ASP
Active Server Pages (ASP) is Microsoft's server-side technology for dynamically-generated web pages that is marketed as an add-on to Internet Information Services (IIS). Programming ASP websites is made easier by various built-in objects. Each object corresponds to a group of frequently-used functionality useful for creating dynamic web pages. In ASP 3.0 there are six such built-in objects: Application, ASPError, Request, Response, Server and Session. Session, for example, is a cookie-based session object that maintains variables from page to page. Application Center Test is also available for load testing. Most ASP pages are written in VBScript, but any other Active Scripting engine can be selected instead by using the @Language directive. JScript (Microsoft's implementation of ECMAScript) is the other language that is usually available. PerlScript (Perl) and others are available as third-party installable Active Scripting engines
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Now, after the very futile example which accompanied the introduction to JavaScript Object Notation in my last post (by the way, I forgot to mention that this is what the fancy acronym stands for, but I'm sure you already knew that), let's go straight to the fun part, and see how we can leverage the flexibility of JSON (and ASP.NET AJAX, of course) to achieve some less trivial result. When developing a web application, we often need to aggregate data from different sources. You might argue this is no big news, as we've all used web services in a way or the other, and "mashup" is surely not an uncommon word these days.
If you are a web developer, and you haven't been living under a rock for most of the past year, you must at least have heard of JSON. In the wake of the tremendous hype relating to everything even vaguely AJAX-related, JSON ha way to understand AJAX syntaxas climbed in record time the list of the top 10 technologies a web developer has to master.
There are certain things you should take into account when you are developing your applications. Over the last 12 years or so of working with asp and asp.net, I have learned to avoid and do certain things that increase your application performance by a massive amount! Below are my top 20 tips to improving ASP.net application Performance.
Sometimes, while troubleshooting I am interested to find out all the details about certain collections in ASP.NET, like Forms, QueryStrings, Headers, ServerVariables, Cookies, Sessions and Params... I created a very simple aspx page which would show you all the details...
Not a comprehensive list as I simply can't type and keep up with what's going on - these things are coming thick and fast.... (disclaimer - I'm typing this on the fly so check the docs - it may not be 100% accurate).
See also part 1 and part 2.
So we're at the point where we've set up our environment, we've created a project structure and we've managed to call the membership service to authenticate users. What about if I want to make use of the (very useful) Profile store in ASP.NET. The Profile store allows me to maintain strongly typed data about users of my site that will be persisted for me automatically (typically a database such as SQL Server).
In part 1, we set ourselves up for success by creating the necessary project structure, xaml file and changes to web.config to enable application services for script access. Oh, and I mentioned you need ASP.NET AJAX on your web server as we'll be needing that JSON serialisation stuff it can do for you.
A chance conversation at the NxtGenUG got me to thinking about whether you could access the ASP.NET. Membership service and Profile service from Silverlight managed code. As ASP.NET AJAX allows you to expose these to JavaScript (using JSON serialisation) then it seemed perfectly feasible that you would be able to do this. So I had a go...
Let's take an ordinary DataGrid, add a TemplateColumn to its Columns collection, and place a RadioButton control within this column (it can be useful when you would like to provide the user with selection from the DataGrid items). See the code below:
Wednesday, 18 April 2007 |
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Junaid
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