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
对于blazor服务器应用程序，我这样做:Startup.cs直接在命名空间声明add
namespace myProjectName.Server
public static class myGlobals
{
public static bool isDevelopment = true;
}
Startup.cs找到Configure方法和env. cs的现有检查。并将上面声明的静态IsDevelopment设置为true或false。
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
myGlobals.isDevelopment = true;
}
else false
在ApplicationUser中初始化数据库连接或其他任何地方
if (myGlobals.isDevelopment)
{
其他回答
对于blazor服务器应用程序，我这样做:Startup.cs直接在命名空间声明add
namespace myProjectName.Server
public static class myGlobals
{
public static bool isDevelopment = true;
}
Startup.cs找到Configure方法和env. cs的现有检查。并将上面声明的静态IsDevelopment设置为true或false。
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
myGlobals.isDevelopment = true;
}
else false
在ApplicationUser中初始化数据库连接或其他任何地方
if (myGlobals.isDevelopment)
{
从ASP开始。NET Core 3.0中，从ConfigureServices和Configure中访问环境变量要简单得多。
只需将IWebHostEnvironment注入到启动构造函数本身。像这样…
public class Startup
{
public Startup(IConfiguration configuration, IWebHostEnvironment env)
{
Configuration = configuration;
_env = env;
}
public IConfiguration Configuration { get; }
private readonly IWebHostEnvironment _env;
public void ConfigureServices(IServiceCollection services)
{
if (_env.IsDevelopment())
{
//development
}
}
public void Configure(IApplicationBuilder app)
{
if (_env.IsDevelopment())
{
//development
}
}
}
参考:https://learn.microsoft.com/en - us/aspnet/core/fundamentals/environments?view=aspnetcore - 3.0 # inject-iwebhostenvironment-into-the-startup-class
我想在我的服务中加入这种环境。这真的很容易做到!我只是像这样把它注入到构造函数中:
private readonly IHostingEnvironment _hostingEnvironment;
public MyEmailService(IHostingEnvironment hostingEnvironment)
{
_hostingEnvironment = hostingEnvironment;
}
现在在稍后的代码中，我可以这样做:
if (_hostingEnvironment.IsProduction()) {
// really send the email.
}
else {
// send the email to the test queue.
}
编辑:
上面的代码是用于。net Core 2的。对于版本3，您将使用IWebHostEnvironment。
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
}
...
}
宿主环境来自ASPNET_ENV环境变量，在启动过程中使用IHostingEnvironment可用。IsEnvironment扩展方法，或IsDevelopment或IsProduction中相应的方便方法之一。在Startup()中保存你需要的东西，或者在ConfigureServices调用中保存:
var foo = Environment.GetEnvironmentVariable("ASPNET_ENV");
