namespace JqueryAjaxUploadTest
{
public partial class Upload : System.Web.UI.Page
{
protected void Page_Load(object sender,EventArgs e)
{
try
{
HttpPostedFile hpfFile = Request.Files["uploadfile"];
hpfFile.SaveAs(Server.MapPath("~/uploads/") + hpfFile.FileName);
Response.Write("success");
}
catch (Exception)
{

    Response.Write("fail"); 
  } 
} 

}
}