（十二）Bind读取配置到C#实例

标签：service   col   style   ogr   依赖   pre   settings   add   mic   

• 继续上一节的，接下来用Options或者Bind把json文件里的配置转成C#的实体，相互之间映射起来。首先新建一个asp.net core mvc项目OptionsBindSample
• Startup.cs，这里用依赖注入把Configuration加进来

• 1         public IConfiguration Configuration { get; set; }
  2 
  3         public Startup(IConfiguration configuration)
  4         {
  5             this.Configuration = configuration;
  6         }

   

• 再建立一个Class.cs

•  1 public class Class
   2         {
   3             public int ClassNo { get; set; }
   4             public string ClassDesc { get; set; }
   5             public List<Student> Students { get; set; }
   6         }
   7 
   8         public class Student
   9         {
  10             public string Name { get; set; }
  11             public string Age { get; set; }
  12         }

   

• 再建一个appsettings.json(名称一定要叫这个，因为在Program.cs中WebHost.CreateDefaultBuilder(args)会默认读取appsettings.json文件)

•  1 {
   2   "ClassNo": "1",
   3   "ClassDesc": "ASP.NET Core 101",
   4   "Students": [
   5     {
   6       "name": "liuxh",
   7       "age": "31"
   8     },
   9     {
  10       "name": "linhj",
  11       "age": "31"
  12     },
  13     {
  14       "name": "liuxy",
  15       "age": "7"
  16 
  17 
  18 
  19     },
  20     {
  21       "name": "liuss",
  22       "age": "1"
  23     }
  24   ]
  25 
  26 }

   

• 最后Starup.cs代码是这样的

•         public IConfiguration Configuration { get; set; }
  
          public Startup(IConfiguration configuration)
          {
              this.Configuration = configuration;
          }
  
          // This method gets called by the runtime. Use this method to add services to the container.
          // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
          public void ConfigureServices(IServiceCollection services)
          {
              
          }
  
          // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
          public void Configure(IApplicationBuilder app, IHostingEnvironment env)
          {
              if (env.IsDevelopment())
              {
                  app.UseDeveloperExceptionPage();
              }
  
              
              app.Run(async (context) =>
              {
                  var myClass = new Class();
                  Configuration.Bind(myClass);//把配置文件的信息和对象映射起来
  
                  await context.Response.WriteAsync($"ClassNo:{myClass.ClassNo}");
                  await context.Response.WriteAsync($"ClassDesc:{myClass.ClassDesc}");
                  await context.Response.WriteAsync($"{myClass.Students.Count} Students");
  
              }); 
          }

   

• 最后启动网站

（十二）Bind读取配置到C#实例

标签：service   col   style   ogr   依赖   pre   settings   add   mic   

原文地址：https://www.cnblogs.com/dotnetHui/p/9058102.html