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POUsing the instance version of CreateMap and Map with a WCF service?
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copied!<p>Been having some real issues with automapper. I think I have found the solution but unsure of how to implement it.</p> <p>basically I am using a custom mapping with ResolveUsing and ConstructedBy to pass in params to the constructor, I understand that most people set this up in the global.asax once and forget about it.</p> <p>But the problem is that my method (on a wcf) passes in different params to the constructor of a ResolveUsing ...... </p> <p>Before I was using the Mapper.CreateMap and Mapper.Map which are static methods and it appears that when different petitions come into the wcf service via methods (multi -user) they are conflicting with each other.</p> <p>After reading something it appears I can use the instance version of CreateMap and Map so that each individual petition gets its own map and can pass in its own params.</p> <p>But I can't seem to find how to do it. Can anyone explain please? I am really stuck...</p> <p>Before now and again I would get duplicate key errors and also I put in a log trace on the constructor and it appears that 1 petition is overwriting the other - hence the static versions of Mapper.</p> <p>Well I hope I am correct, but I can't find anything else...</p> <p><strong>EDITED - AN EXAMPLE OF WHAT I HAVE</strong></p> <p>Basically all mapping is working as it should, as I am using MapFrom in most cases.</p> <p>Then I create an instance of my Resolver which I pass in a URL. I have checked the url before I pass it in and its correct. But once it returns it returns the wrong URL.</p> <p>The reason I need pass in the URL is that it has variables in there so I need to replaced the variables... Basically there are 2 urls depending on the office and I have logs everywhere and I can see what I am passing in but once I pass it in - it isn't the one I passed in, if that makes sense, this is weird!! </p> <p>Its a WCF service and a client has called the method twice passing in 2 different offices hence 2 different URLs. But they always return the same URL. It's like one session is overwriting the other...</p> <p>I hope this makes sense.</p> <pre><code> SalesPointResolver newSalesPointResolver = new SalesPointResolver(returnReservationUrl, reservationSite.ReservationUrl, startDate, endDate, officeCode); Mapper.CreateMap<Models.Custom.House, DTO.House>() .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.Id)) .ForMember(dest => dest.TaxIncluded, opt => opt.MapFrom(src => src.Segments.FirstOrDefault().TaxIncluded)) .ForMember(dest => dest.TaxPercentage, opt => opt.MapFrom(src => src.Segments.FirstOrDefault().TaxPercentage)) .ForMember(dest => dest.SalesPoints, opt => opt.ResolveUsing(newSalesPointResolver)) ; </code></pre> <p><strong>FOUND OUT WHERE IS FAILING - BUT UNKNOWN WHY</strong></p> <p>See my comments inline with code. In the constructor the urlTemplate arrives, I save it in a private var and then in the overridden ResolveCore it's something else :-)</p> <p>I have placed some log4net logs on there, so I can see whats happening.</p> <pre><code>[Log] public class SalesPointResolver : ValueResolver<Models.Custom.House, IList<DTO.SalesPoint>> { private readonly ILog log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); private string urlTemplate; public SalesPointResolver (bool returnReservationUrl, string urlTemplate, DateTime startDate, DateTime endDate, string officeCode) { this.urlTemplate = urlTemplate; log.Error("passed in " + urlTemplate); // THIS IS PERFECT log.Error("I am now " + this.urlTemplate); // THIS IS PERFECT } protected override IList<DTO.SalesPoint> ResolveCore(House source) { this.house = source; log.Error("in resolveCore :" + this.urlTemplate); // THIS IS RETURNING THE WRONG VALUE </code></pre> <p><strong>TEMPORARY SOLUTION</strong></p> <p>I have done a temporary solution but it's really bad. I am sure automapper can do what I am trying, but I am obviously doing something wrong.</p> <p>Basically I return via LINQ a collection of records (THIS IS MY SOURCE) so I entered a new field on every record that has the correct URL template on there. And then, instead of passing in (via constructor) the url template, I have it available as a property on EVERY record on the collection (THE SOURCE) ... and it works perfect.</p> <p>Of course, this really is patch and not ideal but it gets me running.</p> <p>Where am I going wrong?</p>

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