如何从配置文件加载统一设置？ [英] How to load unity settings from config file?

问题描述

我有一个 unity 配置文件（ App.config ），如下所示：

I have an unity configuration file(App.config) as below:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration"/>
  </configSections>
  <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
    <alias alias="IProductService" type="UnityExample.Service.IProductService, UnityExample.Service" />
    <containers>
      <container name="Service">
        <register type="IProductService" mapTo="ProductService"/>
      </container>
    </containers>
  </unity>
</configuration>

现在我要 load 从上方文件。

var container = new UnityContainer().LoadConfiguration("Service");

但是我收到以下错误：

[ArgumentNullException：值不能为null。参数名称：section]
Microsoft.Practices.Unity.Configuration.UnityContainerExtensions.LoadConfiguration（IUnityContainer
container，UnityConfigurationSection section，String containerName）

[ArgumentNullException: Value cannot be null. Parameter name: section] Microsoft.Practices.Unity.Configuration.UnityContainerExtensions.LoadConfiguration(IUnityContainer container, UnityConfigurationSection section, String containerName)

推荐答案

我能够使其正常运行。我已经使用与您使用的相同名称空间创建了一个演示控制台应用程序，如下所示：

I was able to make it work. I have created a demo console application using the same namespaces you're using, as follows:

已安装大量软件包：

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Unity" version="5.8.6" targetFramework="net461" />
  <package id="Unity.Abstractions" version="3.3.0" targetFramework="net461" />
  <package id="Unity.Configuration" version="5.2.3" targetFramework="net461" />
</packages>

App.Config：

App.Config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <configSections>
        <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration"/>
    </configSections>

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

        <containers>
            <container name="Service">
                <register type="IProductService" mapTo="ProductService"/>
            </container>
        </containers>
    </unity>

    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
    </startup>
    <runtime>
        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <assemblyIdentity name="Unity.Configuration" publicKeyToken="6d32ff45e0ccc69f" culture="neutral" />
                <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
            </dependentAssembly>
        </assemblyBinding>
    </runtime>
</configuration>

代码：

namespace UnityExample.Service
{
    public interface IProductService
    {

    }

    public class ProductService : IProductService
    {
    }
}

Main：

using System.Configuration;
using Microsoft.Practices.Unity.Configuration;

using Unity;
using UnityExample.Service;

namespace UnityExample
{
    class Program
    {
        static void Main(string[] args)
        {
            var container = new UnityContainer();
            UnityConfigurationSection section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity");
            section.Configure(container, "Service");

            IProductService service = container.Resolve<IProductService>();
        }
    }
}

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