ASP.NET C# zipping files on server very slow -


i need 100 files form database, zip them , download them. goes slow. wrong?

foreach (gridviewrow row in grdreport2.rows)             {                 checkbox chkboxrows = (checkbox)row.findcontrol("chkemp1");                 if (chkboxrows.checked == true)                 {                     mysqlcommand sqlcommand = new mysqlcommand();                     try                     {                         string chave = row.cells[2].text;                          sqlcommand.commandtype = commandtype.text;                         sqlcommand.connection = cnn;                         sqlcommand.commandtext = "select xml cte chcte = '" + chave + "'";                         dynamic k = sqlcommand.executereader();                         if (k.read() == true)                         {                             string xml = k["xml"];                             system.io.file.writealltext(zippath + "\\" + chave + "-proccte.xml", xml);                             oneisdone = true;                          }                         k.close();                     }                      catch (exception ex)                     { string = ex.message; }                      sqlcommand.dispose();                     sqlcommand = null;                 }             }              if (oneisdone)             {                 try                 {                     zipfile.createfromdirectory(zippath, system.io.path.gettemppath() + t + "nfe.zip", compressionlevel.optimal, false);                     response.appendheader("content-disposition", "attachment; filename=" + lblclient.text + " " + cbtipo.selecteditem.text + txtfrom.text.replace("//", "-") + "|" + txtto.text.replace("//", "-") + ".zip");                     response.transmitfile(system.io.path.gettemppath() + t + "nfe.zip");                     response.contenttype = "application/zip";                     response.flush();                 }                 catch { }                 response.end();              }         }


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