AJAX responseText undefined
问题 Javascript code: ............... ............... var cutid = $(th).attr("data-cutid"); var request = $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "Services/Cut.asmx/CheckCuts", data: "{'cuts':" + JSON.stringify(ListCuts) + ",'idCut':'" + cutid + "'}", dataType: "json" }).responseText; alert(request); // undefined Function from web service: [WebMethod] public string CheckCuts(List<CutM> cuts, Guid idCut) { return UtilCut.CheckCuts(cuts, idCut).ToString(); } The