As I work through the customizations for the customer portal.  I am very impressed with the OOB functionality that is already in this version as opposed to what was available with eService.

For eService I had to add features like, displaying both Closed and Active cases and add the filter functionality.  I was very pleased to see this type of thing was already in the Customer Portal.

Another feature that was not available was for documents that were attached as a notes for service cases.  It was fairly easily to add this functionality to eService and I was very excited to see that this functionality appeared available in Customer Portal.  Well not exactly.  I have not verified this completely but the link in the code resolved to _entity/annotation/Guid .  After scouring the code, the pages templates, links, and pretty much everywhere I could not find where this was supposed to be going.  It is possible that something was configured incorrectly, but with time of the essence in an upgrade situation, I decided to rework the code I wrote for eService.

First you will need to change the URL on the editcase.aspx page to point to the page we are going to create.  I commented out the line of code that was there and the second line is the code that points to our new page.

<%--<asp:HyperLink CssClass="note-attachment" NavigateUrl='<%# (Container.DataItem as Entity).GetRewriteUrl() %>' Visible='<%# Eval("FileSize") != null %>' runat="server"><%# Eval("FileName") %>&nbsp;(<%# Eval("FileSize") %>)</asp:HyperLink>--%>
 <asp:HyperLink ID="HyperLink1" CssClass="note-attachment" NavigateUrl='<%# Eval("AnnotationId", "~/pages/eservice/download.aspx?annotationid={0}") %>' Visible='<%# Eval("FileSize") != null %>' runat="server"><%# Eval("FileName") %>&nbsp;(<%# Eval("FileSize") %>)</asp:HyperLink>

Then I added a page to my Customer Portal Project called download.aspx.  Then I removed all code from the page except for the declaration at the top of the page.  In the code we are going to use the Response.OutPutStream.Write to basically convert this page to the document you are downloading.

below is the only line of code necessary for aspx page.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="download.aspx.cs" Inherits="Site.Pages.eService.download" %>

then in the code behind:

using Microsoft.Xrm.Sdk.Client;
using Microsoft.Xrm.Sdk.Query;
using Xrm;
using System.Linq;
using Microsoft.Xrm.Portal.Access;
using Microsoft.Xrm.Portal.Cms;
using Microsoft.Xrm.Portal.Core;
namespace Site.Pages.eService
{
   public partial class download : PortalPage
   {
    private Guid _annotationId;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!String.IsNullOrEmpty(Request.QueryString["annotationid"]))
           {
             _annotationId = new Guid(Request.QueryString["annotationid"]);
            }
           //create a new context to the Xrm to pull the annotationset back
           var contextnote = new Xrm.XrmServiceContext("Xrm");
           var retrievedAnnotation = (
                 from note in contextnote.AnnotationSet
                 where note.AnnotationId == _annotationId
                 select new
                {
                  note.FileName,
                  note.DocumentBody,
                  note.FileSize,
                  note.MimeType
                 }
            );
      //loop thorugh the return to create the out put stream.
      foreach (var annotation in retrievedAnnotation)
      {
          Response.ContentType = annotation.MimeType;
          byte[] buffer = Convert.FromBase64String(annotation.DocumentBody);
          int filesize = buffer.Length;
          Response.AddHeader("content-disposition", "attachment; filename=" + annotation.FileName);
          Response.OutputStream.Write(Convert.FromBase64String(annotation.DocumentBody), 0, filesize);
      }
    }
  }
}

So in the code you are requesting the GUID from url and then passing that to the linq to sql querry which brings back all the infromation you need to generate the document.

Feel free to comment and let me know what you think.