带有列表的 asp.net 核心 ioptions

Posted 2023-04-12

【中文标题】带有列表的 asp.net 核心 ioptions

【英文标题】：asp.net core ioptions with a list

【发布时间】：2017-08-01 06:11:20

【问题描述】：

我正在尝试从appsettings.json 文件中读取值列表。我可以毫无问题地读取Logging 值，但列表值（即Servers）为空：

appsettings.json：

 "Logging": 
      "IncludeScopes": false,
      "LogLevel": 
           "Default": "Debug",
           "System": "Information",
           "Microsoft": "Information"
      
 ,
 "Servers": [
      "SCHVW2K12R2-DB",
      "SCHVW2K12R2-DB\\MSSQL2016",
      "SCHVW2K8R2-DB"
    ]

对象类：

public class AppSettingsConfiguration

    public Logging Logging  get; set; 
    public Servers Servers  get; set; 


//Logging Objects
public class Logging

    public bool IncludeScopes  get; set; 
    public LogLevel LogLevel  get; set; 

public class LogLevel

    public string Default  get; set; 
    public string System  get; set; 
    public string Microsoft  get; set; 


//Server Objects
public class Servers

    public List<string> Names  get; set; 

【参考方案1】：

尝试删除Servers 类并将AppSettingsConfiguration 更改为：

public class AppSettingsConfiguration

    public Logging Logging  get; set; 
    public string[] Servers  get; set; 

Servers 是一个简单的字符串数组，不是复杂类型。

【讨论】：

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【参考方案2】：

要使用你原来的类，你可以把你的 json 改成这个。 IMO，这更具可读性。

     "Logging": 
          "IncludeScopes": false,
          "LogLevel": 
               "Default": "Debug",
               "System": "Information",
               "Microsoft": "Information"
          
     ,
     "Servers": 
        "Names": [
          "SCHVW2K12R2-DB",
          "SCHVW2K12R2-DB\\MSSQL2016",
          "SCHVW2K8R2-DB"
        ]