layui.use('upload', function () {
    var upload = layui.upload;

    upload.render({
      elem: '#LAY_avatarUpload'
      , url: setter.apiDomain + '/api/WxPay/UploadFileByStream_Head'
      , choose: function (obj) {
        //將每次選擇的檔案追加到檔案佇列
        var files = obj.pushFile();

        //預讀本地檔案，如果是多檔案，則會遍歷。(不支援ie8/9)
 

        obj.preview(function (index, file, result) {
          console.log(index); //得到檔案索引
          console.log(file); //得到檔案物件
          console.log(result); //得到檔案base64編碼，比如圖片

          //obj.resetFile(index, file, '123.jpg'); //重新命名檔名，layui 2.3.0 開始新增

          //這裡還可以做一些 append 檔案列表 DOM 的操作

          
 
//obj.upload(index, file); //對上傳失敗的單個檔案重新上傳，一般在某個事件中使用
          //delete files[index]; //刪除列表中對應的檔案，一般在某個事件中使用
        });

      }
      , done: function (index, res) {
        //上傳完畢回撥
        if (index.Data.Url != "") {
          var url = index.Data.Url;
          $(".UserHeadImgUrl").attr('src', setter.apiDomain + url);
        }
        
 
var UserHeadImgUrl = $('.UserHeadImgUrl').attr("src");
        var url = '/api/Userinformation/EditImg';                  ----這個主要就是更改欄位，就沒粘上來
        var parment = {
          UserHeadImgUrl: UserHeadImgUrl
        }
        callpack = function ()
        {

        }
        admin.ajax(url, parment, callpack)
      }
      , error: function (index) {
        //請求異常回調
      }
    });
  })


------------介面 UploadFileByStream_Head

public ResultInfo<UploadFileResponseModel> UploadFileByStream_Head()
        {
            var info = new ResultInfo<UploadFileResponseModel>();
            try
            {
                #region 校驗資料

                if (!Request.Content.IsMimeMultipartContent())
                {
                    info.Result = false;
                    info.StatusCode = (int)StatusCodeEnum.HttpRequestError;
                    info.State = StatusCodeEnum.HttpRequestError.ToString();
                    info.Msg = "不是有效的上傳方式";

                    return info;
                }

                if (HttpContext.Current.Request.Files.Count <= 0)
                {
                    info.Result = false;
                    info.StatusCode = (int)StatusCodeEnum.HttpRequestError;
                    info.State = StatusCodeEnum.HttpRequestError.ToString();
                    info.Msg = "沒有上傳檔案";

                    return info;
                }
                #endregion

                var resInfo = new UploadFileResponseModel();
                HttpPostedFile file = HttpContext.Current.Request.Files[0];
                var ext = Path.GetExtension(file.FileName);
                var fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + "_" + Funcs.GetRandom(1000000, 10000000) + ext;

                var filesName = DateTime.Now.ToString("yyyyMMddHH");
                var url = "/Upload/Consignor/Img/" + filesName + "/" + fileName;
                var path = HttpContext.Current.Server.MapPath("/Upload/Consignor/Img/" + filesName + "/");
                Directory.CreateDirectory(path);
                var fullFileName = path + fileName;
                file.SaveAs(fullFileName);

                //返回資料
                resInfo.FileName = fileName;
                resInfo.ImagesType = "介面上傳Stream";
                resInfo.LocalPath = file.FileName;
                resInfo.Url = url;
                info.Result = true;
                info.StatusCode = (int)StatusCodeEnum.Success;
                info.State = StatusCodeEnum.Success.ToString();
                info.Data = resInfo;
                info.Msg = "上傳成功";

                return info;
            }
            catch (Exception ex)
            {
                string msg = "出現異常：" + ex.Message;
                info.Result = false;
                info.StatusCode = (int)StatusCodeEnum.Error;
                info.State = StatusCodeEnum.Error.ToString();
                info.Msg = msg;
                return info;
            }
        }；