从ASP.Net Core中的wwwroot / images获取图像

时间:2017-03-03 19:59:21

标签: asp.net-core asp.net-core-mvc asp.net-core-webapi

我在wwwroot / img文件夹中有一个图像,想在我的服务器端代码中使用它。

如何在代码中获取此图像的路径?

代码是这样的:

Graphics graphics = Graphics.FromImage(path)

5 个答案:

答案 0 :(得分:7)

注入IHostingEnvironment然后使用其WebRootPathWebRootFileProvider属性会更清晰。

例如在控制器中:

private readonly IHostingEnvironment env;
public HomeController(IHostingEnvironment env)
{
    this.env = env;
}

public IActionResult About(Guid foo)
{
    var path = env.WebRootFileProvider.GetFileInfo("images/foo.png")?.PhysicalPath
}

在视图中,您通常希望使用Url.Content("images/foo.png")来获取该特定文件的网址。但是,如果由于某种原因需要访问物理路径,那么您可以采用相同的方法:

@inject Microsoft.AspNetCore.Hosting.IHostingEnvironment env
@{ 
 var path = env.WebRootFileProvider.GetFileInfo("images/foo.png")?.PhysicalPath
}

答案 1 :(得分:2)

基于Daniel的答案,但专门针对ASP.Net Core 2.2:

在控制器中使用依赖项注入:

[Route("api/[controller]")]
public class GalleryController : Controller
{
    private readonly IHostingEnvironment _hostingEnvironment;
    public GalleryController(IHostingEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }        

    // GET api/<controller>/5
    [HttpGet("{id}")]
    public IActionResult Get(int id)
    {
        var path = Path.Combine(_hostingEnvironment.WebRootPath, "images", $"{id}.jpg");
        var imageFileStream = System.IO.File.OpenRead(path);
        return File(imageFileStream, "image/jpeg");
    }
}

将IHostingEnvironment的具体实例注入到您的控制器中,您可以使用它来访问WebRootPath(wwwroot)。

答案 2 :(得分:0)

这有效:

private readonly IHostingEnvironment env;
public HomeController(IHostingEnvironment env)
{
    this.env = env;
}

public IActionResult About()
{
    var stream = env.WebRootFileProvider.GetFileInfo("image/foo.png").CreateReadStream();
    System.Drawing.Image image = System.Drawing.Image.FromStream(stream);
    Graphics graphics = Graphics.FromImage(image);
}

答案 3 :(得分:0)

仅供参考。只需对此进行更新。在ASP.NET Core 3和Net 5中为:

    private readonly IWebHostEnvironment _env;

    public HomeController(IWebHostEnvironment env)
    {
        _env = env;

    }

    public IActionResult About()
    {
      var path = _env.WebRootPath;
    }

答案 4 :(得分:-2)

 string path =  $"{Directory.GetCurrentDirectory()}{@"\wwwroot\images"}";