Gain insights into creating dynamic web apps with ASP.NET Core MVC. Explore Razor, localization, advanced features, and best practices for building public and business applications.

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In this course, you will learn how to create a modular, dynamic web application with ASP.NET Core MVC, Razor, and Razor tag-helpers. Furthermore, you will also learn how to localize that application in several languages, and finally how to publish it.

You will cover many different aspects of ASP.NET development including: how to optimize user interfaces, validate user input, how to write clean and maintainable code with dependency injection and configuration data, and a whole lot more.

By the end of this course, you will be able to build both a public website and a business application based on ASP.NET Core MVC, with advanced features such as caching, authentication, and authorizations, and while conforming to Microsoft best-practices.

ASP.NET Core MVC

`IViewLocalizer` and culture-specific views do not cover all needs, as we have:

* General purpose strings that are not associated with specific views but can be used in several views. Since duplications kill modularity and modifiability, we must avoid duplicating these strings in several resource files and place them in unique places. We associate them with types instead of views. These types should be associated with the role of the strings to be translated. For instance, we may associate all strings needed by a business service that is injected into several controllers to the business service type. Global strings such as the application name can be associated with the `Startup` class that represents the whole application. We may also create fake empty classes that represent string roles, just to organize resources around them.

* Messages coming from data annotations. They are automatically added to the views so we can't place them into the indexer of view localizers. These messages are associated with the ViewModels containing the data annotations, so the associated resource files can be associated with those ViewModel types.

## Associating resource files to types ##
Resource files may be associated with types in a way that is completely analogous to the way they are associated with views. So the resource files associated with a `Customer` type are named as shown below:

`IViewLocalizer` and culture-specific views do not cover all needs, as we have:

* General purpose strings that are not associated with specific views but can be used in several views. Since duplications kill modularity and modifiability, we must avoid duplicating these strings in several resource files and place them in unique places. We associate them with types instead of views. These types should be associated with the role of the strings to be translated. For instance, we may associate all strings needed by a business service that is injected into several controllers to the business service type. Global strings such as the application name can be associated with the `Startup` class that represents the whole application. We may also create fake empty classes that represent string roles, just to organize resources around them.

* Messages coming from data annotations. They are automatically added to the views so we can't place them into the indexer of view localizers. These messages are associated with the ViewModels containing the data annotations, so the associated resource files can be associated with those ViewModel types.

# Associating resource files to types ##
Resource files may be associated with types in a way that is completely analogous to the way they are associated with views. So the resource files associated with a `Customer` type are named as shown below:

In this lesson, we will learn how to localize general-purpose strings that are not associated with specific views, and strings coming from data annotations, such as metadata and validation error messages.

Razor Template Language

Razor Language Assessment

Tag Helpers

Tag Helpers Assessment

Controllers and ViewModels

Controllers Assessment

Validation and Metadata

Validation Assessment

Dependency Injection

Configuration and Options Framework

Localization and Globalization

Factoring out UI Logic

Authentication and Authorization

Advanced Topics Assessment

Publishing Your Web Application

Conclusion

Appendix

Localization of Validation and Metadata Strings