appsettings.json，给类库项目引入 Microsoft.Extensions.Configuration 和 Microsoft.Extensions.Configuration.Json程序包，类库中加载appsettings.json配置文件代码如下：
{
"ConnectionStrings": {
"conn": "Server=192.168.10.254;port=3308;database=riyunping_qdezge20180225;uid=root;pwd=123456;"
},
"AppSettings": {
"AccessKey": "111111",
"SecretKey": "22222",
"Bucket": "3333333",
"Domain": "http://wwww.domain.com"
},
"Logging": {
"IncludeScopes": false,
"LogLevel": {
"Default": "Warning"
}
},
"wmUrl": "https://www.baidu.com"
}
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.Json;
using System;
using System.Collections.Generic;
using System.Text;
namespace Infrastructure
{
/// <summary>
/// 读取配置文件
/// </summary>
public class AppConfigurtaionServices
{
public static IConfiguration Configuration { get; set; }
static AppConfigurtaionServices()
{
//ReloadOnChange = true 当appsettings.json被修改时重新加载
Configuration = new ConfigurationBuilder()
.Add(new JsonConfigurationSource { Path = "appsettings.json", ReloadOnChange = true })
.Build();
}
}
}
使用方法如下，读取数据库链接字符串
AppConfigurtaionServices.Configuration.GetConnectionString("conn");
//得Server=Server=192.168.10.254;port=3308;database=abc;uid=root;pwd=123456;
读取一级配置节点配置
AppConfigurtaionServices.Configuration["wmUrl"]; //得 https://www.baidu.com
读取二级子节点配置
AppConfigurtaionServices.Configuration["Appsettings:AccessKey"]; //得到 111111 AppConfigurtaionServices.Configuration["Appsettings:SecretKey"]; //得到 22222
注意，如果AppConfigurtaionServices类中抛出FileNotFoundException异常，说明目录下未找到appsettings.json文件，这时请在项目appsettings.json文件上右键——属性——将“复制到输出目录”项的值改为“始终复制”即可。