如何在ASP NET核心中获取绝对路径100替代方式
我试过用100，但效果不好.
IHostingEnvironment env = new HostingEnvironment();
var str1 = env.ContentRootPath; // Null
var str2 = env.WebRootPath; // Null, both doesn't give any result
我有一个图像文件(Sample.PNG)在wwwroot个文件夹中，我需要得到这个绝对路径.
从.Net Core v3.0开始，访问已移动到Web特定环境界面的WebRootPath应该是IWebHostEnvironment.
将IWebHostEnvironment作为依赖项注入依赖类.框架将为您填充它
public class HomeController : Controller {
private IWebHostEnvironment _hostEnvironment;
public HomeController(IWebHostEnvironment environment) {
_hostEnvironment = environment;
}
[HttpGet]
public IActionResult Get() {
string path = Path.Combine(_hostEnvironment.WebRootPath, "Sample.PNG");
return View();
}
}
您可以更进一步，创建您自己的路径提供程序服务抽象和实现.
public interface IPathProvider {
string MapPath(string path);
}
public class PathProvider : IPathProvider {
private IWebHostEnvironment _hostEnvironment;
public PathProvider(IWebHostEnvironment environment) {
_hostEnvironment = environment;
}
public string MapPath(string path) {
string filePath = Path.Combine(_hostEnvironment.WebRootPath, path);
return filePath;
}
}
并将IPathProvider注入依赖类.
public class HomeController : Controller {
private IPathProvider pathProvider;
public HomeController(IPathProvider pathProvider) {
this.pathProvider = pathProvider;
}
[HttpGet]
public IActionResult Get() {
string path = pathProvider.MapPath("Sample.PNG");
return View();
}
}
确保向DI容器注册服务
services.AddSingleton<IPathProvider, PathProvider>();