ASP.NET Core 2.2-稍后在代碼中訪問StaticFileOption RequestPath

Question

在Startup.cs配置功能中，我這樣做：

        app.UseStaticFiles(new StaticFileOptions()
        {
            FileProvider = new PhysicalFileProvider(@"\\server\somepath\someimages"),
            RequestPath = "/images"
        });

稍后，在控制器中說，我不想硬編碼：

        string ImageImLookingFor = "/images" + foo.jpg;

相反，我想做類似的事情：

        string ImageImLookingFor = SomeObjectThatGivesMe.RequestPath + foo.jpg;

這可能嗎？

Answer 1

不能完全確定是否有可能，但是解決方法可以是appsettings鍵，並可以從兩個位置讀取它。

例如：在您的應用程序中

{
 "ImagesPath" : '/images"
}

在Starup.cs中

   app.UseStaticFiles(new StaticFileOptions()
    {
        FileProvider = new PhysicalFileProvider(@"\\server\somepath\someimages"),
        RequestPath = Configuration["ImagesPath"]
    });

在您的控制器中

    string ImageImLookingFor = configuration.RequestPath + foo.jpg;

您可以使配置文件成為強類型，然后將其替換為IOptions<ImageConfiguration> ，其中ImageConfiguration是具有ImagesPath屬性的類。

Answer 2

您可以嘗試使用services.Configure配置StaticFileOptions 。

public class Startup
{
    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.Configure<StaticFileOptions>(options => {
            options.FileProvider = new PhysicalFileProvider(@"xxx");
            options.RequestPath = "/images";
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {            
        app.UseStaticFiles(app.ApplicationServices.GetRequiredService<IOptions<StaticFileOptions>>().Value);            
    }
} 

然后像這樣通過IOptions<StaticFileOptions>訪問它

public class HomeController : Controller
{
    private readonly StaticFileOptions _options;
    public HomeController(IOptions<StaticFileOptions> options)
    {
        this.configuration = configuration;
        _serviceProvider = serviceProvider;
        _options = options.Value;
    }
    public IActionResult Index()
    {
        return Ok(_options.RequestPath);
    }        
}