我们如何解决配置文件设置的依赖性

Question

我是依赖注入解析器技术主题的新手。我可以知道如何通过配置文件部分解决依赖关系。下面是我的类和接口以及配置文件。

我确信错过了部分代码/设置。你能帮我解决这个问题吗？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace UnityConfiguration_Testing
{
    public interface IUserAuthentication
    {
        string Authenticate(string username, string password);
        string GetUserRole(string username);
    }
}

public class CloudAppAuthetication: IUserAuthentication
{
    public string Authenticate(string username, string password)
    {
        return "This Authenticate method executed from cloud class";//Jwt token based authentication logic should be there
    }

    public string GetUserRole(string username)
    {
        return "This GetUserRole method executed from cloud class";//New logic to user management api call
    }
}

public class StandaloneAppAuthetication : IUserAuthentication
{
      public string Authenticate(string username, string password)
      {
          return "This Authenticate method executed from standalone class";//current logic should be here
      }

      public string GetUserRole(string username)
      {
           return "This GetUserRole method executed from standalone class";//current logic should be here
      }
  }

控制台应用程序调用接口方法：

using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace UnityConfiguration_Testing
{
    class Program
    {
        static void Main(string[] args)
        {
            IUnityContainer container = new UnityContainer();
            container.LoadConfiguration("TestContainer");
            IUserAuthentication _userAuthentication = null;
            string validatedUser = _userAuthentication.Authenticate("[email protected]", "testpassword");
            string validatedUserRole = _userAuthentication.GetUserRole("[email protected]");
        }
    }
}

我的控制台应用程序的App.config文件是：

  <?xml version="1.0" encoding="utf-8"?>
  <configuration>
    <configSections>
       <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration" />
    </configSections>
    <unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
      <container name="TestContainer">
        <register type="UnityConfiguration_Testing.IUserAuthentication,UnityConfiguration_Testing" mapTo="UnityConfiguration_Testing.StandaloneAppAuthetication,UnityConfiguration_Testing" />
      </container>
    </unity>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>

Answer 1

Inversion Of Control contener就是你想拥有的。有许多。例如Autofac。他们可以根据配置文件中的配置注册接口实现，也可以在运行时配置它。

Answer 2

如果我正确地理解了这个问题，那么这大致是你正在寻找的。

using System;
using System.Reflection;

public class Program
{
    public static void Main()
    {
        Type t = Type.GetType("Second"); //get class name from config here
         MethodInfo method 
             = t.GetMethod("Hello", BindingFlags.Static | BindingFlags.Public); // get method by name here

        Console.WriteLine(method.Invoke(null,null));
    }
}

public static class First
{
    public static string Hello(){
    return "hello"; 
    }
}
public static class Second 
{
    public static string Hello(){
    return "Hello World";   
    }
}

这将允许您获取可以从配置文件中获取的名称定义的类和方法。