如何在启动中的ConfigureServices方法中获得开发/登台/生产托管环境?
public void ConfigureServices(IServiceCollection services)
{
// Which environment are we running under?
}
ConfigureServices方法只接受一个IServiceCollection参数。
如何在启动中的ConfigureServices方法中获得开发/登台/生产托管环境?
public void ConfigureServices(IServiceCollection services)
{
// Which environment are we running under?
}
ConfigureServices方法只接受一个IServiceCollection参数。
当前回答
如果你需要在你的代码库中某个不容易访问IHostingEnvironment的地方测试这个,另一个简单的方法是这样做的:
bool isDevelopment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") == "Development";
其他回答
在. net Core 2.0 MVC app / Microsoft.AspNetCore.All v2.0.0中,你可以有@vaindil所描述的特定于环境的启动类,但我不喜欢这种方法。
你也可以在StartUp构造函数中注入IHostingEnvironment。不需要将环境变量存储在Program类中。
public class Startup
{
private readonly IHostingEnvironment _currentEnvironment;
public IConfiguration Configuration { get; private set; }
public Startup(IConfiguration configuration, IHostingEnvironment env)
{
_currentEnvironment = env;
Configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
......
services.AddMvc(config =>
{
// Requiring authenticated users on the site globally
var policy = new AuthorizationPolicyBuilder()
.RequireAuthenticatedUser()
.Build();
config.Filters.Add(new AuthorizeFilter(policy));
// Validate anti-forgery token globally
config.Filters.Add(new AutoValidateAntiforgeryTokenAttribute());
// If it's Production, enable HTTPS
if (_currentEnvironment.IsProduction()) // <------
{
config.Filters.Add(new RequireHttpsAttribute());
}
});
......
}
}
由于还没有完整的复制和粘贴解决方案,基于Joe Audette的回答:
public IWebHostEnvironment Environment { get; }
public Startup(IWebHostEnvironment environment, IConfiguration configuration)
{
Environment = environment;
...
}
public void ConfigureServices(IServiceCollection services)
{
if (Environment.IsDevelopment())
{
// Do something
}else{
// Do something
}
...
}
如果你需要在你的代码库中某个不容易访问IHostingEnvironment的地方测试这个,另一个简单的方法是这样做的:
bool isDevelopment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") == "Development";
以防有人也在看这个。在.net core 3+中,这些都已经过时了。更新方式为:
public void Configure(
IApplicationBuilder app,
IWebHostEnvironment env,
ILogger<Startup> logger)
{
if (env.EnvironmentName == Environments.Development)
{
// logger.LogInformation("In Development environment");
}
}
在Dotnet Core 2.0中,启动构造函数只需要一个iconfigure -parameter。
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
如何了解那里的托管环境? 我将它存储在ConfigureAppConfiguration期间的Program-class中 (使用完整的BuildWebHost而不是WebHost.CreateDefaultBuilder):
public class Program
{
public static IHostingEnvironment HostingEnvironment { get; set; }
public static void Main(string[] args)
{
// Build web host
var host = BuildWebHost(args);
host.Run();
}
public static IWebHost BuildWebHost(string[] args)
{
return new WebHostBuilder()
.UseConfiguration(new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("hosting.json", optional: true)
.Build()
)
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.ConfigureAppConfiguration((hostingContext, config) =>
{
var env = hostingContext.HostingEnvironment;
// Assigning the environment for use in ConfigureServices
HostingEnvironment = env; // <---
config
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true);
if (env.IsDevelopment())
{
var appAssembly = Assembly.Load(new AssemblyName(env.ApplicationName));
if (appAssembly != null)
{
config.AddUserSecrets(appAssembly, optional: true);
}
}
config.AddEnvironmentVariables();
if (args != null)
{
config.AddCommandLine(args);
}
})
.ConfigureLogging((hostingContext, builder) =>
{
builder.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
builder.AddConsole();
builder.AddDebug();
})
.UseIISIntegration()
.UseDefaultServiceProvider((context, options) =>
{
options.ValidateScopes = context.HostingEnvironment.IsDevelopment();
})
.UseStartup<Startup>()
.Build();
}
Ant然后像这样在ConfigureServices中读取它:
public IServiceProvider ConfigureServices(IServiceCollection services)
{
var isDevelopment = Program.HostingEnvironment.IsDevelopment();
}