4: Leveraging the NET Framework 685 in Visual C#.NET

Generator Code 39 Full ASCII in Visual C#.NET 4: Leveraging the NET Framework 685

Surfing Web Streams 686 Intercepting the request 686 Altering content sent to clients 689 Securing with ASPNET 690 Changing trusts 691 Fixing problems 692 Navigating with Site Maps 692 Adding a site map 692 Navigating a site with SiteMap 694 Managing Files 695 Baking Cookies 696 Coding for client-side storage 697 Wrangling cookies on the server 698 How ASPNET manages cookies for you 699 Tracing with TraceContext 699

Managing Files 704 Reviewing project types 704 Reviewing file types 706 Organizing files 708 Mastering Master Pages 709 Making a master page 709 Adding content 710 Testing Web Applications with Visual Studio 711

Deploying Your Masterpiece 713 Lots of options 713 Copying Web sites with Copy Web 714 Package/Publish 715

Understanding Web Services 719 Loosely coupled 721 Contract driven 722 Chunky versus chatty 724 Building Service-Oriented Applications 726 Providing XML Web Services 728 Building Three Sample Apps 728

Getting to Know SOAP 732 SOAP and standards 732 The WS-* standards 733 The impact to you 733 Big, fat, and slow 734 Making an ASMX Service 735 Creating a new service 735 Building the code for SHARP 739 Deploying 741 Consuming services in your applications 743

Getting to Know WCF 746 Creating a WCF Service 748 Breaking it down 748 Making a registration service 750 Configuring 752 Deploying 756 Consuming 757

Getting to Know ReST 759 Understanding the Guiding Principles of ReST 760 Diving into the details of ReST 761 Changing a WCF Service to Use ReST 762 Getting the WCF service 762 Exposing the ReST service 762 Returning data in different ways 763

Book VIII: New Features in C# 40 767

1: Programming Dynamically! 769

Shifting C# Toward Dynamic Typing 770 Programming Dynamically 772 Putting Dynamic to Use 774 Classic examples 774 Making static operations dynamic 775 Understanding what s happening under the covers 775 Running with the Dynamic Language Runtime 776 Dynamic Ruby 777 Dynamic C# 778

2: Improving Productivity with Named and Optional Parameters 781

Optional Parameters 782 Reference types 784 Output parameters 785 Named Parameters 786 Overload Resolution 787

Using Dynamic Import 790 Working without Primary Interop Assemblies 791 Skipping the Ref Statement 793

# 2010 All-in-One For Dummies represents a different way of looking at programming languages Rather than present the standard For Dummies format, which includes only 350 pages on quite a large subject, the book was expanded to include a broader scope and just a few pages were added So, although you find all the original C# For Dummies goodness in this book, you also find discussions about Visual Studio, Windows Presentation Foundation (WPF), service-oriented development, Web development, and a host of other topics This book is a one-stop shop for a C# developer The C# programming language is a powerful and, at some nine years old, relatively mature descendant of the earlier C, C++, and Java languages Programming with C# is lots of fun, as you re about to find out in this book Microsoft created C# as a major part of its NET initiative The company turned over the specifications for the C# language to the ECMA (pronounced ek-ma ) international standards committee in the summer of 2000 so that any company can, in theory, come up with its own version of C# written to run on any operating system, on any machine larger than a calculator When the first edition of this book was published, the Microsoft C# compiler was the only game in town, and its Visual Studio NET suite of tools was the only way to program C# (other than at the Windows command line) Since then, however, Visual Studio has undergone three major revisions the latest is Visual Studio 2010 And, at least two other players have entered the C# game You can now write and compile C# programs on Windows and a variety of Unix-based machines using implementations of NET and C#, such as Mono (www mono-projectcom), an open source software project sponsored by Novell Corporation Version 12 was released in November 2006 Though Mono lags Microsoft NET by half a version or so, it appears to be moving fast, having implemented basically all of NET 11 and much of NET 20, along with those versions of C# Both Mono and a less well developed competitor, Portable NET (www dotgnuorg/pnethtm), claim to run C# programs on Windows and a variety of Unix flavors, including Linux and the Apple Macintosh operating system At the time of this writing, Portable NET reaches the greater number of flavors, whereas Mono boasts a more complete NET implementation So choosing between them can be complicated, depending on your project, your platform, and your goals (Books about programming for these platforms are becoming available already Check online booksellers)

What s New in C# 40

Open source software is written by collaborating groups of volunteer programmers and is usually free to the world A description of how to make C# and other NET languages portable to other operating systems is far beyond the scope of this book But you can expect that within a few years, the C# Windows programs you discover how to write in this book will run on all sorts of hardware under all sorts of operating systems matching the claim of Sun Microsystems Java language to run on any machine That s undoubtedly a good thing, even for Microsoft The road to that point is still under construction, so it s no doubt riddled with potholes and obstacles to true universal portability for C# But it s no longer just Microsoft s road For the moment, however, Microsoft Visual Studio has the most mature versions of C# and NET and the most feature-filled toolset for programming with them Note: Though three authors contributed to this book, saying I rather than we throughout the main text seemed more economical, so that s what we (or I) do throughout

What s New in C# 40

Although much of C# 40 is still virtually the same as the previous version, this new version adds some exciting new features, most of which revolve around COM Interop, to assist with Office development The big new additions that this book covers include these topics: Dynamic types: Functional programming is all the rage these days, with the cool kids programming in Ruby and Haskell Functional programming certainly has some benefits that have a place in the more tightly woven world of C#, and dynamic typing is one of them As supported in C++ and Visual Basic, dynamic types allow runtime declaration when you don t know the type of a variable and then have the compiler figure it out Properly used, dynamic typing is quite powerful; poorly used, it s quite dangerous Named and optional parameters: In C# 30, you had to provide a value for every parameter in a method call In C# 40 again, to optimize interactions with COM you can mark parameters as optional and accept outside objects that have optional parameters Variance in generics: Although objects in previous versions of C# are variant, generic collections of objects are invariant This statement means that although the compiler accepts an apple when you re asked for a fruit, it doesn t accept a basket of apples when you re asked for a basket of fruit This issue is fixed in C# 40