WCFPDA开发资源WCFGuidanceForMobileDevelopers资源-CSDN文库

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**WCF PDA开发资源：WCF Guidance For Mobile Developers** Windows Communication Foundation (WCF) 是微软推出的一种统一的编程模型，用于构建面向服务的应用程序。它允许开发者在各种平台之间进行安全、可靠、可扩展的通信。对于PDA（个人数字助理）和Windows CE设备的开发，WCF提供了一种强大的工具，使移动应用程序能够与其他系统无缝集成。《WCF Guidance For Mobile Developers》是针对移动开发者的WCF技术指南，尤其适用于那些在Windows Mobile和Windows CE平台上工作的开发者。这本书籍或文档集详细介绍了如何在资源受限的环境中有效地利用WCF，以实现高效、灵活的移动应用开发。文档部分可能涵盖了以下几个关键知识点： 1. **WCF基础知识**：介绍WCF的核心概念，如服务合同、绑定、终结点、数据协定和服务行为等，以及它们在移动环境中的应用。 2. **移动设备的适应性**：讨论如何调整WCF配置以适应PDA和Windows CE设备的限制，例如内存管理、电池寿命和网络连接的不稳定。 3. **安全性**：阐述在移动环境中确保通信安全的方法，如身份验证、授权、加密和消息完整性。 4. **性能优化**：提供指导，如何最小化网络开销，使用流式传输、数据压缩和减少消息大小等技巧来提高性能。 5. **部署和配置**：介绍如何在移动设备上部署WCF服务和客户端，以及如何配置设备上的IIS微型服务器。 6. **示例代码**：提供的代码示例可能涵盖了从简单的服务调用到复杂的企业级集成的各种场景，帮助开发者理解和应用WCF技术。 7. **故障排查**：提供解决WCF在移动设备上可能出现的问题的策略和技巧，帮助开发者诊断和修复错误。 8. **最佳实践**：总结适用于移动开发的最佳实践，以确保代码的可维护性和可扩展性。《WCF Guidance For Mobile Developers》不仅是一份技术文档，还包含源代码示例，这使得学习过程更加直观和实用。通过阅读和研究这些资料，开发者可以深入理解如何在PDA和Windows CE设备上利用WCF构建高效、可靠的移动解决方案。这个资源对于任何希望在Windows CE或Windows Mobile设备上利用WCF开发服务和应用的开发者来说都是宝贵的财富。它不仅提供了理论知识，还包含了实际操作的指导，有助于开发者快速掌握WCF在移动环境下的应用技巧。

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WCF Mobile.zip （2个子文件）

WCFGuidanceForMobile_CSharp.zip 423KB

WCFGuidanceForMobileDevelopers.pdf 1.53MB

WCF Guidance for Mobile Developers

Michele Leroux Bustamante and Nickolas Landry, May 2009

wcfguidanceformobile.codeplex.com Page 1

Contents

The State of Windows Mobile Today ............................................................................................................ 4

Windows Mobile Devices .......................................................................................................................... 5

Pocket PCs (Windows Mobile 6 Professional/Classic) .......................................................................... 5

Smartphones ......................................................................................................................................... 6

.NET Compact Framework ........................................................................................................................ 6

Remote Communications with Mobile Devices ........................................................................................ 7

WCF for the Mobile Developer ..................................................................................................................... 9

Setting Up Your Mobile Development Environment .................................................................................. 11

Visual Studio 2008 Professional (and higher) ......................................................................................... 11

Windows Mobile 6 Professional and Standard Software Development Kits Refresh ............................ 12

Microsoft Windows Mobile Device Center 6.1 for Windows Vista ........................................................ 12

Power Toys for .NET Compact Framework 3.5 ....................................................................................... 14

Final Steps ............................................................................................................................................... 14

Getting Started: Your First Mobile + WCF Application ............................................................................... 14

Creating and Hosting the WCF Service ................................................................................................... 15

Creating a Simple Mobile Application ..................................................................................................... 17

Proxy Generation for Mobile Applications ............................................................................................. 19

Testing the Solution ................................................................................................................................ 21

Contract Design ........................................................................................................................................... 22

Service Contracts .................................................................................................................................... 23

Streaming ............................................................................................................................................ 24

Sessions ............................................................................................................................................... 25

Duplex ................................................................................................................................................. 25

Transactions ........................................................................................................................................ 25

Complex Types and Serialization ............................................................................................................ 26

Serialization Architecture .................................................................................................................... 26

Complex Types and Wire Compatibility .............................................................................................. 27

Fault Contracts ........................................................................................................................................ 32

Message Contracts .................................................................................................................................. 32

WCF Guidance for Mobile Developers

Michele Leroux Bustamante and Nickolas Landry, May 2009

wcfguidanceformobile.codeplex.com Page 2

Proxy Generation ........................................................................................................................................ 34

