Getting Started with Ninject in an MVC3 application
Using the Library Package manager, I added Ninject and Ninject.Web.MVC to my project.
I went down a bit of a rabbit hole because tutorials told me to modify the MvcApplication to inherit from NinjectHttpApplication and set up my modules here:
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<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum3"> 3:</span> <span style="color: #008000">// Modify global.asax to inherit from NinjectHttpApplication</span></pre>
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<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span> <span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> MvcApplication : NinjectHttpApplication</pre>
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Change Application_Start() to override OnApplicationStarted()
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What I didn’t realize is that adding the Ninject.Web.Mvc package adds App_StartNinjectMVC3.cs which does all of this for me. I was getting errors saying that Ninject was already initialized because I was initializing it in MvcApplication as well as in this extra file that was added.
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(I just found this <a href="https://github.com/ninject/ninject.web.mvc/wiki/Setting-up-an-MVC3-application" target="_blank">documentation</a> explaining both approaches)<br />
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Instead of I should now add my type binding modules in the RegisterServices method of NinectMvc3 class:
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<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum2"> 2:</span> <span style="color: #008000">/// Load your modules or register your services here!</span></pre>
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<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: #f4f4f4; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum4"> 4:</span> <span style="color: #008000">/// <param name="kernel">The kernel.</param></span></pre>
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<pre style="border-bottom-style: none; text-align: left; padding-bottom: 0px; line-height: 12pt; background-color: white; margin: 0em; border-left-style: none; padding-left: 0px; width: 100%; padding-right: 0px; font-family: 'Courier New', courier, monospace; direction: ltr; border-top-style: none; color: black; border-right-style: none; font-size: 8pt; overflow: visible; padding-top: 0px"><span style="color: #606060" id="lnum5"> 5:</span> <span style="color: #0000ff">private</span> <span style="color: #0000ff">static</span> <span style="color: #0000ff">void</span> RegisterServices(IKernel kernel)</pre>
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I defined my type binding module like this:
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Now I can create a constructor on my controllers that take the dependencies I need, and Ninject will automagically pass them in:
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Ninject documentation on <a href="https://github.com/ninject/ninject/wiki/Modules-and-the-Kernel" target="_blank">Modules and the Kernel</a>.
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To specify specific contructor arguments for the binding, use .WithConstructorArguments("<argument>", <value>");
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