c# - How to Get Closest Location in LINQ to Entities -


i trying closest location via linq query:

var coord = new geocoordinate(loc.latitude, loc.longitude); var nearest = ctx.locations                  .select(x => new locationresult {                      location = x,                      coord = new geocoordinate(x.latitude.getvalueordefault(),                                                x.longitude.getvalueordefault())                  })                  .orderby(x => x.coord.getdistanceto(coord))                  .first();  return nearest.location.id;

however, getting following error:

only parameterless constructors , initializers supported in linq entities.

i have tried googling still not sure how fix it. parameterless constructor?

you need try instead:

var coord = new geocoordinate(loc.latitude, loc.longitude);                 var nearest = ctx.locations                     .select(x => new locationresult {                         location = x,                         coord = new geocoordinate { latitude = x.latitude ?? 0, longitude = x.longitude ?? 0 }                     })                     .orderby(x => x.coord.getdistanceto(coord))                     .first();                  return nearest.location.id;

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