<input id="file1" style=" 240px; height: 20px; display:none;" type="file" size="20" name="file">
string str = Request.Form["Upfile"].ToString();
<input id="file1" style=" 240px; height: 20px; display:none;" type="file" size="20" name="file">
string str = Request.Form["Upfile"].ToString();