public static string DeleteFile(string prequestId, int pdocsl_no)
{
SpManager spManager = new SpManager();
string make_by = HttpContext.Current.Session["USER_ID"].ToString();
Dictionary <string, object> inputParam = new Dictionary <string, object>();
inputParam.Add("prequest_id", prequestId);
inputParam.Add("pmake_by", make_by);
inputParam.Add("pdocsl_no", pdocsl_no);
DataTable dt = spManager.DeleteFile(inputParam);
return(DatatableToJson(dt));
}