/// <summary>

    /// layui在線編輯器里的上傳圖片功能
    /// </summary>
    /// <returns></returns>
    [HttpPost]
    public IActionResult UploadImage()
    {
        #region 文件上傳
        var imgFile = Request.Form.Files[0];
        if (imgFile != null && !string.IsNullOrEmpty(imgFile.FileName))
        {
            long size = 0;
            string tempname = "";
            var filename = ContentDispositionHeaderValue
                            .Parse(imgFile.ContentDisposition)
                            .FileName
                            .Trim('"');
            var extname = filename.Substring(filename.LastIndexOf("."), filename.Length - filename.LastIndexOf("."));
            var filename1 = System.Guid.NewGuid().ToString().Substring(0, 6) + extname;
            tempname = filename1;
            var path = hostingEnv.WebRootPath;
            string dir = DateTime.Now.ToString("yyyyMMdd");
            if (!System.IO.Directory.Exists(hostingEnv.WebRootPath + $@"\upload\{dir}"))
            {
                System.IO.Directory.CreateDirectory(hostingEnv.WebRootPath + $@"\upload\{dir}");
            }
            filename = hostingEnv.WebRootPath + $@"\upload\{dir}\{filename1}";
            size += imgFile.Length;
            using (FileStream fs = System.IO.File.Create(filename))
            {
                imgFile.CopyTo(fs);
                fs.Flush();
            }
            return Json(new { code = 0, msg = "上傳成功", data = new { src = $"/upload/{dir}/{filename1}", title = "圖片標題" } });
        }
        return Json(new { code = 1, msg = "上傳失敗", });
        #endregion
    }

代碼里面的那個取WEB目錄路徑的hostingEnv需要在控制器的構造函數(shù)中注入一下，代碼如下：

private IHostingEnvironment hostingEnv;
public BlogController(IHostingEnvironment env)
{
this.hostingEnv = env;
}