ASP.NET Core Recipes 2nd ed.

442 Pages·2017·5.376 MB·english

by  John Ciliberti

ASP.NET Core Recipes
A Problem-Solution Approach
Second Edition
John Ciliberti
ASP.NET Core Recipes: A Problem-Solution Approach
John Ciliberti
Sparta, New Jersey, USA
ISBN-13 (pbk): 978-1-4842-0428-3 ISBN-13 (electronic): 978-1-4842-0427-6
DOI 10.1007/978-1-4842-0427-6
Library of Congress Control Number: 2017953377
Copyright © 2017 by John Ciliberti
Any source code or other supplementary material referenced by the author in this book is available to
readers on GitHub via the book’s product page, located at www.apress.com/9781484204283. For more
detailed information, please visit www.apress.com/source-code.
Contents at a Glance
Introduction� ��������������������������������������������������������������������������������������������������������xxvii
■ Chapter 1: ASP�NET Core MVC Fundamentals ��������������������������������������������������������1
■ Chapter 2: Getting Started with ASP�NET Core MVC ���������������������������������������������43
■ Chapter 3: MVC Razor Syntax and HTML Helpers ������������������������������������������������67
■ Chapter 4: Using Tag Helpers ����������������������������������������������������������������������������101
■ Chapter 5: Getting the Most from the New Features in ASP�NET Core MVC �������139
■ Chapter 6: Solution Design Using ASP�NET Core MVC ����������������������������������������171
■ Chapter 7: Test-Driven Development with ASP�NET Core MVC ���������������������������221
■ Chapter 8: Moving from Web Forms to ASP�NET Core MVC ��������������������������������251
■ Chapter 9: Data Validation Using ASP�NET Core MVC �����������������������������������������295
■ Chapter 10: Securing Your ASP�NET Core MVC Application �������������������������������335
■ Chapter 11: Creating Modern User Experiences Using React�js and
ASP�NET Core �����������������������������������������������������������������������������������������������������361
■ Appendix ������������������������������������������������������������������������������������������������������������411
Index ���������������������������������������������������������������������������������������������������������������������425
Contents
Introduction� ��������������������������������������������������������������������������������������������������������xxvii
■ Chapter 1: ASP�NET Core MVC Fundamentals ��������������������������������������������������������1
1-1. Understanding the Microsoft Web Development Ecosystem ....................................1
Problem ..................................................................................................................................................1
Solution...................................................................................................................................................2
How It Works ...........................................................................................................................................2
1-2. Understanding the MVC Pattern ..............................................................................11
Problem ................................................................................................................................................11
Solution.................................................................................................................................................11
How It Works .........................................................................................................................................12
1-3. Understanding the Differences Between MVC, MVVM, and MVP ............................14
Problem ................................................................................................................................................14
Solution.................................................................................................................................................15
How It Works .........................................................................................................................................15
1-4. Discovering the Features of ASP.NET Core MVC .....................................................17
Problem ................................................................................................................................................17
Solution.................................................................................................................................................17
How It Works .........................................................................................................................................17
1-5. Understanding the Architecture of ASP.NET Core MVC ...........................................22
Problem ................................................................................................................................................22
Solution.................................................................................................................................................22
How It Works .........................................................................................................................................23
1-6. Understanding Models in ASP.NET Core MVC ..........................................................30
Problem ................................................................................................................................................30
Solution.................................................................................................................................................30
How It Works .........................................................................................................................................31
1-7. Understanding Controllers and Actions in ASP.NET Core MVC ................................33
Problem ................................................................................................................................................33
Solution.................................................................................................................................................33
How It Works .........................................................................................................................................34
1-8. Understanding Page Routing in ASP.NET Core MVC ................................................37
Problem ................................................................................................................................................37
Solution.................................................................................................................................................37
How It Works .........................................................................................................................................37
1-9. Understanding View Engines in ASP.NET Core MVC ................................................39
Problem ................................................................................................................................................39
Solution.................................................................................................................................................40
How It Works .........................................................................................................................................40
■ Chapter 2: Getting Started with ASP�NET Core MVC ���������������������������������������������43
2-1. Setting Up Your Development Environment ............................................................43
Problem ................................................................................................................................................43
Solution.................................................................................................................................................43
How It Works .........................................................................................................................................44
2-2. Determining Which Operating System to Use for Your Development Machine .......47
Problem ................................................................................................................................................47
Solution.................................................................................................................................................48
How It Works .........................................................................................................................................48
2-3. Creating a New ASP.NET Core MVC Application Using Visual Studio 2017 ..............50
Problem ................................................................................................................................................50
Solution.................................................................................................................................................50
How It Works .........................................................................................................................................51
2-4. Creating a New ASP.NET Core MVC Application Using dotnet.exe ..........................51
Problem ................................................................................................................................................51
Solution.................................................................................................................................................51
How It Works .........................................................................................................................................51
2-5. Understanding the Structure of an ASP.NET Core MVC Project ...............................53
Problem ................................................................................................................................................53
Solution.................................................................................................................................................53
How It Works .........................................................................................................................................53
2-6. Using Visual Studio’s Debugging Windows to Debug an ASP.NET Core
MVC Application ......................................................................................................57
Problem ................................................................................................................................................57
Solution.................................................................................................................................................57
How It Works .........................................................................................................................................58
2-7. Setting a Conditional Breakpoint in an ASP.NET Core MVC Controller ....................60
Problem ................................................................................................................................................60
Solution.................................................................................................................................................60
How It Works .........................................................................................................................................60
2-8. Testing Your ASP.NET Core MVC Application Across Many Browsers
at the Same Time ....................................................................................................62
Problem ................................................................................................................................................62
Solution.................................................................................................................................................63
How It Works .........................................................................................................................................63
2-9. Editing Your Views and Layouts from Inside Internet Explorer................................64
Problem ................................................................................................................................................64
Solution.................................................................................................................................................64
How It Works .........................................................................................................................................64
■ Chapter 3: MVC Razor Syntax and HTML Helpers ������������������������������������������������67
3-1. Understanding Razor Syntax ...................................................................................67
Problem ................................................................................................................................................67
Solution.................................................................................................................................................67
How It Works .........................................................................................................................................68
3-2. Creating an Action Link ...........................................................................................75
Problem ................................................................................................................................................75
Solution.................................................................................................................................................75
How It Works .........................................................................................................................................76
3-3. Creating an Action Link to Another Controller .........................................................79
Problem ................................................................................................................................................79
Solution.................................................................................................................................................79
