IE6导出EXCEL的时候文件名丢失，文件后缀名.xls也丢失
一下代码导出的EXCEL在IE8上都没问题，到了IE6上就出现文件名变了，而且没有后缀名.xls，但是重命名后加上后缀名.xls以后就可以了，里面的数据写入都没错，这是问什么啊，怎么解决 哦？？？？  

public bool OutExcel(HttpContext context)
  {
  try
  {
  string s = context.Request.Form["SelSearch"];
  string s1 = context.Request.Form["HidContent"];
  HttpResponse resp;
  resp = context.Response;
  resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
  string fn = "户表小区：" + DateTime.Now.ToString() + ".xls";
  resp.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlPathEncode(fn));
  resp.ContentType = "Excel";//设置输出文件类型为excel文件。+ ".xls"
  string colHeaders = "";
  string ls_item = "";
  string condition = "";
  if (condition != "")
  {
  switch (s)
  {
  case "DistName":
  condition += " DistName=" + s1;
  break;
  case "AreaID":
  condition += GetAreaID(s1);
  break;

  }
  }
  else
  condition = " 1=1 ";
  DataTable dt = distbll.GetList(condition).Tables[0];
  //表头
  colHeaders += "编号\t";
  colHeaders += "客户编号\t";
  colHeaders += "小区名称\t";
  colHeaders += "所属区域\t";
  colHeaders += "添加时间\t";
  colHeaders += "修改时间\n";
  resp.Write(colHeaders);
  for (int i = 0; i < dt.Rows.Count; i++)
  {
  ls_item += dt.Rows[i]["AutoID"].ToString() + "\t";
  ls_item += dt.Rows[i]["UnitCode"].ToString() + "\t";
  ls_item += dt.Rows[i]["DistName"].ToString() + "\t";
  ls_item += dt.Rows[i]["AreaID"].ToString() + "\t";
  ls_item += dt.Rows[i]["AddTime"].ToString() + "\t";
  ls_item += dt.Rows[i]["ModifiedDate"].ToString() + "\n";
  resp.Write(ls_item);
  ls_item = "";
  }
  resp.End();
  return true;
  }
  catch (Exception ex)
  {
  throw ex;
  }
   
   
  }



------解决方案--------------------
不是ie版本的问题，是编码的问题的，你用utf-8编码试试。建议excel文件不要用中文名就不会出现这种问题了。