如何在 parallel.foreach 循环中使用 autofac

Question

Trying to change a foreach statement to a parallel.foreach. with autofac.

My solution is a webforms site that I am trying to add AutoFac to. The class that I am having a problem with is working with Autofac, with a standard foreach. I would like to transition to a Parrallel.foreach. All the examples show a container.BeginLIfetimeScope() but no information on what container is or how to new one up.

Parallel.ForEach(items, item =>
{
     // Note I'm calling container.BeginLifetimeScope() inside the ForEach
     using (var parallelScope = container.BeginLifetimeScope())
     {
         var aDataService = parallelScope.Resolve<IaDataService>();
         aDataService.SomeProcessing();
     }
 }

Answer 1

The code below compiles and works for me. Given:

public interface IaDataService
{
    void SomeProcessing(object obj);
}

public class DataService : IaDataService
{
    public void SomeProcessing(object obj)
    {

    }
}

We could do something like:

var containerBuilder = new ContainerBuilder();
containerBuilder.RegisterType<DataService>()
    .As<IaDataService>();
var container = containerBuilder.Build();

var items = new List<object>{"abc", 123};
Parallel.ForEach(items, item =>
{
    // Note I'm calling container.BeginLifetimeScope() inside the ForEach
    using (var parallelScope = container.BeginLifetimeScope())
    {
        var aDataService = parallelScope.Resolve<IaDataService>();
        aDataService.SomeProcessing(item);
    }
});

Using WebForms, you're likely better off using the specific integration for it: Autofac WebForms , and there are other best practice questions about thread safety, generating new scopes for each item you generate etc. But the above should be enough to get started.