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POLinq To Entites error: The entity or complex type .... cannot be constructed in a LINQ to Entities query
 

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  1. POLinq To Entites error: The entity or complex type .... cannot be constructed in a LINQ to Entities query
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    <p>I have been pulling my hair out trying to do the MVC 3 Music Store tutorial found on the asp.net website. In the below code I am trying to use a Linq to Entities query to return results to my Browse view from the storeController but I receive this error when I navigate to the browse page: <em>The entity or complex type 'MvcMusicStore.Models.Genre' cannot be constructed in a LINQ to Entities query</em>. </p> <p>The code below works when I use the Lambda expression that they use in tutorial but I am more comfortable using a Linq Query. Please can someone explain to me why this doesn’t work using the following code? </p> <p><strong>Storecontoller.cs</strong></p> <pre><code>MusicStoreEntities storeDB = new MusicStoreEntities(); public ActionResult Browse(string genre) { //working code used in tutorial //var genreModel = storeDB.Genres.Include("Albums") //.Single(g =&gt; g.Name == genre); storeDB.Genres.Include("Albums"); var genreModel = from p in storeDB.Genres where p.Name == genre select new Genre { GenreId = p.GenreId, Name = p.Name, Description = p.Description, Albums = p.Albums }; return View(genreModel.Single()); } </code></pre> <p><strong>Genre.cs</strong></p> <pre><code>using System.Collections.Generic; namespace MvcMusicStore.Models { public class Genre { public int GenreId { get; set; } public string Name { get; set; } public string Description { get; set; } public List&lt;Album&gt; Albums { get; set; } } } </code></pre> <p><strong>MusicStoreEntities.cs</strong></p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data.Entity; namespace MvcMusicStore.Models { public class MusicStoreEntities : DbContext { public DbSet&lt;Album&gt; Albums { get; set; } public DbSet&lt;Genre&gt; Genres { get; set; } } } </code></pre> <p><strong>browse.cshtml</strong></p> <pre><code>&lt;h2&gt;Browsing Genre: @Model.Name&lt;/h2&gt; &lt;ul&gt; @foreach (var album in Model.Albums) { &lt;li&gt; @album.Title &lt;/li&gt; } &lt;/ul&gt; </code></pre> <p>Many thanks desperate dave</p>
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    1. USLadislav Mrnka
    1. USdavey
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