The code which was modified to apply the Repository Strategy Pattern will be reviewed in this video. Reynald will explain what code was there before the modifications and the new changes that were made. Specifically, he will cover those related to CRUD (Create, read, update, delete) operations and the disposing of objects.
- [Voiceover] I have here an MVC application…that maintains a database of students…and faculty members.…What I'm going to do is step through…the relevant parts I added and changed…to convert the architecture…to conform to the repository pattern.…So the first thing I did is created…an interface called IStudentRepository.…And that's in the DAL folder.…So let's navigate to the DAL folder…and open up IStudentRepository.…Now the code here is fairly straightforward.…
It declares a typical set of CRUD method signatures,…CRUD standing for Create Read Update Delete.…And it includes two read methods:…one that returns all student entities…and one that finds a single student entity by ID.…The next thing I did is created a StudentRepository class…which is the concrete implementation of this interface.…That's also in the DAL folder.…So let's open that up.…So there's quite a bit in this file here…so I separated the code into parts.…
In part one, I have the repository database context…defined as a class variable…and the constructor expects the calling object…
Author
Reynald Adolphe
Released
5/31/2016In this course, developer and technologist Reynald Adolphe explains the purpose and effective use of eight design patterns, including six Gang of Four design patterns and two .NET patterns. Gang of Four patterns fall under three categories: structural, creational, and behavioral. Reynald helps you learn about select patterns from each category. He describes each pattern and demonstrates how programmers can leverage them in real-world applications.
- Factory Method
- Abstract Factory
- Singleton pattern
- Decorator pattern
- Iterator pattern
- Observer pattern
- Repository pattern
- Unit of Work pattern
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 28s
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1. Overview
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Design patterns explained1m 19s
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The need for design patterns1m 31s
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Design pattern categories1m 35s
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2. Factory Method
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Factory pattern overview1m 36s
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Code the Factory pattern4m 16s
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3. Abstract Factory
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4. Singleton Pattern
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Singleton pattern overview1m 44s
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Thread safety2m 42s
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5. Decorator Pattern
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Decorator pattern overview2m 54s
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Concrete Component code2m 37s
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Concrete Decorator code2m 42s
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6. Iterator Pattern
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Aggregate setup2m 7s
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Iterator setup and execution4m 53s
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7. Observer Pattern
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Observer pattern overview2m 22s
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Concrete Subject code3m 23s
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8. Repository Pattern
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MVC Project setup8m 14s
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Create a Generic Repository2m 29s
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9. Unit of Work Pattern
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Convert to Unit of Work3m 53s
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Conclusion
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Next Steps28s
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Video: Convert to a Repository pattern