秋天到了，大榕树结了又黑又小的果子，风一吹，果子掉下来了，就成了我们天然的玩具。
1. 说明
默认情况下读取配置Configuration的默认优先级：ConfigureAppConfiguration(自定义读取)>CommandLine(命令行参数)>Environment(环境变量)>appsetting.json(默认配置文件)>UseSetting的顺序
原因：读取配置的顺序是后来者居上模式，后来注册的会优先被读取到。
2. 获取配置
2.1 获取单个项
//值是数组
var a0 = Configuration.GetSection("RabbitMQ:Hosts").Get<string[]>();
//获取数组第一个
var a0 = Configuration["RabbitMQ:Hosts:0"];
//值是int类型
var a1 = Configuration.GetValue<int>("RabbitMQ:Port");
//值是字符串
var a2 = Configuration.GetValue<string>("RabbitMQ:UserName");
var a2 = Configuration["RabbitMQ:UserName"];
2.2 映射项到模型类
模型类
public class RabbitMQConfig
{
public const string RabbitMQ = "RabbitMQ";
public string[] Hosts { get; set; }
public int Port { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public string VirtualHost { get; set; }
}
appsettings
"RabbitMQ": {
"Hosts": [ "xxx.xxx.xxx.xxx" ],
"Port": 5672,
"UserName": "admin",
"Password": "xxxxxx",
"VirtualHost": "myQueue"
}
2.2.1 注入模型类
//startup配置
services.Configure<RabbitMQConfig>(Configuration.GetSection(RabbitMQConfig.RabbitMQ));
//获取数据
private readonly RabbitMQConfig _rabbitMQConfig;
public WeatherForecastController(IOptions<RabbitMQConfig> options)
{
_rabbitMQConfig = options.Value;
}
2.2.2 映射项到模型类
var info = new RabbitMQConfig(); Configuration.Bind(RabbitMQConfig.RabbitMQ, info); //or Configuration.GetSection(RabbitMQConfig.RabbitMQ).Bind(info);
到此这篇关于.NET Core读取配置文件的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持。
