$.ajax传JSON数据到后台出现报错问题解决

代码如下: $.ajax({ url: “../Services.ashx”, type: “POST”, //data: { ‘data’: { ‘typename’: JSON.stringify(typename) }, ‘operationType’: ‘2’ }, data: { ‘data’: typename, ‘operationType’: ‘2’,’nowheight’:nowheight,’nowarea’:nowarea }, success: function (msg) {} }) js代码如上,当data中的‘键’-‘值’对中的值为null(undefined)