New ASP.NET Goodies

by agrace 15. July 2007 17:52

Top of the list is the ASP.NET Futures release which is now available for download. The new Media Control is particularly helpful because up to now many developers had to purchase third party controls to present video in websites. The Browser History and Back Button Support is also being addressed for those of you interested in Ajax. This is an early developer preview, so you may not want to install it on your main development machine.

Speaking of Ajax, be sure to check out the new ASP.NET Ajax Control Toolkit as well as a host of new instructional videos and articles.

The new ASP.Net RSS Toolkit Version 2 has been released and enables ASP.NET applications to consume and publish RSS feeds. [More]

Some new tutorials have been added to ASP.NET Data Tutorials series.

Last but not least, get an early look at Visual Studio 2008 (aka Orcas). The official release of the 2008 line of products (Visual Studio 2008, Windows Server 2008 and SQL Server 2008) will be in Las Vegas next February.

View other SharePoint posts...

I've recently been assigned the task of setting up and documenting the SharePoint development environment. If you were dismayed by the vagaries of the installation process, you've seen nothing yet. Although SharePoint is built upon ASP.NET, this is an Office product. The Office team have always been the cash cow of Microsoft. Apparently, their priority was to make this product user friendly. And if your company is so large as to have thousands of sites, I can see no better choice than SharePoint. It really scales better than anything out there.

For smaller companies with in-house development teams, there is still a huge hole in this market and it will be filled by someone. Very few users will get to see how "friendly" it is if the IT people determine that it's too much of a pain to develop on. Not only that, but very few IT teams have the expertise required to do this properly anyway. Training in this area has been pretty non-existent up to recently. Some months back, I attended a MOSS boot camp which was one of the very first in the United States. It focused only on the installation and administration of SharePoint. If you are a developer like myself, then for the most part, you are pretty much on your own.


The Bottom Line:

  * You have to develop locally for debugging and testing
  * You need SharePoint/WSS on your local machine
  * SharePoint/WSS needs Windows Server 2003 SP1 to run
  * You need to use virtual machine(s) locally to host Windows Server 2003
  * You may need to bump up RAM (4 Gb) and possibly add a fast external drive
  * TFS support will not be available until the Orcas release


Everything You Need to Know:

  * Use Virtual PC Differencing Disks to your Advantage
  * MOSS 2007 Development - Virtual Server Set Up
  * Team-Based Development in MOSS
  * Development Tools and Techniques for Working with Code in WSS 3.0
  * How to Create a MOSS 2007 VPC Image - the Whole 9 Yards



I will be implementing the development environment myself and will report back on the outcome. I am going to set up initially with Virtual PC VHDs and difference files on a test machine and work from there. Eventually, I will deploy to a staging server which will be an exact duplicate of the live server. As for source control, I will have to wait until the Orcas release and start all over again. There is a TFS Beta 1 available for those who are interested. Note that you can still save your Web Parts in the current version of TFS. There are hacks to getting the current version of TFS to work with MOSS solutions but it's supposed to be so involved as to not warrant the time spent on it. Also, some people are saying that VMWare is faster that Virtual PC (Virtual Server if you have the license) but I am trying to get some benchmarks to support this. I can't wait to actually sit down and build something!

DataReader or DataSet?

by agrace 25. June 2007 21:30

I'm not trying to re-ignite this age-old debate but am merely using it as a starting point to explore the data access options available to date and where we may be heading in the near future. In the next post, I will look at multi-tier design and the use of custom entity class objects. Later on, we may look at that new animal called LINQ. I recommend the following as an introduction to ADO.NET:

Best Practises for Using ADO.NET

Working with Data in ASP.NET 2.0 

Many programmers mistakenly view the DataSet as the only real option for data access as far as Web applications are concerned. We often choose between DataReader and DataSet based either on our familiarity with the syntax of one over the other or our lack of understanding of the basic differences between them. More often than not, we usually end up using the wrong data access method for the wrong reasons. People typically see it as a simple choice: the DataReader for speed and the DataSet for data manipulation. In reality, the choice involves a whole range of trade-offs. As an overview, here are the basic characteristics of the both DataReader and the DataSet:


  * Connected
  * Quick
  * Forward-only, read-only access
  * One row at a time is stored in memory and either written over or discarded
  * Light on resources such as IIS
  * Cannot be persisted to cache or session
  * Holds on to the data connection


  * Disconnected
  * Read-write
  * Can navigate backwards and forwards
  * Stores all data in memory
  * More intense use of IIS and memory resources
  * Connections closed immediately the data is gathered
  * Relational-data-aware; can consist of collections of related tables
  * Can make updates back to the database
  * Data can be stored in session

Things We Tend to Forget:

  * To close the DataReader and/or Connection
  * Data-bound controls keep their own copy of any data to which they are bound
  * To use the DataReader's HasRows and IsDBNull properties to avoid errors
  * To use the DataReader for simple data-binding where no caching of data is necessary
  * With DataSets, primary keys and relationships have to be re-created in code
  * DataSets support data transactions and data filtering
  * Unlike DataReaders, DataSets support binding to multiple controls
  * DataSets can be used to manipulate the data as XML

If there is one lesson to be learned here, it is not to make snap decisions when it comes to choosing between these two data access models. You need to think it through each and every time you are accessing the database and binding to a control. The DataReader may be fast but it doesn't support binding to multiple controls. So, you won't gain much mileage from trying to use it to sort and filter with rich controls. The DataSet is particularly useful when used to intermittently connect to the database as with salespeople on the road. The data can be serialized to XML and stored offline.

I mentioned that data-bound controls keep their own copy of the data to which they are bound: by my calculations, that makes for three distinct copies of the data when using a DataSet; any questions?!!