How It Works .........................................................................................................................................80
3-4. Creating an Action Link to Another Area .................................................................80
Problem ................................................................................................................................................80
Solution.................................................................................................................................................80
How It Works .........................................................................................................................................81
3-5. Creating an Action Link with Custom HTML Attributes ...........................................81
Problem ................................................................................................................................................81
Solution.................................................................................................................................................82
How It Works .........................................................................................................................................82
3-6. Creating an Action Link That Uses HTTPS ...............................................................82
Problem ................................................................................................................................................82
Solution.................................................................................................................................................83
How It Works .........................................................................................................................................83
3-7. Creating Your Own Action Link for Creating HTTPS Links .......................................84
Problem ................................................................................................................................................84
Solution.................................................................................................................................................84
How It Works .........................................................................................................................................85
3-8. Creating an Action Link with an Anchor Target .......................................................86
Problem ................................................................................................................................................86
Solution.................................................................................................................................................86
How It Works .........................................................................................................................................86
3-9. Creating an Image Link ...........................................................................................90
Problem ................................................................................................................................................90
Solution.................................................................................................................................................90
How It Works .........................................................................................................................................90
3-10. Creating an Image Link Using a Bootstrap Glyphicon ...........................................90
Problem ................................................................................................................................................90
Solution.................................................................................................................................................90
How It Works .........................................................................................................................................91
3-11. Using HTML Helpers to Create HTML Form Elements ...........................................91
Problem ................................................................................................................................................91
Solution.................................................................................................................................................92
How It Works .........................................................................................................................................92
3-12. Using Strongly Typed HTML Helpers .....................................................................95
Problem ................................................................................................................................................95
Solution.................................................................................................................................................95
How It Works .........................................................................................................................................96
3-13. Using Templated HTML Helpers ............................................................................97
Problem ................................................................................................................................................97
Solution.................................................................................................................................................97
How It Works .........................................................................................................................................98
3-14. Creating an Inline Function in a Razor View .........................................................99
Problem ................................................................................................................................................99
Solution.................................................................................................................................................99
How It Works .......................................................................................................................................100
■ Chapter 4: Using Tag Helpers ����������������������������������������������������������������������������101
4-1. Understanding Tag Helpers ...................................................................................101
Problem ..............................................................................................................................................101
Solution...............................................................................................................................................101
How It Works .......................................................................................................................................103
4-2. Creating Hyperlinks with the Anchor Tag Helper ...................................................104
Problem ..............................................................................................................................................104
Solution...............................................................................................................................................104
How It Works .......................................................................................................................................105
4-3. Building a Form Using the Form, Label, and Input Tag Helpers ............................107
Problem ..............................................................................................................................................107
Solution...............................................................................................................................................107
How It Works .......................................................................................................................................107
4-4. Data Binding a Nullable bool to an Option Tag Helper ..........................................112
Problem ..............................................................................................................................................112
Solution...............................................................................................................................................112
How It Works .......................................................................................................................................112
4-5. Creating a Drop-Down List with the Select Tag Helper .........................................114
Problem ..............................................................................................................................................114
Solution...............................................................................................................................................114
How It Works .......................................................................................................................................115
4-6. Validating Input with Tag Helpers ..........................................................................118
Problem ..............................................................................................................................................118
Solution...............................................................................................................................................118
How It Works .......................................................................................................................................119
4-7. Improving Performance with the Cache Tag Helper ..............................................124
Problem ..............................................................................................................................................124
Solution...............................................................................................................................................124
How It Works .......................................................................................................................................124
4-8. Using the Environment, Script, and Link Tag Helpers for Conditionally
Rendering Script and Link Tags ............................................................................132
Problem ..............................................................................................................................................132
Solution...............................................................................................................................................132
How It Works .......................................................................................................................................132
4-9. Creating a Custom Tag Helper...............................................................................134
Problem ..............................................................................................................................................134
Solution...............................................................................................................................................134
How It Works .......................................................................................................................................134
■ Chapter 5: Getting the Most from the New Features in ASP�NET Core MVC �������139
5-1. Understanding NuGet with ASP.NET Core MVC .....................................................139
Problem ..............................................................................................................................................139
Solution...............................................................................................................................................139
How It Works .......................................................................................................................................140
5-2. Upgrading from ASP.NET MVC 5 to ASP.NET Core MVC .........................................144
Problem ..............................................................................................................................................144
Solution...............................................................................................................................................145
How It Works .......................................................................................................................................145
5-3. Upgrading from Web API to ASP.NET MVC 6 ..........................................................148
Problem ..............................................................................................................................................148
Solution...............................................................................................................................................148
How It Works .......................................................................................................................................149
5-4. Creating a Tag Cloud Using a View Component ....................................................158
Problem ..............................................................................................................................................158
Solution...............................................................................................................................................158
How It Works .......................................................................................................................................158
5-5. Using the Inject Feature to Implement a Hit Counter ............................................166
Problem ..............................................................................................................................................166
Solution...............................................................................................................................................166
How It Works .......................................................................................................................................167