Unity 2.0 通过 XML 注册泛型类型 [英] Unity 2.0 registering generic types via XML

问题描述

我正在尝试在 Unity 2.0 的配置文件中注册通用类型，但似乎无法正确设置.我在这里指的是 MS 文档:http://msdn.microsoft.com/en-us/library/ff660933%28v=PandP.20%29.aspx#_Generic_Types

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.microsoft.com/en-us/library/ff660933%28v=PandP.20%29.aspx#_Generic_Types

代码如下:

public interface IRepository<T> where T : class
{
    ...
}

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

public class BlogRepository : GenericRepository<BlogRepository>
{
    ...
}

我现在的 XML 配置看起来像这样:

The XML config i have at the moment loks like this:

<unity>
    <!-- Aliases -->
    <alias alias="BlogIRepository" 
           type="X.Services.Interfaces.IRepository[[X.Domain.Entities.Blog, X.Domain]], X.Services"/>

    <alias alias="BlogRepository" 
           type="X.Repositories.BlogRepository, X.Repositories"/>

    <!-- Type registration -->
    <container name="development">
        <!-- Common connection string value -->
        <instance name="Conn" type="System.String" value="blahblahblah"/>
        <register type="BlogIRepository" mapTo="BlogRepository">
            <constructor>
                <param name="connectionString" type="System.String" dependencyName="Conn"/>
            </constructor>
        </register>
    </container>
</unity>

根据注册泛型类型的文档，您在泛型类型周围使用方括号，如果类型不是系统类型，则在更多方括号内提供完全限定类型.这就是我所做的，我想.然而 - 没有工作.

According to the documentation to register generic types you use square brackets around the generic type(s), and if the type is not a system type you provide the fully qualified type inside more square bracket. Which is what i have done, i think. Yet - no worky.

编辑:来自 MSDN 站点的示例:

EDIT: Example from the MSDN site:

<register type="IDictionary[string, [MyApp.Interfaces.ILogger, MyApp]]"/>

产生的错误是:

无法解析类型名称或别名 IRepository.请检查您的配置文件并验证此类型名称.

The type name or alias IRepository could not be resolved. Please check your configuration file and verify this type name.

推荐答案

MSDN 没有错.我们特别添加了一些快捷解析规则，这样大多数情况下您就不必输入所有的`'s和方括号.

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.

我拼凑了一个和你的很像的例子:

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
{

}

我的 XML 配置如下所示:

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>

它只是有效.

您是否有机会尝试使用 IRepository 的别名而不是命名空间/程序集搜索?我使用别名也可以使用以下方法:

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>

为别名指定类型时，必须使用 CLR 类型语法.您可以在其他任何地方使用通用快捷语法.

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

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