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PONinject EF4, Repository and Unit of Work
 

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    <p>I have several projects in my solution which access the same data so I am implementing data access later in a separate project. Currently I am using EF4, a generic repository and a Unit Of Work pattern. I have designed my data access to support dependency injection and I want to use Ninject. Here is a sample of what I have so far</p> <pre><code>public class Account { public int Id { get; set; } public Guid WebId { get; set; } public string Firstname { get; set; } public string Lastname { get; set; } public string Email { get; set; } public string Address { get; set; } public string Mobile { get; set; } } public interface IRepository&lt;T&gt; { IEnumerable&lt;T&gt; Get(Expression&lt;Func&lt;T, bool&gt;&gt; filter, Func&lt;IQueryable&lt;T&gt;); T GetById(int id); void Update(T dinner); void Insert(T dinner); void Delete(int id); void Save(); } </code></pre> <p>I also have a Repository Implementation which I won't post it here for space.</p> <p>My UnitOfWork looks like this</p> <pre><code>public class UnitOfWork { private Repository&lt;Account&gt; _accountRepository; public IRepository&lt;Account&gt; AccountRepository { get { if (this._accountRepository == null) { _accountRepository = new Repository&lt;Account&gt;(); } return _accountRepository; } } } </code></pre> <p>How and where do I set up ninject to auto resolve my Repository so I can use the interface and not need to instantiate it in my unit of work. Is this the right thing to do or am I getting the point of DI all wrong? Here is what I think I want my unit of work class to look like</p> <pre><code>public class UnitOfWork { IKernel _kernel; public UnitOfWork() { _kernel = new StandardKernel(); } private IRepository&lt;Account&gt; _accountRepository; public IRepository&lt;Account&gt; AccountRepository { get { if (this._accountRepository == null) { _accountRepository = _kernel.Get&lt;IRepository&lt;Account&gt;&gt;();; } return _accountRepository; } } } </code></pre>
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    1. COFYI, in almost all cases (except very specialized frameworks) it's incorrect to call _kernel.Get(). This is known as service location, and is a well known anti-pattern. See http://blog.ploeh.dk/2010/02/03/ServiceLocatorisanAnti-Pattern/
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      1. USErik Funkenbusch
    2. COrelated? http://stackoverflow.com/questions/10520729/ninject-unitofwork-confusion (Your question is rambling and unfocused - I dont know what your problem is when I've finished reading it)
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      1. USRuben Bartelink
 

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