public ActionResult ExecuteSQL(string sql, bool?IsExport)
 {
     try
     {
         if (IsExport.HasValue && IsExport.Value)
         {
             ExcelHelper excelHelper = new ExcelHelper();
             excelHelper.AddSheet("Sheet1", SqliteDBHelper.Query(sql).Tables[0]);
             excelHelper.Export();
             return(Content(string.Empty));
         }
         else
         {
             SqliteDBHelper.ExecuteSql(sql);
         }
         ViewBag.Message = "SQL执行成功";
         ViewBag.Access  = "True";
     }
     catch (Exception ex)
     {
         ViewBag.Message = "执行错误" + ex.Message;
     }
     return(View());
 }