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Configuring MVC 4 with StructureMap

by Jim Geurts on Jun.25, 2012, under Uncategorized

I started a new MVC4 project and wanted to use StructureMap for my IOC container of choice. I followed Phil’s post about wiring up dependency resolvers in mvc 4, but I kept getting the following error: “StructureMapDependencyResolver does not appear to implement Microsoft.Practices.ServiceLocation.IServiceLocator.
Parameter name: commonServiceLocator”

Took a little digging, but I found the CommonServiceLocator project from the Microsoft Patterns and Practice group. That project has a StructureMap implementation of the IServiceLocator interface for StructureMap. After I installed the CommonServiceLocator nuget, I was able to reference IServiceLocator in my code. Taking the code from the CommonServiceLocator implementation, I ended up with the following:

/// <summary> /// Wrapper for IDependencyScope, so that StructureMap plays nicely with built in mvc4 dependency resolution. /// </summary> public class StructureMapDependencyScope : ServiceLocatorImplBase, IDependencyScope { protected readonly IContainer Container; public StructureMapDependencyScope(IContainer container) { if (container == null) throw new ArgumentNullException("container"); Container = container; } public object GetService(Type serviceType) { if (serviceType == null) return null; try { return serviceType.IsAbstract || serviceType.IsInterface ? Container.TryGetInstance(serviceType) : Container.GetInstance(serviceType); } catch { return null; } } /// <summary> /// When implemented by inheriting classes, this method will do the actual work of resolving /// the requested service instance. /// </summary> /// <param name="serviceType">Type of instance requested.</param> /// <param name="key">Name of registered service you want. May be null.</param> /// <returns> /// The requested service instance. /// </returns> protected override object DoGetInstance(Type serviceType, string key) { if (string.IsNullOrEmpty(key)) { return Container.GetInstance(serviceType); } return Container.GetInstance(serviceType, key); } /// <summary> /// When implemented by inheriting classes, this method will do the actual work of /// resolving all the requested service instances. /// </summary> /// <param name="serviceType">Type of service requested.</param> /// <returns> /// Sequence of service instance objects. /// </returns> protected override IEnumerable<object> DoGetAllInstances(Type serviceType) { return Container.GetAllInstances(serviceType).Cast<object>(); } public IEnumerable<object> GetServices(Type serviceType) { return Container.GetAllInstances(serviceType).Cast<object>(); } public void Dispose() { Container.Dispose(); } } /// <summary> /// Wrapper for IDependencyResolver so that StructureMap plays nicely with built in mvc 4 dependency resolution. /// </summary> public class StructureMapDependencyResolver : StructureMapDependencyScope, IDependencyResolver { public StructureMapDependencyResolver(IContainer container) : base(container) { } public IDependencyScope BeginScope() { var child = Container.GetNestedContainer(); return new StructureMapDependencyResolver(child); } }

This will allow you to specify the default dependency resolver by:

Hope this helps someone looking to do the same!

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Jim Geurts is a software developer and entrepreneur located in Milwaukee, WI.

I own Bia Creations , who creates and maintains Acturent and DMB Stream

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Configuring MVC 4 with StructureMap

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