Controllers/HomeController.cs

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using Microsoft.AspNetCore.Mvc;
using System.Diagnostics;
using WeuiUploader.Models;

namespace WeuiUploader.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
        }

        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public string FileUpload()
        {
            try
            {
                var file = HttpContext.Request.Form.Files;
                string fileName = "";
                if (file != null && file.Count > 0)
                {
                    FileInfo fi = new FileInfo(file[0].FileName);
                    string fileSuffix = fi.Extension;
                    string filePath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot\\Uplaod\\");

                    if (!Directory.Exists(filePath))
                    {
                        Directory.CreateDirectory(filePath);
                    }
                    fileName = System.Guid.NewGuid().ToString()  + fileSuffix;
                    var filePaths = Path.Combine(filePath, fileName);
                    using (var stream = new FileStream(filePaths, FileMode.Create))
                    {
                         file[0].CopyToAsync(stream);
                    }
                }
                if (!string.IsNullOrEmpty(fileName))
                {
                    return  fileName;
                }
                else
                {
                    return "fail";
                }
            }
            catch (Exception)
            {
                //logger.write("文件上传失败")
                return "fail";

            }
        }