Comments on: AutoMapper feature: projection

By: Tim

Tim — Wed, 13 Oct 2010 04:24:17 +0000

Is it possible to do partial mapping, ie we have large forms that are split across multiple pages. We have view models for each form but we have to map all of the data back.

The requirement for all source members to be mapped makes this difficult.

By: Mike

Mike — Wed, 22 Apr 2009 05:04:47 +0000

Automapper is a great little tool, we just started using it on one of our projects. The syntax is very fluid. Good work!

By: Lubos

Lubos — Tue, 24 Feb 2009 11:09:00 +0000

I like Jimmy’s version because it’s done declarative way and without possible side-effects. That’s big win for me.

Jimmy could still simplify .ForMember method

for example:

.ForMember(dest => dest.EventDate, opt => opt.MapFrom(src => src.EventDate.Date))

could also become

.ForMember(dest => dest.EventDate, src => src.EventDate.Date)

I have no idea why MapFrom method is so important.

By: Ramon Smits

Ramon Smits — Tue, 24 Feb 2009 09:11:38 +0000

I see benefits in using the automapper but why whould I use it for these kind of mappings? As doing the mapping in normal code would be much more readable.

You could ofcourse just add this code into the mapper. Something like:

Mapper.CreateMap(delegate(CalendarEvent src, CalendarEventForm dst){
var date = src.EventDate;
dst.EventData = date.Date;
dst.EventHour = date.Hour;
dst.EventMinute = date.Minute;
});

Much more readable the the mapping code.