.Net Core 读取配置文件

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appsetting.json
IConfiguration 读取
IConfiguration Bind 读取
IOptionsMonitor 读取
- Program.cs
- 构造注入
- 使用
IOptions 读取
- Program.cs
- 构造注入
- 使用

appsetting.json

用于测试appsetting.json


{
  "Name": "刘德华",
  "Teacher": {
    "Name": "张无忌",
    "Age": "125"
  },
  "ReadConfigArray": [
    "ReadConfigArray_1",
    "ReadConfigArray_2",
    "ReadConfigArray_3"
  ],
  "TestObject": {
    "Name": "刘德华",
    "Teacher": {
      "Name": "张无忌",
      "Age": "125"
    },
    "ReadConfigArray": [
      "ReadConfigArray_1",
      "ReadConfigArray_2",
      "ReadConfigArray_3"
    ]
  }
}

IConfiguration 读取

直接构造函数注入

Console.WriteLine("name: "+_configuration["Name"]);
Console.WriteLine("Teacher:Name " + _configuration["Teacher:Name"]);
Console.WriteLine("Teacher:Age " + _configuration["Teacher:Age"]);
Console.WriteLine("ReadConfigArray:0 " + _configuration["ReadConfigArray:0"]);
Console.WriteLine("ReadConfigArray:1 " + _configuration["ReadConfigArray:1"]);
Console.WriteLine("ReadConfigArray:2 " + _configuration["ReadConfigArray:2"]);

IConfiguration Bind 读取

使用Bind方法与对象绑定,然后操作对象即可,

注意: 对象属性与配置文件节点相同

using NuGet.DependencyResolver;

namespace Entity
{
    public class ConfigTestObject
    {
        public string? Name { get; set; }
        public ConfigTestObjectTeacher? Teacher { get; set; }
        public List<string>? ReadConfigArray { get;set; }
    }

    public class ConfigTestObjectTeacher
    {
        public string? Name { get; set; }
        public int Age { get; set; }
    }
}

ConfigTestObject configTestObject = new ConfigTestObject();
_configuration.Bind("TestObject", configTestObject);

Console.WriteLine("name: " + configTestObject.Name);
Console.WriteLine("Teacher:Name " + configTestObject.Teacher?.Name);
Console.WriteLine("Teacher:Age " + configTestObject.Teacher?.Age);
Console.WriteLine("ReadConfigArray:0 " + configTestObject.ReadConfigArray?[0]);
Console.WriteLine("ReadConfigArray:1 " + configTestObject.ReadConfigArray?[1]);
Console.WriteLine("ReadConfigArray:2 " + configTestObject.ReadConfigArray?[2]);

IOptionsMonitor 读取

Program.cs 读取要读取的节点
然后在使用的地方构造函数注入IOptionsMonitor 进来使用
configTestObject.CurrentValue 取出对象

Program.cs

builder.Services.Configure<ConfigTestObject>(builder.Configuration.GetSection("TestObject"));

构造注入


ConfigTestObject _configTestObject1;
public TestIConfigurationController(IOptionsMonitor<ConfigTestObject> configTestObject) 
{
    _configTestObject1 = configTestObject.CurrentValue;
}

使用

Console.WriteLine("TestIOptionsMonitor...");
Console.WriteLine("name: " + _configTestObject1.Name);
Console.WriteLine("Teacher:Name " + _configTestObject1.Teacher?.Name);
Console.WriteLine("Teacher:Age " + _configTestObject1.Teacher?.Age);
Console.WriteLine("ReadConfigArray:0 " + _configTestObject1.ReadConfigArray?[0]);
Console.WriteLine("ReadConfigArray:1 " + _configTestObject1.ReadConfigArray?[1]);
Console.WriteLine("ReadConfigArray:2 " + _configTestObject1.ReadConfigArray?[2]);

IOptions 读取

Program.cs 读取要读取的节点
然后在使用的地方构造函数注入IOptionsMonitor 进来使用
configTestObject.CurrentValue 取出对象

Program.cs

builder.Services.Configure<ConfigTestObject>(builder.Configuration.GetSection("TestObject"));

构造注入


ConfigTestObject _configTestObject1;
public TestIConfigurationController(IOptions<ConfigTestObject> configTestObject) 
{
    _configTestObject1 = configTestObject.Value;
}

使用

Console.WriteLine("TestIOptionsMonitor...");
Console.WriteLine("name: " + _configTestObject1.Name);
Console.WriteLine("Teacher:Name " + _configTestObject1.Teacher?.Name);
Console.WriteLine("Teacher:Age " + _configTestObject1.Teacher?.Age);
Console.WriteLine("ReadConfigArray:0 " + _configTestObject1.ReadConfigArray?[0]);
Console.WriteLine("ReadConfigArray:1 " + _configTestObject1.ReadConfigArray?[1]);
Console.WriteLine("ReadConfigArray:2 " + _configTestObject1.ReadConfigArray?[2]);

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