticates the request & it provides the context to use for authentication.
- OnAuthenticationChallenge(AuthenticationChallengeContext filterContext). This method adds an authentication challenge to the current ActionResult & it provides the context to use for the authentication challenge.

We can use authentication filters to allow users to authenticate to the application from various third-party vendors (facebook, linkedin, twitter etc…) or a custom authentication provider.

If look into real implementation details by comparing IAuthorizationFilter & IAuthenticationFilter, IAuthenticationFilter’s OnAuthentication(…) method has AuthenticationContext parameter which has Principal object.

When ControllerActionInvoker class InvokeAction()  method is executed to Invoke an Action method, first it will iterate through the all Authentication filters OnAuthentication() methods. Then replace the original Principal object on the HttpContext in case if the Principal is changed by Authentication filters OnAuthentication() method.

protected virtual AuthenticationContext InvokeAuthenticationFilters(ControllerContext controllerContext,
IList<IAuthenticationFilter> filters,
ActionDescriptor actionDescriptor)
{
   if (controllerContext == null)
   throw new ArgumentNullException("controllerContext");
   IPrincipal user = controllerContext.HttpContext.User;
   AuthenticationContext filterContext = new AuthenticationContext(controllerContext,actionDescriptor, user);
   foreach (IAuthenticationFilter authenticationFilter in (IEnumerable<IAuthenticationFilter>) filters)
   {
     authenticationFilter.OnAuthentication(filterContext);
     if (filterContext.Result != null)
        break;
   }
    IPrincipal principal = filterContext.Principal;
    if (principal != user)
   {
     filterContext.HttpContext.User = principal;
     Thread.CurrentPrincipal = principal;
   }
    return filterContext;
}

This is give us ability to modify the original Principal object using authentication filter’s.  Here is the story with OnAuthenticationChallenge() method.

protected virtual AuthenticationChallengeContext
InvokeAuthenticationFiltersChallenge(ControllerContext controllerContext,
IList<IAuthenticationFilter> filters,
ActionDescriptor actionDescriptor, ActionResult result)
{
AuthenticationChallengeContext filterContext = new AuthenticationChallengeContext(controllerContext,
actionDescriptor, result);
foreach (IAuthenticationFilter authenticationFilter in (IEnumerable<IAuthenticationFilter>) filters)
authenticationFilter.OnAuthenticationChallenge(filterContext);
return filterContext;
}



About HostForLIFE.eu

HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2012 Hosting, ASP.NET 4.5 Hosting, ASP.NET MVC 5 Hosting, and SQL 2014 Hosting.


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