ASP.NET Core: Building a GraphQL API

Learn about the core concepts of GraphQL, including how to build a GraphQL API in an existing ASP.NET Web API project.

Introduction

• Using GraphQL API
• What you should know

1. Getting Started with GraphQL

• What is GraphQL?
• GraphQL vs. REST
• Open-source GraphQL projects
• .NET Web API project overview
• Setting up GraphQL in Web API

2. Data Querying with GraphQL in .NET Web API

• Operations in GraphQL
• Types in GraphQL
• Adding your first object graph type (course entity)
• Adding your first query: All courses
• Challenge: Add query to get single course
• Solution: Add query to get single course
• Adding your GraphQL schema file
• Testing

3. Data Mutation with GraphQL in .NET Web API

• What is a mutation?
• Adding your first mutation: Add data
• Add data: Testing
• Challenge: Mutation to update data
• Solution: Mutation to update data
• Update data: Testing
• Mutation to delete data

4. Querying and Mutating Relational Data with GraphQL in .NET Web API

• Adding relationship data
• Query to get relational data
• Get relational data: Testing
• Mutation to add relational data
• Add relational data: Testing

Conclusion

• Next steps for learning more about GraphQL API