c# - AutoMapper conditional map for recursive model -

i've got recursive model class following definition:

public class itemfilterblockgroup {     public itemfilterblockgroup(string groupname, itemfilterblockgroup parent, bool advanced = false)     {         groupname = groupname;         parentgroup = parent;         advanced = advanced;         childgroups = new list<itemfilterblockgroup>();     }      public string groupname { get; private set; }     public bool advanced { get; private set; }     public itemfilterblockgroup parentgroup { get; private set; }     public list<itemfilterblockgroup> childgroups { get; private set; } } 

it has property called childgroups list of - used build hierarchical model. i'm trying map model view models, conditionally. (depending on ui setting) want include child objects advanced = false, , want include models.

currently i'm achieving nasty hack involves mapper.reset() , runtime re-definition of maps - not , presents multiple problems:

mapper.reset(); if (showadvanced) {     mapper.createmap<itemfilterblockgroup, itemfilterblockgroupviewmodel>(); } else {     mapper.createmap<itemfilterblockgroup, itemfilterblockgroupviewmodel>()         .formember(dest => dest.childgroups,             opts => opts.mapfrom(from => from.childgroups.where(c => c.advanced == false))); }  var mappedviewmodels = mapper.map<observablecollection<itemfilterblockgroupviewmodel>>(blockgroups); 

given example input hierarchy of models:

root (advanced = false) +-child 1 (advanced = true) +-child 2 (advanced = false) +-child 3 (advanced = false)   +-child 3 sub child 1 (advanced = false)   +-child 3 sub child 2 (advanced = true) 

the first createmap definition returns hierarchy untouched, , second createmap definition (with advanced parameter) returns modified hierarchy (all advanced = true models , children excluded mapping):

root (advanced = false) +-child 2 (advanced = false) +-child 3 (advanced = false)   +-child 3 sub child 1 (advanced = false) 

how can parameterise showadvanced condition , achieve same result single createmap definition? i've searched lot right solution, tried resolveusing, customresolvers, no avail.

you can use context option items collection pass values map function @ runtime:

var showadvanced = true; var mappedviewmodels = mapper.map<observablecollection<itemfilterblockgroupviewmodel>>(     blockgroups,      options => options.items["includeadvanced"] = showadvanced); 

and use them anywhere context available construct destination object. within resolveusing or constructusing methods example:

mapper.createmap<itemfilterblockgroup, itemfilterblockgroupviewmodel>()     .formember(destination => destination.childgroups, options => options.resolveusing(         (resolution) =>         {             var includeadvanced = (bool)resolution.context.options.items["includeadvanced"];             var source = (itemfilterblockgroup)resolution.context.sourcevalue;             if(includeadvanced)                 return source.childgroups;             else                 return source.childgroups.where(c => c.advanced == false);                         })); 

if usage of weakly typed dictionary values pass flag argument not pretty suggest encapsulate logic within 2 separated methods, in martin fowler article example.