Working with NetCFSvcUtil ..................................................................................................................... 35

Proxy Architecture .................................................................................................................................. 36

Bindings ....................................................................................................................................................... 38

Supported Binding Features ................................................................................................................... 38

Client Binding Configurations ................................................................................................................. 40

Debugging and Host Name Configuration .................................................................................................. 41

Modifying the Hosts File ......................................................................................................................... 41

Configuring IIS 7 Bindings ....................................................................................................................... 42

Exception Handling ..................................................................................................................................... 45

Exceptions and Faults ............................................................................................................................. 45

Declared Faults ....................................................................................................................................... 46

Fault Exceptions and NetCFSvcUtil ......................................................................................................... 47

Fault Processing Improvements to CFClientBase ................................................................................... 48

Changes to CFClientBase ..................................................................................................................... 49

Working with Message Headers ................................................................................................................. 53

Message Contracts .................................................................................................................................. 54

NetCFSvcUtil and Custom Headers ......................................................................................................... 55

Enhancing CFClientBase to Support Headers ......................................................................................... 57

Communicating with REST-Based Services ................................................................................................. 61

Implementing a REST-Based Service ....................................................................................................... 61

Using HttpWebRequest .......................................................................................................................... 62

Securing Mobile + WCF Communications ................................................................................................... 63

SSL Transfer Security ............................................................................................................................... 63

Basic Authentication ............................................................................................................................... 64

Digest Authentication ............................................................................................................................. 66

Securing REST-Based Services ................................................................................................................. 67

Mutual Certificate Authentication .......................................................................................................... 67

Installing Certificates to a Mobile Device ............................................................................................... 70

Deployment Considerations ....................................................................................................................... 71

Acknowledgements ..................................................................................................................................... 72

WCF Guidance for Mobile Developers

Michele Leroux Bustamante and Nickolas Landry, May 2009

wcfguidanceformobile.codeplex.com Page 3

Mobile devices have become a staple of everyday life, not only for professional knowledge workers but

also for average consumers and end-users who have grown accustomed to a connected lifestyle. Mobile

devices are routinely used to make phone calls, send and receive emails, exchange text messages and

manage busy schedules with calendars and reminders. Most devices can perform much more than

typical “electronic organizer” and phone features. They literally are small computers that can fit in a

pocket, lab coat or purse. Just like any computer, to get the most value out of devices, you need

additional software.

When it comes to writing mobile software, there are two main types of applications you can build to run

on devices: standalone applications, and connected smart clients. Standalone applications have to deal

with multiple constraints introduced by the device form factor - such as limited screen real estate, less

memory, CPU power and available storage, limited input methods such as tactile screens and hardware

keys on the device, and dependency on battery life. Smart clients on the other hand have to deal with

the same constraints as standalone mobile applications with the addition of concerns related to

communications with remote server resources such as sporadic connectivity, slower connection speeds,

high latency networks, wireless security threats and much more.

The ability to reach application servers and backend systems and databases is what finally enabled

mobile devices as full class enterprise citizens. Enterprise applications have long been accessible to

office users and knowledge workers in various ways. Whether they are deployed locally as rich clients or

accessed centrally as Web clients running within a browser, enterprise applications connect people,

systems, processes and data in order to achieve enterprise agility. This is done by relying on systems

that enhance productivity, lower operational costs, and enable new ways to work with data, resulting in

a competitive advantage.

Great technological advances in the field of mobility have allowed us to reach even farther out, beyond

the physical boundaries of the enterprise. Faster wireless networks, broader coverage, more powerful

devices, standardized positioning and location-based services, different form factors and state of the art

development tools have all contributed to the mobile revolution currently in progress.

Most of the users that have been long forgotten by the world of information technology are now able to

participate in automated business processes once again. Both internal and external mobile and field

workers can access corporate data from the road, alter it or collect new data, and submit it back to the

central office.

Spurred by technologies like the Windows Mobile platform and the Microsoft .NET Compact Framework

which brings managed code to mobile devices, a new breed of mobile smart client applications is

emerging and changing the way we think about software development. These new smart clients are

based on best practices learned by merging rich clients and Web development, bringing the best of both

worlds to the realm of mobile devices.

WCF Guidance for Mobile Developers

Michele Leroux Bustamante and Nickolas Landry, May 2009

wcfguidanceformobile.codeplex.com Page 4

Windows Mobile 6.1 is the latest operating platform from Microsoft for running mobile applications – be

they standalone or connected. Mobile smart clients built for Windows Mobile using the .NET Compact

Framework can use a number of different technologies for remote communications including text

messaging, email-based transports, sockets, and web services. Today, Windows Communication

Foundation (WCF) is the preferred technology for building connected applications – a subset of which is

available in the .NET Compact Framework 3.5. The goal of this whitepaper is to help developers build

mobile smart clients for Windows Mobile 6 using WCF to communicate with remote server resources.

