Maarten Balliauw {blog}

ASP.NET MVC, Microsoft Azure, PHP, web development ...

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Remix 2009 session - Slides and code

As promised during the session at Remix 2009, here’s my example code and slide deck.

Abstract: "Building a Twitter clone in 60 minutes, featuring what's new in ASP.NET MVC 2 preview 1 and focusing on some of the core ASP.NET MVC features like security and routing."

Example code can be downloaded here: ASP.NET MVC Wisdom - ReMix.zip (8.91 mb)

Thank you for attending!

Simple API for Cloud Application Services

Zend, in co-operation with IBM, Microsoft, Rackspace, GoGrid and other cloud leaders, today have released their Simple API for Cloud Application Services project. The Simple Cloud API project empowers developers to use one interface to interact with the cloud services offered by different vendors. These vendors are all contributing to this open source project, making sure the Simple Cloud API “fits like a glove” on top of their service.

Zend Cloud adapters will be available for services such as:

  • File storage services, including Windows Azure blobs, Rackspace Cloud Files, Nirvanix Storage Delivery Network and Amazon S3
  • Document Storage services, including Windows Azure tables and Amazon SimpleDB
  • Simple queue services, including Amazon SQS and Windows Azure queues

Note that the Simple Cloud API is focused on providing a simple and re-usable interface across different cloud services. This implicates that specific features a service offers will not be available using the Simple Cloud API.

Here’s a quick code sample for the Simple Cloud API. Let’s upload some data and list the items in a Windows Azure Blob Storage container using the Simple Cloud API:

[code:c#]

require_once('Zend/Cloud/Storage/WindowsAzure.php');

// Create an instance
$storage = new Zend_Cloud_Storage_WindowsAzure(
'zendtest',
array(
  'host' => 'blob.core.windows.net',
  'accountname' => 'xxxxxx',
  'accountkey' => 'yyyyyy'
));

// Create some data and upload it
$item1 = new Zend_Cloud_Storage_Item('Hello World!', array('creator' => 'Maarten'));
$storage->storeItem($item1, 'data/item.txt');

// Now download it!
$item2 = $storage->fetchItem('data/item.txt', array('returntype' => 2));
var_dump($item2);

// List items
var_dump(
$storage->listItems()
);

[/code]

It’s quite fun to be a part of this kind of things: I started working for Microsoft on the Windows Azure SDK for PHP, we contributed the same codebase to Zend Framework, and now I’m building the Windows Azure implementations for the Simple Cloud API.

The full press release can be found at the Simple Cloud API website.

Joined The Lounge network

logo Last week, I received my invitation to the Lounge network, an exclusive advertising network for “trusted and respected publishers focused on Microsoft technologies”. First of all, it’s cool to see that at least someone considers me as trusted and respected. Next, it’s probably a better advertising solution than the Amazon ads I had earlier. The Lounge will always display ads related to .NET technology, whereas Amazon had its days of displaying lamps and home furniture enhancements.

Let’s see how this works out.

ASP.NET MVC MvcSiteMapProvider 1.0 released

image Back in March, I blogged about an experimental MvcSiteMap provider I was building. Today, I am proud to announce that it is stable enough to call it version 1.0! Download MvcSiteMapProvider 1.0 over at CodePlex.

Ever since the source code release I did back in March, a lot of new features have been added, such as HtmlHelper extension methods, attributes, dynamic parameters, … I’ll leave most of them up to you to discover, but there are some I want to quickly highlight.

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ACL module extensibility

By default, MvcSiteMap will make nodes visible or invisible based on [Authorize] attributes that are placed on controllers or action methods. If you have implemented your own authentication mechanism, this may no longer be the best way to show or hide sitemap nodes. By implementing and registering the IMvcSiteMapAclModule interface, you can now plug in your own visibility logic.

[code:c#]

public interface IMvcSiteMapAclModule
{
    /// <summary>
    /// Determine if a node is accessible for a user
    /// </summary>
    /// <param name="provider">The MvcSiteMapProvider requesting the current method</param>
    /// <param name="context">Current HttpContext</param>
    /// <param name="node">SiteMap node</param>
    /// <returns>True/false if the node is accessible</returns>
    bool IsAccessibleToUser(MvcSiteMapProvider provider, HttpContext context, SiteMapNode node);
}

[/code]

Dynamic parameters

Quite often, action methods have parameters that are not really bound to a sitemap node. For instance, take a paging parameter. You may ignore this one safely when determining the active sitemap node: /Products/List?page=1 and /Products/List?page=2 should both have the same menu item highlighted. This is where dynamic parameters come in handy: MvcSiteMap will completely ignore the specified parameters when determining the current node.

[code:c#]

<mvcSiteMapNode title="Products" controller="Products" action="List" isDynamic="true" dynamicParameters="page" />

[/code]

The above sitemap node will always be highlighted, whatever the value of “page” is.

SiteMapTitle action filter attribute

In some situations, you may want to dynamically change the SiteMap.CurrentNode.Title in an action method. This can be done manually by setting  SiteMap.CurrentNode.Title, or by adding the SiteMapTitle action filter attribute.

Imagine you are building a blog and want to use the Blog’s Headline property as the site map node title. You can use the following snippet:

[code:c#]

[SiteMapTitle("Headline")]
public ViewResult Show(int blogId) {
   var blog = _repository.Find(blogIdId);
   return blog;
}

[/code]

You can also use a non-strong typed ViewData value as the site map node title:

[code:c#]

[SiteMapTitle("SomeKey")]
public ViewResult Show(int blogId) {
   ViewData["SomeKey"] = "This will be the title";

   var blog = _repository.Find(blogIdId);
   return blog;
}

[/code]

HtmlHelper extension methods

MvcSiteMap provides different HtmlHelper extension methods which you can use to generate SiteMap-specific HTML code on your ASP.NET MVC views. Here's a list of available HtmlHelper extension methods.

  • HtmlHelper.Menu() - Can be used to generate a menu
  • HtmlHelper.SiteMap() - Can be used to generate a list of all pages in your sitemap
  • HtmlHelper.SiteMapPath() - Can be used to generate a so-called "breadcrumb trail"

The MvcSiteMap release can be found on CodePlex.

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