.Net Core 读取配置文件

目录

• 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
  

1. {
2.   "Name": "刘德华",
3.   "Teacher": {
4.     "Name": "张无忌",
5.     "Age": "125"
6.   },
7.   "ReadConfigArray": [
8.     "ReadConfigArray_1",
9.     "ReadConfigArray_2",
10.     "ReadConfigArray_3"
11.   ],
12.   "TestObject": {
13.     "Name": "刘德华",
14.     "Teacher": {
15.       "Name": "张无忌",
16.       "Age": "125"
17.     },
18.     "ReadConfigArray": [
19.       "ReadConfigArray_1",
20.       "ReadConfigArray_2",
21.       "ReadConfigArray_3"
22.     ]
23.   }
24. }

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IConfiguration 读取

• 直接构造函数注入
  

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

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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
  

1. using NuGet.DependencyResolver;
3. namespace Entity
4. {
5.     public class ConfigTestObject
6.     {
7.         public string? Name { get; set; }
8.         public ConfigTestObjectTeacher? Teacher { get; set; }
9.         public List<string>? ReadConfigArray { get;set; }
10.     }
12.     public class ConfigTestObjectTeacher
13.     {
14.         public string? Name { get; set; }
15.         public int Age { get; set; }
16.     }
17. }

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1. ConfigTestObject configTestObject = new ConfigTestObject();
2. _configuration.Bind("TestObject", configTestObject);
4. Console.WriteLine("name: " + configTestObject.Name);
5. Console.WriteLine("Teacher:Name " + configTestObject.Teacher?.Name);
6. Console.WriteLine("Teacher:Age " + configTestObject.Teacher?.Age);
7. Console.WriteLine("ReadConfigArray:0 " + configTestObject.ReadConfigArray?[0]);
8. Console.WriteLine("ReadConfigArray:1 " + configTestObject.ReadConfigArray?[1]);
9. Console.WriteLine("ReadConfigArray:2 " + configTestObject.ReadConfigArray?[2]);

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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

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

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构造注入

1. ConfigTestObject _configTestObject1;
2. public TestIConfigurationController(IOptionsMonitor<ConfigTestObject> configTestObject)
3. {
4.     _configTestObject1 = configTestObject.CurrentValue;
5. }

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使用

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

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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

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

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构造注入

1. ConfigTestObject _configTestObject1;
2. public TestIConfigurationController(IOptions<ConfigTestObject> configTestObject)
3. {
4.     _configTestObject1 = configTestObject.Value;
5. }

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使用

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

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