NET5配合vue3图片上传

后端函数

        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="files">文件流</param>
        /// <returns></returns>
        [HttpPost]
        public void FileSave(List < IFormFile > files)
        {
            //返回的文件地址
            List < string > filenames = new List < string > ();
            DateTime now = DateTime.Now;
            //文件存储路径
            string filePath = string.Format("/Uploads/{0}/{1}/{2}/", now.ToString("yyyy"), now.ToString("yyyyMM"), now.ToString("yyyyMMdd"));
            //获取当前web目录
            var webRootPath = "File/";;
            if (!Directory.Exists(webRootPath + filePath))
            {
                Directory.CreateDirectory(webRootPath + filePath);
            }
            try
            {
                foreach(var item in files)
                {
                    if (item != null)
                    {
                        #
                        region 图片文件的条件判断
                        //文件后缀
                        string fileExtension = Path.GetExtension(item.FileName);
                        //判断后缀是否是图片
                        const string fileFilt = ".gif|.jpg|.jpeg|.png";
                        if (fileExtension == null)
                        {
                            break;
                            //return Error("上传的文件没有后缀");
                        }
                        if (fileFilt.IndexOf(fileExtension.ToLower(), StringComparison.Ordinal) <= -1)
                        {
                            break;
                            //return Error("请上传jpg、png、gif格式的图片");
                        }
                        //判断文件大小
                        long length = item.Length;
                        if (length > 1024 * 1024 * 2) //2M
                        {
                            break;
                            //return Error("上传的文件不能大于2M");
                        }#
                        endregion
                        string strDateTime = DateTime.Now.ToString("yyMMddhhmmssfff"); //取得时间字符串
                        string strRan = Convert.ToString(new Random()
                            .Next(100, 999)); //生成三位随机数
                        string saveName = strDateTime + strRan + fileExtension;
                        //插入图片数据
                        using(FileStream fs = System.IO.File.Create(webRootPath + filePath + saveName))
                        {
                            item.CopyTo(fs);
                            fs.Flush();
                        }
                        filenames.Add(filePath + saveName);
                    }
                }
            }
            catch (Exception ex)
            {
                //这边增加日志，记录错误的原因
                //ex.ToString();
            }
        }
        

前端使用

handleUploadImage函数

files md插件已经获取到图片文件

async function handleUploadImage(_event: any, insertImage: any, files: any) {
  const file = files
  const formData = new FormData()
  for (var i = 0; i < file.length; i++) {
    formData.append('files', files[i])
  }
  await common.uploadImg(formData).then((res: any) => {
    insertImage({
      url: res.data,
      desc: files[0].name
      // width: 'auto',
      // height: 'auto',
    })
  })
}

axios uploadImg函数

  static async uploadImg(data: FormData) {
    return request({
      url: "/api/v1/common/upload-file",
      method: 'post',
      headers: { "Content-Type": "multipart/form-data" },
      data: data
    })
  }

axios 增加判断

if (config.method !== 'post' && config.headers['Content-Type'] !== 'multipart/form-data') {
      config.data = qs.parse(config.data);
    }