使用Automapper的ResolveUsing方法，实现将两个源字段合并映射到一个目标字段的功能。

代码示例：

1. 定义源对象和目标对象

public class SourceObject { public string FirstName { get; set; } public string LastName { get; set; } }

public class DestinationObject { public string FullName { get; set; } }

2. 配置Automapper，使用ResolveUsing方法将两个源字段合并映射到FullName字段

Mapper.Initialize(config => { config.CreateMap() .ForMember(dest => dest.FullName, opt => opt.ResolveUsing(src => $"{src.FirstName} {src.LastName}")); });

3. 进行映射

var source = new SourceObject { FirstName = "John", LastName = "Doe" }; var destination = Mapper.Map(source);

// 结果：destination.FullName = "John Doe"