WebAPI学习(四)：appsettings.json读取帮助类

在Webapi中，我们会把配置信息统一放在appsettings.json中，通过新建读取帮助类，更加简单的读取配置！

1. 新建公共类库TEST.Common

   

2. 新增引用 点击引用 -> 右键 -> 管理Nuget程序包

   

3. 项目新建Helper文件夹，新建AppSettings.cs

   /// <summary>
   /// Appsettings.json操作类
   /// </summary>
   public class AppSettings
   {
       public static IConfiguration Configuration { get; set; }
       public static string contentPaht {  get; set; } 
   
       /// <summary>
       /// 构造函数
       /// </summary>
       public AppSettings(string contentPath) 
       {
           var Path = "appsettings.json";
   
           Configuration = new ConfigurationBuilder()
               .SetBasePath(contentPath)
               .Add(new JsonConfigurationSource
               {
                   Path = Path,
                   Optional = false,
                   ReloadOnChange = true
               }).Build();
       }
   
       /// <summary>
       /// 构造函数
       /// </summary>
       /// <param name="configuration"></param>
       public AppSettings(IConfiguration configuration) 
       {
           Configuration = configuration;
       }
   
       /// <summary>
       /// 封装要操作的字符
       /// </summary>
       /// <param name="sections">节点配置</param>
       /// <returns></returns>
       public static string App(params string[] sections)
       {
           try
           {
               if (sections.Any())
               {
                   return Configuration[string.Join(":", sections)];
               }
           }
           catch (Exception)
           { }
   
           return "";
       }
   
       /// <summary>
       /// 递归获取配置信息数组
       /// </summary>
       /// <typeparam name="T"></typeparam>
       /// <param name="sections"></param>
       /// <returns></returns>
       public static List<T> App<T>(params string[] sections)
       {
           var list = new List<T>();
           Configuration.Bind(string.Join(":", sections), list);
           return list;
       }
   
   }

4. 引用TEST.Common

   

5. 在Program.cs中添加引用

   //注册appsettings读取类
   builder.Services.AddSingleton(new AppSettings(builder.Configuration));

6.