转自：https://www.cnblogs.com/jiyuwu/p/11776044.html
第一种直接放到通用类库，那里想调往那调。
1.编辑我们的appsettings.json文件
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"ConnectionStrings": {
"TestConnection": "server=123;User ID=jiyuwu;Password=123456;database=jiyuwu;",
"Redis": "127.0.0.1:6379"
},
"AllowedHosts": "*"
}
2.通用类库Common添加引用类库Microsoft.Extensions.Configuration.Json并添加AppSettingsHelper.cs
Install-Package Microsoft.Extensions.Configuration.Json -Version 3.0.0
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.Json;
using System;
using System.Collections.Generic;
using System.Text;
namespace Common
{
public class AppSettingsHelper
{
public static IConfiguration Configuration { get; set; }
static AppSettingsHelper()
{
//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();
}
}
}
3.调用
string sqlString= AppSettingsHelper.Configuration.GetConnectionString("TestConnection");
string sqlString1 = AppSettingsHelper.Configuration["Logging:LogLevel:Default"];
第二种直接读文件调用。
1.引用类库并读取文件获取配置
Install-Package Microsoft.Extensions.Configuration.Json -Version 3.0.0
public IConfiguration Configuration;
public void TestAppSettings()
{
var builder = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
Configuration = builder.Build();
string sqlString2 = Configuration["Logging:LogLevel:Default"];
}
简单介绍下原理：
我们通过ConfigurationBuilder对象来创建ConfigurationRoot对象，并用其来读取配置。SetBasePath()方法是用来设置我们配置对象需要的配置文件的基础路径，比如我们将基础路径设置为C:\TemplateCore\TemplateCore，那么他读取我们的配置文件appsettings.json的路径将是C:\TemplateCore\TemplateCore\appsettings.json
开源地址：https://github.com/jiyuwu/TemplateCore
测试浏览效果：http://127.0.0.1:1994/home/TestAppSettings