.NET/Java PDF, Tiff, Barcode SDK Library

which offers the same narrow set of features but makes slightly more efficient use of network bandwidth than the XML-based basic profile. So if you want a Silverlight client to use WCF to communicate with a non-.NET web service, as Figure 13-2 illustrates, this will work only if your service supports the basic profile.

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The biggest difference between Mac OS X and the other platforms supported by Qt is the ability to run the same application on several processor platforms. The processors available, PowerPC and Intel x86, have many differences most troublesome is the endianess. Make sure to always use Qt streams to load and store data not only to files but also to databases, network streams, and other buffers that can be read and written by both processors. The problem exists in the order of the bytes in multibyte values. For instance, a 32-bit integer reading 0x12345678 on one of the platforms will be read as 0x78563412 on the other if you do not decide which endianess to stick to. When configuring Qt on the Mac OS X platform, you can use the -universal flag, which makes it possible to create universal binaries. You control which processors to support using the CONFIG variable and the ppc and x86 values. Typing CONFIG += x86 ppc creates a universal project that can be executed on either platform.

More surprisingly, similar restrictions exist with a WPF XBAP. Even though XBAPs use the full version of the .NET Framework, certain features of WCF are disabled for security purposes client code in web browsers shouldn t have complete freedom to connect to anywhere on the Internet, because that would make life too easy for hackers.

So WCF offers only a very limited version of its services to NET applications running inside web browsers, meaning that XBAPs have similar WCF limitations to Silverlight If you re writing a Silverlight client and you want to talk to a service that does not conform to the web services basic profile, that s not necessarily a showstopper It just rules out WCF you will need to use the lower-level web-based APIs instead, or even the socket APIs, depending on the service Note that while WCF is usually a good default choice on the server side for web applications with client-side code, there are a few cases where you might not want to use it ASPNET provides its own mechanism for supporting AJAX clients, and while it s considerably less flexible than WCF, you might not need the flexibility.

This information is ultimately sourced from Yahoo as CSV over HTTP This CSV file is . returned from a call to the iFinance server at Yahoo using a URL call like this: http://ichart.finance.yahoo.com/table.csv s=MSFT&d=2 &e=4&f=2006&g=d&a=2&b=13&c=1986&ignore=.csv This returns a CSV file whose format is like this: Date,Open,High,Low,Close,Volume,Adj. Close* 3-Mar-06,26.81,27.16,26.74,26.93,45218800,26.93 2-Mar-06,27.02,27.10,26.90,26.97,41850300,26.97 1-Mar-06,26.98,27.20,26.95,27.14,53061200,27.14 28-Feb-06,26.95,27.30,26.87,26.87,65036100,26.87 Each data item is separated by a comma, and each line is separated by a carriage return. To make this data easier to consume by the data retrieval and business logic tiers, a web service consumes this HTTP service and exposes it as a structured DataTable. You ll see this in the next section.

The simplicity of using just one framework on the server instead of two might end up looking like a better option There s a subtler reason why WCF might not always be the best fit: the style of communication If you use WCF in a web application, the communication it supports will tend to involve the following steps: 1 Some code in the client (browser script, C# code, or Flash ActionScript) decides to send a message to the server 2 The server receives the message and runs some code that does whatever it needs to do to process the message 3 Once the code has finished, the server sends a message back to the client containing any data returned by the code (or if there is no data to return, just a message to say the work is complete).

OS X applications have application icons just as Windows applications do. The file format used on the Mac platform is icns. You can create icns files using several tools (search the Internet for examples). Apple supplies the Icon Composer, which is the recommended tool to use. After you create an icns file, you need to add it to your project file by using a line reading ICON = filename.icns, where filename.icns is your icon file.