How do I read in a file from disc during runtime i

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How do I read a local file in my ASP.NET Core project 2 answers

In my solution I have a file called beep.png directly in the root, right next to Startup.cs file. I changed its properties to always copy. I activated UseFileServer and opted in to browse the directory structure to be sure.

However, when I run the code Image.FromFile("beep.png");, I only get the error that the file isn't found.

System.IO.FileNotFoundException
Message=C:\Program Files\IIS Express\beep.png

How can I enable the file to be accessible?

Use IHostingEnvirounment to get the root content path (technicaly the project folder), or to get the web root path (the wwwroot folder under project folder).

_hostingEnvirounment.ContentRootPath will return:

D:\Hosting\ProjectFolder

_hostingEnvirounment.WebRootPath will rturn:

D:\Hosting\ProjectFolder\wwwroot

So in your case; inject IHostingEnvirounment to your controller then get the content root folder as below:

public class MyApiController : ControllerBase {

    private readonly IHostingEnvirounment _hostingEnvirounment;

    public MyApiController(IHostingEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    // get image from project root folder \ProjectFolder\
    public Image GetImageFromContentRoot(string name) {

        // e.g.: imgPath = "D:\\Hosting\\ProjectFolder\\beep.png"
        var imgPath = Path.Combine(_hostingEnvirounment.ContentRootPath, name);

        return Image.FromFile(imgPath);
    }

    //get image from projects wwwroot folder
     public Image GetImageFromWebRoot(string name) {

        // e.g.: imgPath = "D:\\Hosting\\ProjectFolder\\wwwroot\\beep.png"
        var imgPath = Path.Combine(_hostingEnvirounment.WebRootPath, name);

        return Image.FromFile(imgPath);
    }
}