所以自己动手写了一个工具类
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;
using System;
namespace Common
{
public class ConfigurationHelper
{
public IConfiguration config { get; set; }
public ConfigurationHelper()
{
IHostingEnvironment env = MyServiceProvider.ServiceProvider.GetRequiredService<IHostingEnvironment>();
config = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
.AddEnvironmentVariables()
.Build();
}
public T GetAppSettings<T>(string key) where T : class, new()
{
var appconfig = new ServiceCollection()
.AddOptions()
.Configure<T>(config.GetSection(key))
.BuildServiceProvider()
.GetService<IOptions<T>>()
.Value;
return appconfig;
}
}
//我比较喜欢单独放这个类,但是这样放更明显
public class MyServiceProvider
{
public static IServiceProvider ServiceProvider { get; set; }
}
}
使用这个类的话需要在StartUp的Configure中添加
MyServiceProvider.ServiceProvider = app.ApplicationServices;
然后就可以在任何地方使用此类读取配置文件信息了,而且由于ConfigurationHelper初始化时已经默认加载环境变量,所以同时具备多环境功能。
string path = new ConfigurationHelper().config["RedisPath"];
SettingPath pathss = new ConfigurationHelper().GetAppSettings<SettingPath>("SettingPath");
参考
https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/configuration/?view=aspnetcore-2.1 https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/environments?view=aspnetcore-2.1 https://www.jb51.net/article/125674.htm总结
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