What should I do if a connection reset occurs during AjaxFileupload upload?

This article mainly introduces how to solve the problem of connection reset when AjaxFileupload is uploaded. Friends in need can refer to

1. The following problems will occur when AjaxFileupload is uploaded:

2. There are many solutions on the Internet. Here, I found another one. Maybe your error will be caused by this

------reason Yes: You did not return the data format string required by the front desk in the general handler

3. Here is an example:

Front desk:

<style type="text/css">
    .fileLink{position: relative;display: inline-block;background: #fff;border: 1px solid #0980D0;border-radius: 4px;padding: 2px 8px;margin-left:10px;margin-top:10px;overflow: hidden;color: #1E88C7;text-decoration: none;text-indent: 0;line-height: 20px;}
    .fileLink input {position: absolute;font-size: 100px;right: 0;top: 0;opacity: 0;}
    .fileLink:hover {background: #AADFFD;border-color: #78C3F3;cursor:pointer;color: #004974;text-decoration: none;}
  </style>
<span class="fL fileLink" style="padding-left: 10px;">选择文件<input type="file" id="uploadify" name="uploadify" value="上传数据" /></span>
<script src="../../Plugins/jquery/jquery-1.7.2.min.js" type="text/javascript"></script>
<script src="../../Plugins/ajaxfileupload.js" type="text/javascript"></script>
<script>
    $("#uploadify").on("change", function () {
      //var file = $("#uploadify")[0].files[0];
      $.ajaxFileUpload({
        url: &#39;./ImportDynamic.ashx&#39;,
        fileElementId: &#39;uploadify&#39;,
        dataType: &#39;text&#39;,
        success: function (data, status) {
          alert(1);
        },
        error: function () { }
      });
    });
</script>
一般处理程序：
      context.Response.ContentType = "text/plain";
      var filePath = "uploadfile/xxx.xls";
      filePath = context.Server.MapPath(filePath);
      Import.GetCommonReportFile(filePath);
      //context.Response.Write("返回文本数据，否则前台就会报如上错误");

4. Plug-in: files.cnblogs.com/files/namedL/ajaxfileupload.js

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