Created
October 11, 2012 22:56
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Generar un diccionario directamente desde una consulta linq
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// forma tradicional, agregando los elementos uno a uno | |
private IDictionary<int, DateTime> GetDiccionaryOriginal(int[] keys) | |
{ | |
var result = new Dictionary<int, DateTime>(); | |
using (var context = DataContextFactory.MyContext) | |
{ | |
context.MY_RECORDs.Where(r => keys.Contains(r.RECORD_ID)) | |
.ToList() | |
.ForEach(r => result.Add(r.RECORD_ID, r.LATEST_UPDATE_TS)); | |
return result; | |
} | |
} | |
// forma declarativa, usando un lambda para la selección de llave y otro para el valor. | |
private IDictionary<int, DateTime> GetDiccionaryNew(int[] keys) | |
{ | |
using (var context = DataContextFactory.MyContext) | |
{ | |
return context.MY_RECORDs | |
.Where(r => keys.Contains(r.RECORD_ID)) | |
.ToDictionary(k => k.RECORD_ID, v => v.LATEST_UPDATE_TS); | |
} | |
} |
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