Generic Repository Pattern with ASP.NET MVC and EF provides a concise overview of the generic repository pattern and its implementation with ASP.NET MVC and Entity Framework. The generic repository pattern allows a single repository to be used for data access across all models by abstracting data logic into a shared repository interface. This reduces redundant code, promotes code reuse, and makes the solution easier to maintain and develop quickly. The document outlines the steps to implement this pattern in an ASP.NET MVC application using EF for data access and data modeling.

1. Generic Repository Pattern
with ASP.NET MVC and EF
Md. Mahedee Hasan
Microsoft MVP | Trainer | Speaker
Software Architect
LeadSoft Bangladesh Limited
Linkedin: http://www.linkedin.com/in/mahedee
Blog: http://mahedee.net/
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2. • MVC Stands for Model – View – Controller
• It is Software Architectural pattern
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What is MVC?

3. • Is an open source web application framework
• It implements the model-view-controller pattern
• MVC design pattern aims to “Separation Of concern”
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What is ASP.NET MVC?

4. • Entity Framework is an ORM.
• Work with relational data using domain-specific
objects
• Eliminates the need for most of the data-access code
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What is ASP.NET EF?

5. DRY?
Don’t repeat yourself
-Means don't write duplicate code
Use generic repository pattern to
implement DRY
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6. • What is Design Pattern?
• Design pattern is a solution of known problems
• What is Software Design Pattern?
• Is a solution of known problems in Software.
• Strategies of solving commonly occurring problems.
• A design pattern is not a finish design.
• It is like a template to solve a problem.
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Software Design Pattern

7. Repository Pattern
• Mediator between BLL and DAL(Data Source)
• It’s a separation layer between Data and Domain
Layer
– Separates data and domain Layer
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8. Benefits of Repository Pattern
• Centralizes data logic or service logic.
• Provides a substitution point for the unit tests
– Both BLL and DAL
• Provides a flexible architecture
– Can adopt new change easily
• Domain driven development is easier
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9. What is Generic Repository Pattern?
• Generally - one repository for one model to access
data.
– Write similar code again and again
• What if Single Repository for all?
• Single repository for data access of all models.
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10. Benefits of Generic Repository Pattern
• Reduce redundancy of code
• Faster development
• Force developer to work same pattern
– Possibility of less error or no error
• Easy to maintain
– Centralize data access logic
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11. Implementation
• Tools and Technology used
– Visual Studio 2013
– Visual C#
– ASP.NET MVC 5
– Entity Framework 6
– Razor view engine
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12. Step 1: Create an ASP.NET MVC 5 application using
Visual Studio 2013
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13. Step 2: Configure connection string in web.config
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14. Step 3: Create Models
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15. Step 4: Create a DbContext in Repository folder.
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16. Step 5: Create IGenericRepository and
GenericRepository in Repository folder
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17. • Step 6:
– Create controllers of each models
– Select template “MVC5 Controller with views, using Entity
Framework”
– Modify Controllers and use Generic Repository in
Controller
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18. • Step 7: Add links to _Layout
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19. • Step 8: Write following command in package manager
console
– PM> Enable-Migrations -ContextTypeName
GenericRepoContext
– PM> Add-Migration initialcreate
– PM> Update-Database -Verbose -Force
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20. Step 9: Run Project
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