fromdata上传文件,ajax上传文件, 纯js上传文件,html5文件异步上传

前端代码:

上传附件(如支付凭证等)
<input type="file" name="fileUpload" id="fileUpload" />
<ul id="imgPanle" style="width: 300px"></ul>

<script type="text/javascript">
     $(document).ready(function() {
         $("#fileUpload").change(function() {
         
             var formData = new FormData(); // FormData 对象
             formData.append("fileUpload", document.getElementById("fileUpload").files[0]); // 文件对象

$.ajax({
                 type: 'post',
                 url:  “/Attachment” //后台方法的路径
                 data: formData,
                 cache: false,
                 processData: false,
                 contentType: false
             }).success(function (tempdata) {
                 alert(data);
                
             }).error(function () {
                 alert("上传失败");
             });
         });
     });

</script>

asp.net

后端代码

/// <summary>
        /// 上传附件
        /// </summary>
        /// <param Name="file"></param>
        /// <param Name="OrderID"></param>
        /// <returns></returns>
        public ActionResult  Attachment(HttpPostedFileBase fileUpload, string OrderID)
        {
            //文件名
            var Name = System.IO.Path.GetFileName(fileUpload.FileName);
            System.IO.Stream str;
            int strLen;
            str = fileUpload.InputStream;
            strLen = Convert.ToInt32(str.Length);
            byte[] strArr = new byte[strLen];
            str.Read(strArr, 0, strLen);
            str.Close();

return Json(new{result=”OK”});
        }