从 ASP.NET 5 控制器 VS 2015 获取 wwwroot 文件夹路径

问题描述

很抱歉提出一个菜鸟问题，但我似乎无法从 Controller 获取 Server.MapPath.我需要从 wwwroot 的图像文件夹中输出 json 文件列表.它们位于 wwwroot/images.如何获得可靠的 wwwroot 路径?

Sorry for a noob question, but it seems I can't get Server.MapPath from Controller. I need to output json file list from images folder at wwwroot. They are is at wwwroot/images. How can I get a reliable wwwroot path?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNet.Mvc;
using www.Classes;
using System.Web;

namespace www.Controllers
{
    [Route("api/[controller]")]
    public class ProductsController : Controller
    {
        [HttpGet]
        public IEnumerable<string> Get()
        {
            FolderScanner scanner = new FolderScanner(Server.MapPath("/"));
            return scanner.scan();
        }
    }
}

Server.MapPath 似乎在 System.Web 命名空间中不可用.

Server.MapPath seems not available from System.Web namespace.

项目正在使用 ASP.NET 5 和 dotNET 4.6 框架

Project is using ASP.NET 5 and dotNET 4.6 Framework

推荐答案

您需要将 IWebHostEnvironment 注入到您的类中才能访问 ApplicationBasePath 属性值:阅读关于依赖注入.成功注入依赖后，wwwroot 路径 应该可供您使用.例如:

You will need to inject IWebHostEnvironment into your class to have access to the ApplicationBasePath property value: Read about Dependency Injection. After successfully injecting the dependency, the wwwroot path should be available to you. For example:

private readonly IWebHostEnvironment _appEnvironment;

public ProductsController(IWebHostEnvironment appEnvironment)
{
   _appEnvironment = appEnvironment;
}

用法:

 [HttpGet]
 public IEnumerable<string> Get()
 {
    FolderScanner scanner = new FolderScanner(_appEnvironment.WebRootPath);
    return scanner.scan();
 }

IHostingEnvironment 在 asp.net 的更高版本中已被 IWebHostEnvironment 取代.

IHostingEnvironment has been replaced by IWebHostEnvironment in later versions of asp.net.

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