Unity 2.0 registering generic types via XML

Question

I am trying to register a generic type in a config file for Unity 2.0 but can\'t seem to get it right. I have been referring to the MS documentation here : http://msdn.micro

Answer 1

I think you need to add `1, as the examples here on MSDN would suggest:

type="X.Services.Interfaces.IRepository`1[[X.Domain.Entities.Blog, X.Domain]], X.Services"

Answer 2

MSDN is NOT wrong. We specifically added some shortcut parsing rules so that you don't have to enter all the `'s and square brackets in most cases.

I slapped together an example that looks mostly like yours:

public interface IRepository<T> where T: class
{

}

public class GenericRepository<T> : IRepository<T> where T : class
{

}

public class BlogRepository : GenericRepository<Blog>
{

}

public class Blog
{

}

My XML config looks like this:

  <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <namespace name="UnityConfigExample"/>
    <assembly name="UnityConfigExample"/>

    <container>
      <register type="IRepository[]" mapTo="GenericRepository[]" />
      <register type="IRepository[Blog]" mapTo="BlogRepository" />
    </container>
  </unity>

and it just works.

Were you by any chance trying to use an alias for IRepository instead of the namespace / assembly search? I got the following to work as well using aliases:

  <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <alias alias="IRepository" type="UnityConfigExample.IRepository`1, UnityConfigExample" />
    <alias alias="GenericRepository" type="UnityConfigExample.GenericRepository`1, UnityConfigExample"/>
    <alias alias="BlogRepository" type="UnityConfigExample.BlogRepository, UnityConfigExample"/>
    <alias alias="Blog" type="UnityConfigExample.BlogRepository, UnityConfigExample"/>

    <container>
      <register type="IRepository[]" mapTo="GenericRepository[]" />
      <register type="IRepository[Blog]" mapTo="BlogRepository" />
    </container>
  </unity>

When you specify the type for an alias, you must use the CLR type syntax. Everywhere else you can use the generic shortcut syntax.

Answer 3

you're missing a ` character before [[ (below Esc on my keyboard)