Microsoft Enterprise Library 2nd Edition 开发者指南

需积分: 11 101 浏览量更新于2024-07-20 收藏 5.41MB PDF 举报

"Microsoft Enterprise Library 是一套由微软提供的企业级开发工具集，旨在帮助开发者更高效、更稳定地构建应用程序。此参考第二版由多位专家合著，包括Dominic Betts、Julián Domínguez、Alex Homer等人，并得到了S. Somasegar和Scott Guthrie的序言支持。文档提供了关于Microsoft Enterprise Library的详细开发指南，适用于内部参考使用。文档内容可能随时间变化，且不提供任何知识产权的使用权。" Microsoft Enterprise Library (MEL) 是微软推出的一个开源软件框架，它包含了一系列设计模式实现和最佳实践，主要面向.NET Framework的企业级应用开发。这个工具集旨在简化常见的软件开发任务，如数据访问、日志记录、异常处理、配置管理、验证以及缓存等。在第二版的开发者指南中，读者可以深入理解以下几个关键知识点： 1. **配置管理**：MEL提供了灵活的配置机制，使得开发者能够方便地在运行时更改应用程序的行为，而无需重新编译代码。这包括使用XML配置文件来定义和管理策略。 2. **数据访问**：数据访问应用块提供了用于执行数据库操作的抽象层，支持事务管理和错误处理。它可以帮助开发者更好地封装ADO.NET操作，减少重复代码。 3. **日志应用块**：MEL的日志功能允许开发者记录应用程序事件，提供了多种日志目标（如文件、控制台、事件查看器等）和不同级别的日志记录。这有助于调试和监控应用的运行状态。 4. **异常处理**：异常处理应用块提供了一种标准的方式来捕获、记录和处理异常，有助于提升应用的健壮性。它可以自定义错误处理策略，比如重试、通知或者记录错误信息。 5. **缓存管理**：缓存应用块允许开发者存储和检索对象，以提高性能。它可以与.NET Framework的内置缓存服务集成，或与其他缓存解决方案（如Memcached、Redis）配合使用。 6. **验证应用块**：MEL的验证功能提供了一套规则引擎，可以对对象属性进行验证，确保输入数据的正确性和完整性。验证结果可以与UI层很好地集成，提供用户友好的反馈。 7. **政策注入**：通过Policy Injection Application Block，开发者可以轻松地将行为（如事务处理、日志记录）添加到现有的类和方法中，遵循面向切面编程(AOP)的理念。 8. **Unity容器**：Unity是MEL中的一个依赖注入(DI)和控制反转(IoC)容器，帮助解耦组件之间的依赖关系，促进模块化和可测试性。 9. **最佳实践**：文档还包括了关于如何在实际项目中应用这些工具和模式的指导，以及如何根据项目需求进行定制。整体来说，Microsoft Enterprise Library第二版开发者指南是一份全面的参考资料，对于使用.NET Framework开发复杂、大型的企业级应用的团队来说，它是一个宝贵的资源。通过学习和应用其中的知识，开发者能够构建出更加健壮、易于维护和扩展的软件系统。

xvi

Lastly, don’t just read this book. It is meant to be a practical tutorial. And learning comes only through practice.

Experience Enterprise Library. Build something with it. Apply the concepts learnt in practice. And don’t forget

to share your experience.

In conclusion, I am excited about both the latest release of Enterprise Library and this book.

Scott Guthrie

Corporate Vice-President

Microsoft .NET Developer Platform

Redmond, Washington

May 18, 2010



Preface

A T G

When you casually pick up a book in your local bookstore or select one from the endless collection available on

your favorite Web site, you’re probably wondering what the book actually covers, what you’ll learn from it,

whether the content is likely to be interesting and useful, and—of course—whether it is actually any good. We’ll

have a go at answering the ﬁrst three of these questions here. The ﬁnal question is one only you can answer. Of

course, we would be pleased to hear your opinion through our community Web site at http://entlib.codeplex.com/.

What Does This Guide Cover?

As you can probably tell from the title, this guide concentrates on how you can get started with Enterprise

Library. It will help you learn how to use Enterprise Library in your applications to manage your crosscutting

concerns, simplify and accelerate your development cycle, and take advantage of proven practices. Enterprise

Library is a collection of prewritten code components that have been developed and ﬁne-tuned over many

years. You can use them out of the box, modify them as required, and distribute them with your applications.

You can even use Enterprise Library as a learning resource. It includes the source code that demonstrates

Microsoft .NET programming techniques and the use of common design patterns that can improve the design

and maintainability of your applications. By the way, if you are not familiar with the term crosscutting con-

cerns, don’t worry; we’ll explain it as we go along.

