ASP.NET Web PDF Document Viewer/Editor Control Library

Listing 10-7 shows the web service; you will notice how the basic components of the service are the same as our simple web service. You have a class definition as before, marked with the WebService attribute. The code that actually does the work is the method definition GetYeastMolecule; here you create and populate various objects that are defined in the library you created from the rnaml.xsd file, such as a molecule object and a sequence object. Listing 10-7. Creating a Web Service Returning the Definition of RNA Molecule #light namespace Strangelights.WebServices open System.Web.Services [<WebService(Namespace = "http://strangelights.com/FSharp/Foundations/DnaWebService")>] type DnaWebService = class inherit WebService new() = {} [<WebMethod(Description = "Gets a representation of a yeast molecule")>] member x.GetYeastMolecule () = let yeast = new molecule(id = "Yeast-tRNA-Phe") let id = new identity(name = "Saccharomyces cerevisiae tRNA-Phe") let tax = new taxonomy(domain = "Eukaryota", kingdom = "Fungi", phylum = "Ascomycota", ``class`` = "Saccharomycetes", order = "Saccharomycetales", family = "Saccharomycetaceae", genus = "Saccharomyces", species = "Saccharomyces cerevisiae") let numRange1 = new numberingrange(start = "1", Item = "10") let numRange2 = new numberingrange(start = "11", Item = "66") let numSys = new numberingsystem(id="natural", usedinfile=true) numSys.Items <- [|box numRange1; box numRange2|] let seqData = new seqdata() seqData.Value <- "GCGGAUUUAG CUCAGUUGGG AGAGCGCCAG ACUGAAGAUC UGGAGGUCCU GUGUUCGAUC CACAGAAUUC GCACCA" let seq = new sequence() seq.numberingsystem <- [|numSys|] seq.seqdata <- seqData id.taxonomy <- tax yeast.identity <- id yeast.sequence <- [|seq|] yeast end Again, the same simple web-based testing option is available, and the resulting XML is as follows:

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Portals are given a new life with Ajax, especially using the Draggable DOM pattern. With this approach, the individual sections are editable right on the main page, and to customize the page, you simply grab them with your mouse and drag them to their new location. Several sites, including the personalizable Google site (www.google.com/ig), have used this pattern, as shown in Figure 8-3.

When the bluesend program starts, the joystick should be in the centered position. The Raw values for the two pots are recorded as Pzero for the power and Szero for the steering, as shown in Figure 14-14. Whenever the joystick is returned to the starting position, the vehicle will be going straight but at zero speed.

< xml version="1.0" encoding="utf-8" > <molecule xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" id="Yeast-tRNA-Phe"> <identity> <name>Saccharomyces cerevisiae tRNA-Phe</name> <taxonomy> <domain>Eukaryota</domain> <kingdom>Fungi</kingdom> <phylum>Ascomycota</phylum> <class>Saccharomycetes</class> <order>Saccharomycetales</order> <family>Saccharomycetaceae</family> <genus>Saccharomyces</genus> <species>Saccharomyces cerevisiae</species> </taxonomy> </identity> <sequence> <numbering-system id="natural" used-in-file="true"> <numbering-range> <start>1</start> <end>10</end> </numbering-range> <numbering-range> <start>11</start> <end>66</end> </numbering-range> </numbering-system> <seq-data>GCGGAUUUAG CUCAGUUGGG AGAGCGCCAG ACUGAAGAUC UGGAGGUCCU GUGUUCGAUC CACAGAAUUC GCACCA</seq-data> </sequence> </molecule> Although this example, just returning a static unchanging XML document, is not particularly realistic, it is easy to see the potential of this sort of application. Instead of a GetYeastMolecule method, you d more realistically provide a GetMolecule method that took a name of a molecule, looked the details of the molecule up in a database, and returned the resulting molecule data. The advantage is that a program running on almost any platform can work with the resulting data; in this case, the example site already provides an API for working with the data in C++ and Java, and as you have seen, working with this kind of data in F# is already very straightforward. Of course, this technology is not limited to molecular biology; there are XML schemas becoming available for almost every field of science, engineering, math, and finance. Web services such as these can be secured so that they can be accessed only by a subset of users or so that the information traveling over the network is encrypted or signed, via several methods. One option is to upgrade to Windows Communication Foundation (WCF), which is similar to web services but offers more flexibility in this area, discussed in the next section. The other is to configure your web server to handle these security requirements for you. I ll

We ve provided you with the tools you ll need to make Ajax development easier, but you also need to be aware of some common gotchas. You may not run into more than a couple of these issues, but before you start using Ajax everywhere, you should keep the following in mind:

discuss these options as well as several troubleshooting options in the section IIS Configuration and Troubleshooting Guide.

Figure 14-14. Remote-control bluesend program initialization Figure 14-15 shows the main loop of the bluesend program, which reads each of the joystick pots and subtracts the initial positions. The values tend to be too large for the Motor block in the vehicle, so they re divided by 5. These two values are sent to Bluetooth connection 1 and to mailboxes 1 and 2. It s up to the remote-control vehicle to receive these values and convert them into speed and steering commands.