Specifically, this paper will explain how to design and implement WCF services so that they can be

consumed by .NET Compact Framework applications running on Windows Mobile devices and show you

how to work with the subset of WCF on mobile devices to consume those services.

For those new to mobile development we will provide an overview of the platform tools available along

with instructions to set up your development environment as it relates to the scenarios we will be

describing in this whitepaper. We’ll also walk you through creating and hosting a simple WCF service

and generating a proxy to consume that service from a mobile device – so if you are new to WCF you

will be able to follow along. We will then discuss specific considerations related to WCF and mobile

development including contract design and serialization, binding configuration for endpoints, hosting

options, proxy generation, exception handling, and security. In addition, we will discuss how to consume

REST-based WCF services from your mobile applications.

The State of Windows Mobile Today

Mobile devices, just like any desktop or server computer, require an operating system to run. Mobile

.NET applications run as managed code under the care of the .NET Compact Framework, which in turn

runs on top of a specific embedded operating system. Just like the .NET Framework was designed and

built to run on top of various flavors of Windows, like Windows Vista, Windows 7 or Windows Server

2008 - the .NET Compact Framework was designed and built to run on top of mobile and embedded

device-specific versions of Windows: Windows CE.

Microsoft Windows CE is a scaled-down and modular version of the Windows NT core operating system

targeted at a wide range of innovative, small-footprint devices including consumer electronics,

gateways, industrial controllers, mobile handheld devices, Internet Protocol (IP) set-top boxes, voice

over Internet protocol (VoIP) phones and thin clients. Windows CE features a multithreaded 32-bit

kernel and an open architecture optimized for real-time, and has the power to drive serious applications

in any kind of device. With its scalable model, Windows CE can scale up to power feature-rich devices

and appliances, and scale down to less than 1 MB to provide basic but powerful system services in very

compact form factors.

Windows CE’s modularity also allows device manufacturers to decide which components of the OS they

want to include. The device manufactures can thus streamline their respective devices by excluding

unnecessary modules and libraries that would add little value for the end user.

WCF Guidance for Mobile Developers

Michele Leroux Bustamante and Nickolas Landry, May 2009

wcfguidanceformobile.codeplex.com Page 5

Because of the modular nature of Windows CE, it has become difficult for mobile application developers

to write generic solutions. Each mobile device might have a slightly different variant of Windows CE,

and the developer could never know in advance whether an OS component existed in the final device or

not. This inconsistency and uncertainty greatly limited deployment scenarios because applications had

to be device-specific.

Microsoft solved that problem by introducing Windows CE-based specifications targeted at standard

consumer devices and phones. A specification defines two sets of components:

 The core components necessary for the OS

 A set of shell-extensions which provide a uniform look and feel and uniform data entry mechanism

for each group of device form factors.

In other words, each device must support a common, minimum set of components. Additional

components are grouped into specific extensions. In order to unify the Windows CE versions to be used

on generic consumer-grade Pocket PCs and Smartphones, Microsoft created Windows Mobile. Windows

mobile is therefore a platform that meets a standard set of specifications for Windows CE.

Windows Mobile 6 is powered by Windows CE 5.0 and includes a number of mobile productivity

features including an SDK with managed API's for working with Outlook Mobile and Telephony, a

lightweight version of Office called Office Mobile (including Word Mobile, Excel Mobile and PowerPoint

Mobile) and Media Player Mobile. Windows Mobile 6.0 added many security enhancement such as

storage card security and better support for certificates, and a number of other productivity and

networking features are also included to provide control for device specific capabilities, such as Caller

Photo ID, GPS and Bluetooth. Windows Mobile 6.1 added a more streamlined Today screen and support

for Microsoft App Center Mobile Device Manager, and the new version 6.5 introduces new user

interface options as well as updated productivity applications.

Windows Mobile Devices

Windows Mobile devices are primarily consumer-level devices that fall under one of two categories:

Pocket PCs and Smartphones.

Pocket PCs (Windows Mobile 6 Professional/Classic)

Pocket PCs are versatile PDAs (Personal Digital/Data Assistants) that act like miniaturized computers in

terms of running applications on top of a mobile operating system, but they also provide the user with

many key characteristics to facilitate mobile usage in the field. These characteristics include stylus-based

input on a tactile screen, handwriting recognition, and a standard set of device keys (i.e. buttons) for

quick and easy access while standing. Many Pocket PC devices today feature a full QWERTY keyboard,

either at the base of the device under the screen, or on a panel at the bottom or on the side of the

device.

As wireless networks evolved, Pocket PC devices started featuring standard wireless radios for access to

Personal Area Networks (PAN, like Bluetooth-based networks), Wireless LANs (WLAN, like Wi-Fi-based

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