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Contracts & Inputs - ASP.NET Core Practical API Labs | Aporeon

ASP.NET Core Practical API Labs

Contracts & Inputs

Typed results, validation, bounded queries, and explicit writable DTOs.

4 drillsPractice one at a timeOrdered pathCoding problem

Recommended start

Typed Create Endpoint

Creates a resource through an explicit request DTO and returns typed 201, 409, and validation outcomes.

Easy~15 minStep 1 of 4

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1Typed Create EndpointRecommended startCreates a resource through an explicit request DTO and returns typed 201, 409, and validation outcomes.Coding problemEasy~15 min.NETASP.NET CoreC#Practice

Practice order

4 drillsOne at a time

1Typed Create EndpointUp next / Easy / ~15 min
2Validation ContractEasy / ~15 min
3Safe List QueryMedium / ~25 min

2

Validation ContractProduces field-keyed validation errors through one reusable endpoint boundary.Coding problemEasy~15 min.NETASP.NET CoreC#

Practice

3Safe List QueryImplements bounded filtering and deterministic keyset pagination without accepting arbitrary query expressions.Coding problemMedium~25 min.NETASP.NET CoreC#Practice

4Overposting BoundaryUpdates only public mutable fields and leaves ownership, status, and audit values server-controlled.Coding problemEasy~15 min.NETASP.NET CoreC#Practice

4

Overposting Boundary

Easy / ~15 min