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View MefControllerFactory.cs
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public class MefControllerFactory : IControllerFactory
{
private readonly WebScopedContainerManager _containerManager;
 
public MefControllerFactory(WebScopedContainerManager containerManager)
{
_containerManager = containerManager;
}
 
#region IControllerFactory Members
 
public IController CreateController(RequestContext requestContext, string controllerName)
{
string version = requestContext.RouteData.Values["version"].ToString();
var container = _containerManager.GetRequestContainer(requestContext.HttpContext.Items);
var controllers = container.GetExports<IController, IDictionary<string, object>>();
 
controllers = controllers
.Where(exp =>
exp.Metadata.ContainsKey(Constants.MetaControllerName)
&& String.Equals(exp.Metadata[Constants.MetaControllerName].ToString(), controllerName, StringComparison.InvariantCultureIgnoreCase))
.Where(exp =>
exp.Metadata.ContainsKey(Constants.MetaControllerName)
&& String.Equals(exp.Metadata[Constants.MetaApiVersion].ToString(), version, StringComparison.InvariantCultureIgnoreCase));
 
var controllerExport = controllers.FirstOrDefault();
 
if (controllerExport == null)
return null;
 
return controllerExport.Value;
}
 
public void ReleaseController(IController controller)
{
}
 
#endregion
}
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