Create an Operation Sequence Component in Commerce Server 2009

1. Create a class that inherits OperationSequenceComponent class.
2. Add the following library in the includes
• Microsoft.Commerce.Providers.Components;
• Microsoft.CommerceServer.Runtime.Orders;
• Microsoft.Commerce.Contracts.Messages;
• Microsoft.Commerce.Broker;
• Microsoft.Commerce.Common.MessageBuilders;
• Microsoft.Commerce.Contracts;
3. Override one of the following methods inside OperationSequenceComponents
• ExecuteQuery – Should be override if you intend to Query an Entity.
• ExecuteCreate – Should be override if you intend to Add a new entry to the Entity.
• ExecuteUpdate – Should be override if you intend to Update an existing Entity.
• ExecuteDelete – Should be override if you intend to Delete an existing Entity.
Each methods has a parameter of CommerceUpdateOperation, OperationCacheDictionary, and CommerceUpdateOperationResponse. Each parameter is self explanatory but I will try to explain.
CommerceUpdateOperation holds the information of the entity that you want to create, read, update or delete (CRUD). These are the Model information or the searched entity.
OperationCacheDictionary hold the current information of the Entity you want to create, read, update or delete (CRUD). These information are saved to cache and the data is serialized, and these data will be used in the other OperationSequenceComponent. Either read, or updated.
CommerceUpdateOperationResponse holds the information you want to return to the calling Method. In Commerce Foundation, you can specify what related model of the Entity you want to return.
4. If you have completed your class. Add it in the OperationSequence of the right MessageHandler in ChannelConfiguration.config where you want to add your Component. Say if you want to add a Component when you update and Entity for example Basket, the right MessageHandler should be CommerceUpdateOperation_Basket. Each component added in the Operation Sequence is hierarchal . The component that you add should be in a signed library.

ASP.MVC JS script source and CSS files not mapped correctly

I've meet a lot of questions regarding why CSS and JS attachments to an ASP.NET MVC page sometimes found in some page but not in other pages specially when you add a 4th segment to your url.

For example, your URL is

http://localhost/Home/Page/Article/1

Certainly, the CSS and javascripts files will not work correctly on this pages since ASP.NET MVC attached those files by default like this.

<script type="text/javascript" language="javascript" src="../../Scripts/jquery-1.4.1.js"></script>

Where it is mapped 2 levels higher of the Scripts folder. So when the parser looks for the included js script from the stated url it will look 2 levels higher only of the last segment which is 1. But your Url has 4 levels or segments which the parser ends up looking at the /Home segment and the actual JS file is in the root of your URL.

My solution for this is to create a base url instead of mapping it with ../../ I would create a helper that will generate a link tag or script tag for my CSS and my javascripts

Helper.cs

public static string GenerateCSSLink(this HtmlHelper helper, string cssPath)
{ 
      var request = helper.ViewContext.RequestContext.HttpContext.Request;
      string baseUrl = request.Url.Scheme + "://" + request.Url.Host + (request.Url.Port == 80 ? "" : ":" + request.Url.Port.ToString()) + "/";
      string url;
      if (cssPath.StartsWith("/"))
      {
          url = baseUrl + cssPath.Substring(1);
      }
      else
      {
          url = baseUrl + cssPath;
      }
      string link = "<link href=\"" + url + "\" rel=\"stylesheet\" type=\"text/css\" />";

      return link; 
}

In my Master page where I have included my CSS and Scripts I will import the namespace of my Helper.cs and I can now call

<%=Html.GenerateCSSLink("/Content/Site.css") %>