1、添加 NuGet 包
Microsoft.Extensions.Configuration
2、通过注入获取 Configuration
注意：注入获取的必须提前在 StartUp 里面提前注册
public class Startup { public IConfiguration Configuration { get; } public StartupAutofacIdp(IConfiguration configuration, IHostingEnvironment env) { Configuration = configuration; } public void ConfigureServices(IServiceCollection services) { //TestConfig 对应json文件 的节点 services.Configure<TestConfig>(Configuration.GetSection("ConnectionStrings")); } } public class TestConfig { public string Default { get; set; } public string Line { get; set; } } appsetting.json { "ConnectionStrings": { "Default": "Data Source=.; Initial Catalog=xiaoer; User Id=sa; Password=123456;", "Line": "Data Source=.; Initial Catalog=xiaoer; User Id=sa; Password=1234567890;" }, "Logging": { "LogLevel": { "Default": "Warning" } }, "AllowedHosts": "*" }
public class HomeController : Controller { private TestConfig testConfig; public IConfiguration Configuration; public HomeController(IOptions<TestConfig> options, IConfiguration configuration) { testConfig = options.Value; Configuration = configuration; } public IActionResult Index() { /* * 2种方式 * 1、通过 StartUp 提前注册实体类访问 * 2、使用 Configuration 实例访问 */ TestConfig test = new TestConfig(); Configuration.GetSection("ConnectionStrings").Bind(test); ViewBag.Test = test; return View(testConfig); } }
3、通过加载对应的文件绑定 Configuration 实例
public class Config
{
/// <summary>
/// appsettings.json 文件 也可以是任何自定义的 json 文件
/// </summary>
private static IConfiguration Configuration;
static Config()
{
if (Configuration == null)
{
var builder = new ConfigurationBuilder();
builder.SetBasePath(Directory.GetCurrentDirectory());
builder.AddJsonFile("appsettings.json", false, true);
Configuration = builder.Build();
}
}
}