使用最新框架ASP.NET Core MVC2构建云应用

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"Apress Pro ASP.Net Core MVC2 7th Edition" 本书《Pro ASP.NET Core MVC 2》是第七版，作者是Adam Freeman，由Apress出版，专注于使用微软最新的框架ASP.NET Core MVC 2来开发云就绪的Web应用程序。这本书面向的是希望提升ASP.NET Core MVC技能的专业开发者。 ASP.NET Core是微软推出的一种跨平台的开源框架，用于构建现代化的、高性能的Web应用程序。它是对传统ASP.NET的重大改进，支持Windows、Linux和macOS等操作系统。ASP.NET Core MVC是该框架的一部分，它提供了一种模型-视图-控制器（MVC）架构，使开发者能够以更灵活和可测试的方式构建Web应用。在本书中，读者将学习如何利用C# 7.5的特性来编写ASP.NET Core MVC 2应用。C# 7.5是C#语言的一个重要版本，包含了许多新特性和改进，如本地异步流、模式匹配增强、out变量模板等，这些都极大地提高了代码的效率和可读性。作者Adam Freeman深入浅出地介绍了如何设置开发环境，创建和配置项目，以及设计和实现控制器、视图和模型。他还涵盖了依赖注入、身份验证与授权、测试、部署以及性能优化等关键话题。此外，书中可能还会涉及使用Entity Framework Core进行数据库交互，这是一个轻量级且强大的ORM（对象关系映射）工具，使得开发者可以更容易地处理数据存储和检索。书中可能还包括了使用Kestrel服务器、中间件、Blazor（一种用于构建客户端Web应用的ASP.NET Core组件）等内容，以及如何利用Visual Studio或Visual Studio Code等开发工具进行开发。此外，对于云服务，如Azure的集成和使用也可能有详尽的解释，以帮助开发者构建可扩展和可靠的云原生应用。通过阅读本书，开发者不仅可以掌握ASP.NET Core MVC 2的基本概念和技术，还能了解到最佳实践和实际开发中的问题解决策略，从而提升自己的专业技能，并能适应快速变化的Web开发环境。无论你是ASP.NET的新手还是有经验的开发者，这本书都能提供宝贵的知识和实战指导。

■ Contents

xvi

■Chapter 15: URL Routing�� 429

Preparing the Example Project ..................................................................................... 430

Creating the Model Class ....................................................................................................................431

Creating the Example Controllers ....................................................................................................... 431

Creating the View ............................................................................................................................... 432

Introducing URL Patterns ............................................................................................. 434

Creating and Registering a Simple Route .................................................................... 435

Deﬁning Default Values ................................................................................................ 437

Deﬁning Inline Default Values ............................................................................................................. 438

Using Static URL Segments .......................................................................................... 440

Deﬁning Custom Segment Variables ............................................................................ 445

Using Custom Variables as Action Method Parameters ...................................................................... 448

Deﬁning Optional URL Segments ........................................................................................................ 449

Deﬁning Variable-Length Routes ........................................................................................................ 451

Constraining Routes ..................................................................................................... 453

Constraining a Route Using a Regular Expression ..............................................................................457

Using Type and Value Constraints ....................................................................................................... 458

Combining Constraints .......................................................................................................................459

Deﬁning a Custom Constraint .............................................................................................................461

Using Attribute Routing ................................................................................................ 463

Preparing for Attribute Routing ........................................................................................................... 463

Applying Attribute Routing .................................................................................................................. 464

Applying Route Constraints ................................................................................................................467

Summary ...................................................................................................................... 468

■Chapter 16: Advanced Routing Features �� 469

Preparing the Example Project ..................................................................................... 470

Generating Outgoing URLs in Views ............................................................................. 471

Generating Outgoing Links .................................................................................................................471

Generating URLs (and Not Links) ........................................................................................................ 483

■ Contents

xvii

Customizing the Routing System ................................................................................. 484

Changing the Routing System Conﬁguration ......................................................................................484

Creating a Custom Route Class ..........................................................................................................486

Working with Areas ...................................................................................................... 497

Creating an Area ................................................................................................................................. 497

Creating an Area Route ....................................................................................................................... 498

Populating an Area ............................................................................................................................. 499

Generating Links to Actions in Areas .................................................................................................. 502

URL Schema Best Practices ......................................................................................... 503

Making Your URLs Clean and Human-Friendly ................................................................................... 503

GET and POST: Picking the Right One ................................................................................................. 504

Summary ...................................................................................................................... 505

■Chapter 17: Controllers and Actions �� 507

Preparing the Example Project ..................................................................................... 508

Preparing the Views ............................................................................................................................ 509

Understanding Controllers ............................................................................................ 511

Creating Controllers ..................................................................................................... 512

Creating POCO Controllers ..................................................................................................................512

Using the Controller Base Class ......................................................................................................... 514

Receiving Context Data ................................................................................................ 516

Getting Data from Context Objects .....................................................................................................516

Using Action Method Parameters ....................................................................................................... 520

Producing a Response .................................................................................................. 522

