ASP.Net Core, detecting debugging vs. not debugging in a controller

问题

I am writing my first ASP.Net code web app and in my controller I would like to have an if statement that checks to see if I am in debugging mode or not. I know in the Startup.cs file I can check env.IsDevelopment() but that is because the IHostingEnvironment is passed into it. I have not been able to find a way to check for this status inside a normal controller. Is there a way in ASP.Net Core to detect when I am in debug mode inside the controller that I am missing?

回答1:

You should be able to just inject IHostingEnvironment into your controller constructor.

protected readonly IHostingEnvironment HostingEnvironment;

public TestController(IConfiguration configuration, IHostingEnvironment hostingEnv){
    this.Configuration = configuration;
    this.HostingEnvironment = hostingEnv;
}

[HttpGet]
public IActionResult Test(){
    if(this.HostingEnvironment.IsDevelopment()){
        // Do something
    }

    return View();
}

回答2:

IHostingEnvironment lets you know the environment in which the application is running. Looks like what you need is the build configuration used to build the application i.e Debug/Release. In an ASP.NET Core web application, In order to get this information at compile time, there is no straight forward way, however you can have a property with conditional compilation using compiler directives, something like

public static bool IsDebug
{
  get
     {
      bool isDebug = false;
    #if DEBUG
       isDebug = true;
    #endif
       return isDebug;
      }
}

At runtime, you can check the value of IsDebug property to determine the build configuration. I would suggest to add this property to a common static or utility class which can be accessible from all your controllers.

来源：https://stackoverflow.com/questions/42776109/asp-net-core-detecting-debugging-vs-not-debugging-in-a-controller