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POHow can I call a method from within a LINQ expression?
 

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  1. POHow can I call a method from within a LINQ expression?
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    <p>I've my Model something maybe like this :</p> <pre><code> public class Person { public virtual Guid ID { get; set; } public virtual string FirstName { get; set; } public virtual string LastName { get; set; } //this LazyList takes IQueryable&lt;T&gt; in constructor public virtual LazyList&lt;Role&gt; Roles { get; set; } //this method to convert the object that comes from EF to my own model public static Person FromData(DBPerson dbPerson) { if (dbPerson != null) return new Person { ID = dbPerson.ID, FirstName = dbPerson.FirstName, LastName = dbPerson.LastName, }; return null; } } </code></pre> <p>Then in my Repository I've method to get all persons but i need it to give to the <code>LazyList&lt;Role&gt;</code> property result from other private method "getRoles". My repository looks like this:</p> <pre><code> public IQueryable&lt;Person&gt; GetPersons() { var list = from dbPerson in context.Persons select Person.FromData(dbPerson); // Here is the problem :( return list; } private LazyList&lt;Role&gt; getRoles(GUID userID) { var list = from role in db.Roles where role.UserID == userID select role.ToModel(); return new LazyList&lt;Role&gt;(list); } </code></pre> <p><strong>I want something here to tell this Linq statement that i want Person.Roles to get its value from "getRoles" method</strong></p> <p>Maybe someone will tell me to put the logic of converting the dbPerson to my Person in the repository and then put something like this :</p> <pre><code> public IQueryable&lt;Person&gt; GetPersons() { var list = from dbPerson in context.Persons select new Person{ ID = dbPerson.ID, FirstName = dbPerson.FirstName, LastName = dbPerson.LastName, Roles = getRoles(dbPerson.ID)}; } </code></pre> <p>OK that will work but i really need to put the logic of converting dbPerson to my model in separate method because i'll sue it many times in my solution.</p> <p>So how to do that ?</p>
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