How Can I Ignore Unmapped Properties When Using AutoMapper in C#?

Overcoming Mapping Issues with Automapper: Ignoring Unmapped Properties

Automapper is a widely-used library for efficiently mapping objects in C#. In certain scenarios, it is possible to encounter exceptions due to mismatched properties between the source and destination objects. For instance, if the source object contains a property that is not present in the destination object, Automapper may generate an error.

Avoiding Property Mapping with Automapper

To prevent Automapper from mapping a specific property, utilize the Ignore() method. This method allows developers to explicitly instruct Automapper to disregard a particular property during the mapping process. Let's consider the case presented in the provided query.

Solution:

Mapper.CreateMap<OrderModel, Orders>()
    .ForMember(x => x.ProductName, opt => opt.Ignore());

By adding this line to the mapping configuration, Automapper will ignore the ProductName property of the OrderModel class during the mapping process. It will focus on mapping only the properties that exist in both the source and destination objects.

Updates in AutoMapper

It is worth noting that the Ignore method has been replaced with DoNotValidate in newer versions of AutoMapper. Therefore, the updated code would be:

Mapper.CreateMap<OrderModel, Orders>()
    .ForSourceMember(x => x.ProductName, opt => opt.DoNotValidate());

By leveraging this adjustment, Automapper will effectively ignore the mapping of the specified property, providing a seamless and accurate mapping experience.

The above is the detailed content of How Can I Ignore Unmapped Properties When Using AutoMapper in C#?. For more information, please follow other related articles on the PHP Chinese website!