Enterprise Library is an extensive collection, with a great many moving parts. To the beginner, knowing how to

best take advantage of it is not completely intuitive. Therefore, in this guide we’ll help you to quickly under-

stand what Enterprise Library is, what it contains, how you can select and use just the speciﬁc features you

require, and how easy it is to get started using them. You will see how you can quickly and simply add Enterprise

Library to your applications, conﬁgure it to do exactly what you need, and then beneﬁt from the simple-to-use,

yet extremely compelling opportunities it provides for writing less code that achieves more.

The ﬁrst chapter of this guide discusses Enterprise Library in general, and provides details of the individual parts

so that you become familiar with the framework as a whole. The aim is for you to understand the basic prin-

ciples of each of the application blocks in Enterprise Library, and how you can choose exactly which blocks and

features you require. Chapter 1 also discusses the fundamentals of using the blocks, such as how to conﬁgure

them, how to instantiate the components, and how to use these components in your code.

The remaining seven chapters discuss in detail the application blocks that provide the basic crosscutting function-

ality such as data access, logging, and exception handling. These chapters explain the concepts that drove develop-

ment of the blocks, the kinds of tasks they can accomplish, and how they help you implement many well-known

design patterns. And, of course, they explain—by way of code extracts and sample programs—how you actually

use the blocks in your applications. After you’ve read each chapter, you should be familiar with the block and be

able to use it to perform a range of functions quickly and easily, in both new and existing applications.

This guide also includes a section called Tales from the Trenches, which contains case studies from the real

world, including experiences of developers using Enterprise Library for the very ﬁrst time. Additional case

studies get posted online as they become available (http://msdn.com/entlib), so make sure to check them out. If

you want to share your story with the developer community at large, send a draft to ourstory@microsoft.com

and we’ll work with you to get your story across.

Finally, the appendices present more detailed information on speciﬁc topics that you don’t need to know about

in detail to use Enterprise Library, but are useful as additional resources and will help you understand how

features such as dependency injection, interception, and encryption ﬁt into the Enterprise Library world.

All of the chapters include references to additional resources such as books, blog posts, and papers that will

provide additional detail if you want to explore some of the topics in greater depth. For your convenience, there

is a bibliography online that contains all the links so that these resources are just a click away: http://aka.ms/

el6biblio.

You can also download and work through the Hands-On Labs for Enterprise Library, which are available at

http://aka.ms/el6hols.

What This Guide Does Not Cover

The aim of this guide is to help you learn how to beneﬁt from the capabilities of Enterprise Library. It does not

describe the common design patterns in depth, or attempt to teach you about application architecture in

general. Instead, it concentrates on getting you up to speed quickly and with minimum fuss so you can use

Enterprise Library to manage your crosscutting concerns.

Enterprise Library is designed to be extensible. You can extend it simply by writing custom plug-in providers,

by modifying the core code of the library, or even by creating entirely new blocks. In this guide, we provide

pointers to how you can do this and explain the kinds of providers that you may be tempted to create, but it is

not a topic that we cover in depth. These topics are discussed more fully in the Enterprise Library Reference

Documentation, and in the many other resources available from our community Web site at http://www.codeplex.

com/entlib.

For more information about the Dependency Injection (DI) design pattern and associated patterns, see “Chap-

ter 2 – Dependency Injection” in the Unity Developer’s Guide.

How Will This Guide Help You?

If you build applications that run on the Microsoft .NET Framework, whether they are enterprise-level business

applications or even relatively modest Windows Forms, Windows Presentation Foundation (WPF), Windows

Communication Foundation (WCF), or ASP.NET applications, you can beneﬁt from Enterprise Library. This

guide helps you to quickly grasp what Enterprise Library can do for you, presents examples that show it in ac-

tion, and make it easier for you to start experimenting with Enterprise Library.

The sample applications are easy to assimilate, fully commented, and contain code that demonstrates all of the

main features. You can copy this code directly into your applications if you wish, or just use it as a guide when

you need to implement the common functionality it provides. The samples are console-based applications that

contain separate procedures for each function they demonstrate. You can download these samples from http://

go.microsoft.com/fwlink/p/?LinkID=304210.

Finally, what is perhaps the most important feature of this guide is that it will hopefully allay any fears you may

have about using other people’s code in your applications. By understanding how to select exactly the features

you need, and installing the minimum requirements to implement these features, you will see that what might

seem like a huge and complicated framework is actually a really useful set of individual components and features

from which you can pick and choose—a candy store for the architect and developer.

W’ W

The guide includes discussions and examples that relate to the use of Enterprise Library in a variety of scenari-

os and types of application. A panel of experts provides a commentary throughout the book, offering a range

of viewpoints from developers with various levels of skill, an architect, and an IT professional. The following

table lists the various experts who appear throughout the guide.

