一. 前端程式碼

 @using (Html.BeginForm("UploadFile", "Home", FormMethod.Post, new {enctype = "multipart/form-data"}))
        {
            <div>檔案上傳：<input type="file" name="myFile"/></div>
            <input type="submit" value="提交"/>
        }

二. 後端程式碼

        /// <summary>
        ///
 
 上傳檔案
        /// </summary>
        /// <returns>上傳檔案結果資訊</returns>
        [HttpPost]
        public ActionResult UploadFile()
        {
            HttpPostedFileBase file = Request.Files["myFile"];
            if (file != null)
            {
                try
                {
                    
 
//檢查是否存在資料夾
                    string subPath = "D:\\pic";
                    if (false == System.IO.Directory.Exists(subPath))
                    {
                        //建立pic資料夾
                        System.IO.Directory.CreateDirectory(subPath);
                    }                                  
                    
 
var filename = Path.Combine("D:\\pic", file.FileName);  //Path.Combine(Request.MapPath("~/Upload"), file.FileName); MapPath：虛擬目錄
                    file.SaveAs(filename);
                    return Content("上傳完成");
                }
                catch (Exception ex)
                {
                    return Content(string.Format("上傳檔案出現異常：{0}", ex.Message));
                }

            }
            else
            {
                return Content("沒有檔案需要上傳！");
            }
        }