一、Json配置文件
1、这里的配置文件指的是下图
2、json配置文件示例
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"Setting": {
"Url": "http://localhost:8080/",
"Name": "localhost"
}
}
二、读取配置文件的几种方式
1、方式一：直接读取
[ApiController]
[Route("[controller]/[action]")]
public class TestController: ControllerBase
{
public IConfiguration _configuration { get; set; }
public TestController(IConfiguration configuration)
{
_configuration = configuration;
}
/// <summary>
/// 方式一：直接读取单个值
/// </summary>
[HttpGet, HttpPost]
public void GetConfigDemo1()
{
var url = _configuration["Setting:Url"]; // http://localhost:8080/
var url2 = _configuration.GetValue<string>("Setting:Url"); // http://localhost:8080/
var url3 = _configuration.GetSection("Setting").GetSection("Url").Value; // http://localhost:8080/
}
}
2、方式二：读取Json对象
1）新建应用设置类AppSettings
/// <summary>
/// 应用设置类
/// 总类：对应json文件，确定json模块与对象
/// </summary>
public static class AppSettings
{
public static SettingClass settingClass { get; set; }
public static void Init(IConfiguration configuration)
{
// 将Setting模块绑定到Json模块的Setting类
settingClass = new SettingClass();
configuration.Bind("Setting", settingClass);
}
}
2）新建Json模块Setting类
/// <summary>
/// Json模块Setting类
/// </summary>
public class SettingClass
{
/// <summary>
/// 地址
/// </summary>
public string Url { get; set; }
/// <summary>
/// 名称
/// </summary>
public string Name { get; set; }
}
3）在Startup.cs中调用AppSettings的初始化方法
// AppSettings总类进行调用静态方法
AppSettings.Init(Configuration);
4）在控制器中使用
[ApiController]
[Route("[controller]/[action]")]
public class TestController: ControllerBase
{
public IConfiguration _configuration { get; set; }
public TestController(IConfiguration configuration)
{
_configuration = configuration;
}
/// <summary>
/// 方式二：读取Json对象 - 变成类使用
/// </summary>
[HttpGet, HttpPost]
public void GetConfigDemo2()
{
var url = AppSettings.settingClass.Url; // http://localhost:8080/
var name = AppSettings.settingClass.Name; // localhost
}
}
}
3、方式三：在注册服务中绑定实体类与Json文件，使用时声明为全局常量
1）在Startup.cs中将Json模块类与Json文件对应内容绑定（Json模块类如方式2的SettingClass类）
services.Configure<SettingClass> (option =>
{
option.Url = Configuration["Setting:Url"];
option.Name = Configuration["Setting:Name"];
});
2）在控制器中使用
[ApiController]
[Route("[controller]/[action]")]
public class TestController: ControllerBase
{
public IConfiguration _configuration { get; set; }
public string UrlStr { get; set; }
public string NameStr { get; set; }
public TestController(IConfiguration configuration, IOptions<SettingClass> settings)
{
_configuration = configuration;
UrlStr = settings.Value.Url;
NameStr = settings.Value.Name;
}
/// <summary>
/// 方法三：在注册服务的时候把配置文件与类绑定好值，使用时声明为全局常量
/// </summary>
[HttpGet, HttpPost]
public void GetConfigDemo3()
{
var url = UrlStr; // http://localhost:8080/
var name = NameStr; // localhost
}
}