Producing a Response Using the Context Object ................................................................................522

Understanding Action Results ............................................................................................................. 524

Producing an HTML Response ............................................................................................................ 526

Performing Redirections ..................................................................................................................... 535

Returning Different Types of Content .................................................................................................. 543

Responding with the Contents of Files ............................................................................................... 545

■ Contents

xviii

Returning Errors and HTTP Codes ...................................................................................................... 547

Understanding the Other Action Result Classes ................................................................................. 549

Summary ...................................................................................................................... 550

■Chapter 18: Dependency Injection �� 551

Preparing the Example Project ..................................................................................... 552

Creating the Model and Repository .................................................................................................... 553

Creating the Controller and View ........................................................................................................ 554

Creating the Unit Test Project ............................................................................................................. 556

Creating Loosely Coupled Components ........................................................................ 556

Examining Closely Coupled Components............................................................................................ 557

Introducing ASP.NET Dependency Injection .................................................................. 564

Preparing for Dependency Injection ...................................................................................................564

Conﬁguring the Service Provider ........................................................................................................ 565

Unit Testing a Controller with a Dependency ...................................................................................... 567

Using Dependency Chains ..................................................................................................................568

Using Dependency Injection for Concrete Types ................................................................................. 570

Understanding Service Life Cycles ............................................................................... 573

Using the Transient Life Cycle............................................................................................................. 574

Using the Scoped Life Cycle ............................................................................................................... 578

Using the Singleton Life Cycle ............................................................................................................ 580

Using Action Injection ................................................................................................... 581

Using the Property Injection Attributes ......................................................................... 582

Manually Requesting an Implementation Object .......................................................... 582

Summary ...................................................................................................................... 583

■Chapter 19: Filters �� 585

Preparing the Example Project ..................................................................................... 586

Enabling SSL ....................................................................................................................................... 587

Creating the Controller and View ........................................................................................................ 587

Using Filters ................................................................................................................. 589

■ Contents

xix

Understanding Filters ................................................................................................... 592

Getting Context Data ...........................................................................................................................593

Using Authorization Filters ........................................................................................... 594

Creating an Authorization Filter .......................................................................................................... 594

Using Action Filters ...................................................................................................... 597

Creating an Action Filter ..................................................................................................................... 598

Creating an Asynchronous Action Filter .............................................................................................. 600

Using Result Filters ...................................................................................................... 601

Creating a Result Filter ....................................................................................................................... 602

Creating an Asynchronous Result Filter .............................................................................................. 604

Creating a Hybrid Action/Result Filter ................................................................................................. 605

Using Exception Filters ................................................................................................. 607

Creating an Exception Filter ...............................................................................................................608

Using Dependency Injection for Filters ......................................................................... 610

Resolving Filter Dependencies ........................................................................................................... 610

Managing Filter Life Cycles ................................................................................................................ 615

Creating Global Filters .................................................................................................. 618

Understanding and Changing Filter Order .................................................................... 620

Changing Filter Order .........................................................................................................................622

Summary ...................................................................................................................... 623

■Chapter 20: API Controllers �� 625

Preparing the Example Project ..................................................................................... 626

Creating the Model and Repository .................................................................................................... 626

Creating the Controller and Views ...................................................................................................... 628

Understanding the Role of RESTful Controllers ............................................................ 632

Understanding the Speed Problem ..................................................................................................... 632

Understanding the Efﬁciency Problem ...............................................................................................632

Understanding the Openness Problem ............................................................................................... 633

■ Contents

Introducing REST and API Controllers .......................................................................... 633

Creating an API Controller ................................................................................................................... 634

Testing an API Controller .....................................................................................................................639

Using the API Controller in the Browser .............................................................................................. 643

Understanding Content Formatting .............................................................................. 645

Understanding the Default Content Policy .......................................................................................... 646

Understanding Content Negotiation .................................................................................................... 647

Specifying an Action Data Format ...................................................................................................... 650

Getting the Data Format from the Route or Query String ................................................................... 651

Enabling Full Content Negotiation ...................................................................................................... 653

Receiving Different Data Formats ....................................................................................................... 654

Summary ...................................................................................................................... 655

■Chapter 21: Views �� 657

Preparing the Example Project ..................................................................................... 658

Creating a Custom View Engine ................................................................................... 659

Creating a Custom IView ....................................................................................................................661

Creating an IViewEngine Implementation ...........................................................................................662

Registering a Custom View Engine ..................................................................................................... 663

Testing the View Engine ......................................................................................................................664

Working with the Razor Engine .................................................................................... 666

Preparing the Example Project ...........................................................................................................667

Demystifying Razor Views .................................................................................................................. 669

Adding Dynamic Content to a Razor View .................................................................... 673

Using Layout Sections ........................................................................................................................ 673

Using Partial Views ............................................................................................................................. 679

Adding JSON Content to Views ........................................................................................................... 682

Conﬁguring Razor ......................................................................................................... 684

Understanding View Location Expanders ........................................................................................... 685

Summary ...................................................................................................................... 690

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