Automapper map list property. In some special cases I want to map only some properties and perform...

Automapper map list property. In some special cases I want to map only some properties and perform additional checks. AutoMapper uses a convention-based matching algorithm to match up source to destination values. Map<List<Person>, List<PersonViewModel>>(people); Mapper. May 8, 2015 · I just started to use automapper to map DTOs&lt;->Entities and it seems to be working great. AssertConfigurationIsValid(); From Getting Started: How do I use AutoMapper? First, you need both a source and destination type to work with. You will have to use the AfterMap() method for iterating over the objects in the list and assigning to a property of them the value of a parent (source) property. AutoMapper uses a fluent configuration API to define an object-object mapping strategy. GitHub: Let’s build from here · GitHub Nov 21, 2012 · Automapper: Auto map collection property for a dto object Asked 13 years, 3 months ago Modified 13 years, 2 months ago Viewed 23k times I am struggling with the Automapper syntax. As long as type B follows AutoMapper’s . Nov 20, 2025 · In this blog, we’ll walk through a step-by-step guide to solve this exact problem: mapping a nested `List<Merchant>` (with nested `Order`s) to a flat `List<OrderViewModel>` using AutoMapper. Jul 3, 2023 · It simply tells AutoMapper about the specific source property to map, akin to dropping a pin on a map for a friend to locate us. Here are the source classes: Nov 17, 2025 · This blog post will guide you through the process of mapping such nested list collections using AutoMapper, with detailed examples and best practices. We’ll cover setup, configuration, edge cases, and best practices. Oct 25, 2018 · Automapper - map list of complex object to list of properties Asked 7 years, 4 months ago Modified 7 years, 4 months ago Viewed 7k times AutoMapper A convention-based object-object mapper. I wish to map each item on the collection into a new object which combines the 2 classes. As shown in the example above, it’s not necessary to explicitly configure list types, only their member types. The entity itself has one property which comes from another source. When mapping to an existing collection, the destination collection is cleared first. Jan 8, 2020 · You don't need to iterate over the collection, map each object and materialize the result into a new list. Jan 24, 2022 · Hi, I have two different classes which I would like to map with another class. CreateMap<Person, PersonViewModel>(); peopleVM = Mapper. Aug 29, 2021 · mapping list of objects using automapper Asked 4 years, 5 months ago Modified 4 years, 5 months ago Viewed 8k times Getting Started Guide What is AutoMapper? AutoMapper is an object-object mapper. AutoMapper is geared towards model projection scenarios to flatten complex object models to DTOs and other simple objects, whose design is better suited for Mar 3, 2010 · How can I use automapper to update the properties values of another object without creating a new one? Mapper. The destination type's design can be influenced by the layer in which it lives, but AutoMapper works best as long as the names of the Aug 30, 2019 · I have a list of DTOs and want to map this list to a list of entites. May 2, 2023 · That’s it. Since the name of both collections is the same, we will not have to add this mapping explicitly. What makes AutoMapper interesting is that it provides some interesting conventions to take the dirty work out of figuring out how to map type A to type B. Can I map this property to all items of the list with one m When mapping a collection property, if the source value is null AutoMapper will map the destination field to an empty collection rather than setting the destination value to null. In this instance, AutoMapper would map ‘FullName’ from the source to the ‘Name’ property in the destination. Aug 13, 2025 · By relying on property naming conventions, AutoMapper can match and map properties with minimal configuration. This significantly reduces repetitive mapping code. Without automap When mapping a collection property, if the source value is null AutoMapper will map the destination field to an empty collection rather than setting the destination value to null. I have a List of PropertySurveys, each containing 1 Property. This does AutoMapper out of the box, if you map a collection to another kind of collection and a mapper is defined for the source to destination elements. Object-object mapping works by transforming an input object of one type into an output object of a different type. unofhw trup vnaodqh xrvj xarakb kktwv prj mxt qkbtjbd fqbffo