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POHow can I resolve a service based upon generic type argument in Castle Windsor?
 

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  1. POHow can I resolve a service based upon generic type argument in Castle Windsor?
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    <p>I have an installer like this:</p> <pre><code>public void Install(IWindsorContainer container, IConfigurationStore store) { //Services container.Register( Classes.FromAssemblyNamed(ASSEMBLY_NAME) .BasedOn&lt;IService&gt;() .WithServiceFirstInterface() .LifestyleTransient()); //Repository container.Register( Component.For(typeof(IRepository&lt;&gt;)) .ImplementedBy(typeof(Repository&lt;&gt;)) .LifestyleTransient()); //Contexts container.Register( Component.For(typeof(Context&lt;IGlobalObject&gt;)) .ImplementedBy(typeof(GlobalContext&lt;&gt;)).LifestyleTransient()); } </code></pre> <p>The repository is an open generic, and it has a Context constructor injected, which is a wrapper around an EF DbContext, but takes a type argument to indicate the database it needs to connect to. The idea is that I have several DbContexts as I need to connect to multiple databases, and I want windsor to resolve the appropriate DBcontext based upon the type argument passed to the repository.</p> <p>The repositories type argument is constrained to the following (GlobalObject and GlobalContext refer to types associated with 1 such database):</p> <pre><code>public interface IGlobalObject : IObject {} public interface IObject { int Key { get; set; } } </code></pre> <p>However, Windsor cannot resolve the context, and I cannot work out why? It is registered and in the container, but it cannot resolve.</p> <p><strong>EDIT:</strong></p> <p>Code for GlobalContext:</p> <pre><code>public class GlobalContext&lt;T&gt; : Context&lt;T&gt; where T : IGlobalObject { private const string GLOBAL_CSTR = "Global"; public GlobalContext() : base(ConfigurationManager.ConnectionStrings[GLOBAL_CSTR].ConnectionString) {} public DbSet&lt;Company&gt; Companies { get; set; } public DbSet&lt;ConnectionString&gt; ConnectionStrings { get; set; } public DbSet&lt;Server&gt; Servers { get; set; } } </code></pre> <p>Context:</p> <pre><code>//Wrapper around dbcontext which enforces type public abstract class Context&lt;T&gt; : DbContext where T : IObject { protected Context() {} protected Context(string connectionString) : base(connectionString){} } </code></pre> <p><strong>Edit 2:</strong></p> <p>If i specify the concrete types for every scenario it works, so it is clearly something to do with matching on the interface.</p> <pre><code>//Contexts container.Register( Component.For(typeof(Context&lt;Server&gt;)) .ImplementedBy(typeof(GlobalContext&lt;Server&gt;)).LifestyleTransient()); </code></pre>
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