.net core 学习笔记（5）-配置文件读取

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