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.NET6之MiniAPI(四)：配置

2022-07-19 22:17:00 【51CTO】

　　配置文件，是一个每个应用服务程序常用的功能，从原来的终端应用时代，到现在的元宇宙时代，配置都是很悠然自得的存在。asp.net core提供了强大的配置文件访问机制，不管是MVC API还是MiniAPI，使用方式都是相同的。

　　框架默认的配置文件是：appsettings.json，可以以json的格式存放自己复杂的配置:

       
       {
       
  "Logging": {
       
    "LogLevel": {
       
      "Default": "Information",
       
      "Microsoft.AspNetCore": "Warning"
       
    }
       
  },
       
  "AllowedHosts": "*",
       
  "ConnectionStrings": {
       
    "ExamDatabase": "server=.;database=Exam;uid=sa;pwd=sa;"
       
  },
       
  "AppInfo": {
       
    "Name": "Mini & Powerful",
       
    "Version": "v1.0.0",
       
    "Author": {
       
      "Architect": "桂素伟-A",
       
      "Programmer": "桂素伟-P",
       
      "Designer": "桂素伟-D"
       
    },
       
    "Features": [ "Learn MiniAPI", "Architect Element" ]
       
  }
       
}
      
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简单取值

       
       var architect = builder.Configuration.GetSection("AppInfo:Author:Architect").Value;
       
var features1=builder.Configuration.GetSection("AppInfo:Features:1").Value;
      
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用record绑定

record

       
       public record AppInfoRecord(string? Name, string? Version, AuthorRecord? Author, string[]? Features);
       
public record AuthorRecord(string? Architect, string? Programmer, string? Designer);
      
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绑定

       
       var authorRecord = new AuthorRecord(null, null, null);
       
var appInfoRecord = new AppInfoRecord(null, null, authorRecord, null);
       
builder.Configuration.GetSection("AppInfo").Bind(appInfoRecord);
      
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结果

.NET6之MiniAPI(四)：配置_ico

用class绑定
class

       
       public class AppInfo
       
{
       
    public string? Name { get; set; }
       
    public string? Version { get; set; }
       
    public Author? Author { get; set; }
       
    public string[]? Features { get; set; }
       
}
       
public class Author
       
{
       
    public string? Architect { get; set; }
       
    public string? Programmer { get; set; }
       
    public string? Designer { get; set; }
       
}
      
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绑定

       
       var appInfo = new AppInfo();
       
builder.Configuration.GetSection("AppInfo").Bind(appInfo);
      
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结果

.NET6之MiniAPI(四)：配置_配置文件_02

　　用record和class绑定各有优势，record定义的时间代码简单，绑定要复杂一些，class正好相反，定义要复杂一些，绑定时简单。

从IConfiguration中获取配置

可以在路由方法中获取配置信息

       
       app.MapGet("/getappinfo", (IConfiguration config) =>
       
{
       
    return config.GetSection("AppInfo:Name").Value;
       
});
      
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从路由中取配置文件
首选注入

       
       var authorRecord = new AuthorRecord(null, null, null);
       
var appInfoRecord = new AppInfoRecord(null, null, authorRecord, null);
       
builder.Configuration.GetSection("AppInfo").Bind(appInfoRecord);
       
builder.Services.AddSingleton(appInfoRecord);
      
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取配置数据

       
       app.MapGet("/appinfo", (AppInfoRecord appinfo) =>
       
{
       
    return appinfo;
       
});
      
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结果

.NET6之MiniAPI(四)：配置_ico_03

读取其他格式的配置文件
myconfig.ini

       
       [iniconfig]
       
key1=value1
       
key2=value2
      
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加载配置文件，并取值

       
       builder.Host.ConfigureAppConfiguration((hostingContext, config) =>
       
{
       
    config.AddIniFile("myconfig.ini",
       
                       optional: true,
       
                       reloadOnChange: true);
       
});
       
var key1=builder.Configuration.GetSection("iniconfig:key1").Value;
      
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版权声明
本文为[51CTO]所创，转载请带上原文链接，感谢
https://blog.51cto.com/axzxs/5487608

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