如何拦截 Castle Windsor 的组件解析以覆盖依赖项？

Question

我正在寻找一种方法来连接温莎城堡的解析过程，这样我就可以做类似的事情：

if (componentCanBeResolvedElsewhere)
{
    return elsewhere.Resolve<TService>();
}
else
{
    windsorContainer.Resolve<TService>();
}

我希望 Castle Windsor 处理我的大部分依赖项，但我想提供 'fill-in the blanks'.

的能力

我确信这可以做到，但我正在努力寻找示例。

Answer 1

看起来你是通过 Handler Selector.

Answer 2

您可以使用 dependency resolvers 来声明您有解决组件的特殊方法。这是我用来解析应用程序设置中的字符串的示例

public class AppSettingsResolver : ISubDependencyResolver
{
    public bool CanResolve(
                CreationContext context,
                ISubDependencyResolver contextHandlerResolver,
                ComponentModel model,
                DependencyModel dependency)
    {
        return !string.IsNullOrEmpty(ConfigurationManager.AppSettings[dependency.DependencyKey])
               &&
               TypeDescriptor.GetConverter(dependency.TargetType)
                .CanConvertFrom(typeof(string));
    }

    public object Resolve(
                    CreationContext context,
                    ISubDependencyResolver contextHandlerResolver,
                    ComponentModel model,
                    DependencyModel dependency)
    {
        return TypeDescriptor
            .GetConverter(dependency.TargetType)
            .ConvertFrom(ConfigurationManager.AppSettings[dependency.DependencyKey]);
    }
}

然后在您的城堡容器中注册解析器：

container.Kernel.Resolver.AddSubResolver(new AppSettingsResolver())

如何拦截 Castle Windsor 的组件解析以覆盖依赖项？

How do I intercept Castle Windsor's component resolution to override dependencies?

c#

dependency-injection

inversion-of-control

castle-windsor