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POIs there a pattern for initializing objects created via a DI container
 

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    <p>I am trying to get Unity to manage the creation of my objects and I want to have some initialization parameters that are not known until run-time:</p> <p>At the moment the only way I could think of the way to do it is to have an Init method on the interface.</p> <pre class="lang-cs prettyprint-override"><code>interface IMyIntf { void Initialize(string runTimeParam); string RunTimeParam { get; } } </code></pre> <p>Then to use it (in Unity) I would do this:</p> <pre class="lang-cs prettyprint-override"><code>var IMyIntf = unityContainer.Resolve&lt;IMyIntf&gt;(); IMyIntf.Initialize("somevalue"); </code></pre> <p>In this scenario <code>runTimeParam</code> param is determined at run-time based on user input. The trivial case here simply returns the value of <code>runTimeParam</code> but in reality the parameter will be something like file name and initialize method will do something with the file.</p> <p>This creates a number of issues, namely that the <code>Initialize</code> method is available on the interface and can be called multiple times. Setting a flag in the implementation and throwing exception on repeated call to <code>Initialize</code> seems way clunky.</p> <p>At the point where I resolve my interface I don't want to know anything about the implementation of <code>IMyIntf</code>. What I do want, though, is the knowledge that this interface needs certain one time initialization parameters. Is there a way to somehow annotate(attributes?) the interface with this information and pass those to framework when the object is created?</p> <p>Edit: Described the interface a bit more.</p>
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    1. USIgor Zevaka
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    1. COYou're missing the point of using a DI container. Dependencies are supposed to be resolved for you.
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    2. COWhere are you getting your needed parameters from? (config file, db, ??)
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    3. CO`runTimeParam` is a dependency that is determined at run-time based on a user input. Should the alternative for this be splitting it into two interfaces - one for initialization and another for storing values?
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      1. USIgor Zevaka
 

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