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    copied!<p>Try using named instances:</p> <pre> <code> IUnityContainer container = new UnityContainer(); container.RegisterType&lt;Type1&gt;(); container.RegisterType&lt;Type2&gt;("Instance 1", new ContainerControlledLifetimeManager()); container.RegisterType&lt;Type2&gt;("Instance 2", new ContainerControlledLifetimeManager()); container.RegisterType&lt;Type3&gt;(); Type1 type1 = container.Resolve&lt;Type1&gt;(); if (type1 == ...) { Type2 instance1 = container.Resolve&lt;Type2&gt;("Instance 1"); } else { Type2 instance2 = ontainer.Resolve&lt;Type2&gt;("Instance 2"); } </code> </pre> <p>You can do some checks on type 1 and decide which instance of type 2 you will need. Note that the "new ContainerControlledLifetimeManager()" parameter will initialize a singleton instance of the resisted type, so you will always get the same instance of type 2.</p> <p><strong>Update:</strong> Same with interfaces. Hope this helps.</p> <pre> <code> IUnityContainer container = new UnityContainer(); container.RegisterType&lt;TextDocument&gt;(); container.RegisterType&lt;ImageDocument&gt;(); container.RegisterType(typeof (IView), typeof (TextView), "Text", new ContainerControlledLifetimeManager()); container.RegisterType(typeof (IView), typeof (ImageView), "Image", new ContainerControlledLifetimeManager()); IDocument document = container.Resolve&lt;TextDocument&gt;(); IView view = null; if (document is TextDocument) { view = container.Resolve&lt;IView&gt;("Text"); } else { view = container.Resolve&lt;IView&gt;("Image"); } view.Show(); </code> </pre>
 

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