1.在appsetting下新增一个配置节点：
"KeyStrings": {
"key": "abc",
"value": "test"
},
2.新增类文件 KeyStrings.cs
public class KeyStrings{
public string key{get;set}
public string value{get;set;}
}
3.添加读取配置文件的类及接口文件KeyReposiroty.cs,IKeyRepository.cs
public class KeyReposiroty:IKeyReposiroty
{
protected readonly KeyStrings _keystrings;
public KeyReposiroty(IOptions<KeyStrings> keystrings){
_keystrings=keystrings
}
public virtual KeyStrings MyKeyStrings
{
get
{
return _keystrings;
}
}
}
public interface IKeyReposiroty
{
KeyStrings MyKeyStrings{get;}
}
4.新增扩展方法
public static IServiceCollection GetKeyString(this IServiceCollection services, IConfigurationSection configuration)
{
services.Configure<KeyStrings>(configuration);
services.AddSingleton<IKeyRepository,KeyRepository>(); //无接口的时候进行类的注入：services.AddSingleton<KeyRepository>();
return services;
}
5.在Startup中调用扩展方法进行依赖注入
public void ConfigureServices(IServiceCollection services)
{
services.GetKeyString(Configuration.GetSection("KeyStrings"));
}
6.现在通过IkeyRepository的MyKeyStrings就能访问到配置文件中配置节点的信息
原文：http://www.cnblogs.com/huanglin101/p/6509124.html