Markus is a software developer who is new to Enterprise Library. He is analytical, detail-

oriented, and methodical. He’s focused on the task at hand, which is building a great LOB

application. He knows that he’s the person who’s ultimately responsible for the code.

“I want to get started using Enterprise Library quickly, so I want it to be simple to

integrate with my code and easy to conﬁgure with plenty of sensible defaults.”

Beth is a developer who used Enterprise Library some time ago but abandoned it in her more

recent projects. She is interested in re-evaluating it but her primary concern is that it shouldn’t

be an all-or-nothing deal.

“I’m happy using libraries and frameworks but I don’t want to get tied into dependen-

cies that I don’t need. I want to be able to use just the components I need for the task

in hand.”

Jana is a software architect. She plans the overall structure of an application. Her perspective

is both practical and strategic. In other words, she considers not only what technical ap-

proaches are needed today, but also what direction a company needs to consider for the

future. Jana has worked on many projects that have used Enterprise Library as well as other

libraries. Jana is comfortable assembling a best-of-breed solution using multiple libraries and

frameworks.

“It’s not easy to balance the needs of the company, the users, the IT organization, the

developers, and the technical platforms we rely on while trying to ensure component

independence.”

Carlos is an experienced software developer and Enterprise Library expert. As a true profes-

sional, he is well aware of the common crosscutting concerns that developers face when

building line-of-business (LOB) applications for the enterprise. His team is used to rely on

Enterprise Library and they are happy to see continuity in Enterprise Library releases. Quality,

support, and ease of migration are his primary concerns.

“Our existing LOB applications use Enterprise Library for crosscutting concerns. This

provides a level of uniformity across all our systems that make them easier to support

and maintain. We want to be able to migrate our existing applications to the new ver-

sion with a minimum of effort.”

W D Y N  G S?

The prerequisites for using this guide are relatively simple. You’ll need to be relatively experienced in C#, and

understand general object-oriented programming techniques. The system requirements and prerequisites for

using Enterprise Library are:

•

Supported architectures: x86 and x64.

•

Operating system: Microsoft Windows 8.1, Microsoft Windows 7, Windows Server 2008 R2,

Windows Server 2012.

•

Microsoft .NET Framework 4.5 or 4.5.1.

•

For a rich development environment, the following are recommended:

•

Microsoft Visual Studio 2012 or 2013, Professional, Ultimate, or Express editions.

•

For the Data Access Application Block, the following is also required:

•

A database server running a database that is supported by a .NET Framework 4.5 data provider.

•

For the Logging Application Block, the following are also required:

•

If you are using the Message Queuing (MSMQ) Trace Listener to store log messages, you need the

Microsoft Message Queuing (MSMQ) components installed.

•

If you are using the Database Trace Listener to store log messages, you need access to a database

server.

•

If you are using the E-mail Trace Listener to store log messages, you need access to an SMTP server.

•

For the Semantic Logging Application Block, the following may be required:

•

If you are using the SQL Database Sink to store log messages, you need access to a SQL

Server database server.

•

If you are using the Windows Azure Sink to store log messages, you need access to a

Windows Azure storage account. You must also install the Windows Azure SDK Version 1.8.

You can use the NuGet package manager in Visual Studio to install the Enterprise Library assemblies that you

need in your projects.

Other than that, all you require is some spare time to sit and read, and to play with the example programs.

Hopefully you will ﬁnd the contents interesting (and perhaps even entertaining), as well as a useful source for

learning about Enterprise Library.

Poe is an IT professional who’s an expert in deploying and managing LOB applications. Poe

has a keen interest in practical solutions; after all, he’s the one who gets paged at 3:00 AM

when there’s a problem. Poe wants to be able to tweak application conﬁguration without

recompiling or even redeploying them in order to troubleshoot.

“I want a consistent approach to conﬁguration for all our applications both on-

premises and in the cloud and plenty of ﬂexibility for logging to make it easy to

manage and troubleshoot our applications.”

剩余244页未读，继续阅读

LBLyndon

粉丝: 0
资源: 23

Microsoft Enterprise Library 2nd Edition 开发者指南

Microsoft EnterPrise Library 5.0安装包

Enterprise Library V4.1 中文学习手册.PDF

[微软企业库] Microsoft Enterprise Library 6

.net6使用EnterpriseLibrary

.net core 配置Enterprise Library

Practices.EnterpriseLibrary.Logging的使用方式

microsoft.practices.enterpriselibrary.data连接字符串加密

uml系统分析与建模第二版pdf

community enterprise 版本区别

enterprise architect中文版下载

最新资源