/*
上传图片到服务器  wx.uploadFile
url:后台上传文件路径地址
data:自定义参数 {'userID':'0001'}
fileName:接收数据的参数名称,后台参数类型：System.Web.HttpPostedFileWrapper
CallBack：返回路径
暂时fileName方法传的是：file
*/
function UploadImage(url,data,fileName,CallBack)
{
  wx.chooseImage({
    success: function (res) {
      var tempFilePaths = res.tempFilePaths
      wx.showLoading({ title: '正在上传', mask: true})
      wx.uploadFile({
        url: url,
        filePath: tempFilePaths[0],//临时路径
        name: fileName,
        formData: data,
        success: function (res) {
          var data = res.data
          wx.hideLoading()
          CallBack(data)
        }
      })
    }
  })
}

/// <summary>
        /// 上传图片
        /// </summary>
        /// <param name="file"></param>
        /// <param name="userID"></param>
        /// <returns></returns>
        public string UploadImage(HttpPostedFileWrapper file, string userID)
        {
            var msg= bll.UploadImage(file.InputStream, userID);
            var result = new ReturnResult<string>(msg);
            return result.Serialize();
        }