怎么样读取JSON？

Question

{"d":"{\"itemcats_get_response\":{\"item_cats\":{\"item_cat\":[{\"cid\":30,\"is_parent\":true,\"name\":\"男装\",\"parent_cid\":0},{\"cid\":50008164,\"is_parent\":true,\"name\":\"住宅家具\",\"parent_cid\":0},{\"cid\":50020611,\"is_parent\":true,\"name\":\"商业\\/办公家具\",\"parent_cid\":0},返回的JSON前面有这些个东西 我要读的是 NAME 和CID..

Answer 1

http://apps.hi.baidu.com/share/detail/30693921

Answer 2

返回json格式var collection = result.d.itemcats_get_response.item_cats.item_cat;
    for(var i=0;i<collection.length;i++){
        alert(collection[i].cid+"=="+collection[i].name)
    }

Answer 3

//循环结果i为循环下标,n为结果
var data = jQuery.parseJSON(你的字符串);
$.each(data.d, function(i, n) {
//这样就可以取到了
   var name= n.NAME;
   var cid=n.CID;
});

Answer 4

{"d":"{\"itemcats_get_response\":{\"item_cats\":{\"item_cat\":[{\"cid\":50017905,\"is_parent\":false,\"name\":\"游戏掌机\\/PSP\\/NDSL\",\"parent_cid\":20},{\"cid\":50017906,\"is_parent\":false,\"name\":\"家用游戏机\\/PS3\\/Wii\\/XBOX\",\"parent_cid\":20},{\"cid\":50012068,\"is_parent\":false,\"name\":\"游戏手柄\",\"parent_cid\":20},{\"cid\":50012834,\"is_parent\":true,\"name\":\"游戏软件\",\"parent_cid\":20},{\"cid\":50012079,\"is_parent\":false,\"name\":\"方向盘\",\"parent_cid\":20},{\"cid\":50012080,\"is_parent\":false,\"name\":\"摇杆\",\"parent_cid\":20},{\"cid\":50012160,\"is_parent\":true,\"name\":\"PSP专用配件\",\"parent_cid\":20},{\"cid\":50012161,\"is_parent\":true,\"name\":\"WII专用配件\\/周边\",\"parent_cid\":20},{\"cid\":50012162,\"is_parent\":true,\"name\":\"PS2\\/PS3专用配件（包含PS1)\",\"parent_cid\":20},{\"cid\":50012163,\"is_parent\":true,\"name\":\"NDSI\\/NDSL专用配件\",\"parent_cid\":20},{\"cid\":50018082,\"is_parent\":true,\"name\":\"XBOX专用配件\",\"parent_cid\":20},{\"cid\":50018224,\"is_parent\":true,\"name\":\"世嘉 DC\\/MD\\/SS\\/SEGA 专用配件\",\"parent_cid\":20},{\"cid\":50018225,\"is_parent\":true,\"name\":\"任天堂NGC\\/FC\\/N64\\/SFC 专用配件\",\"parent_cid\":20},{\"cid\":50018230,\"is_parent\":true,\"name\":\"任天堂掌机配件\",\"parent_cid\":20}]}}}"}
我是后台调用返回的string，然后前台用JQUERY，读出来，用FIREBUG看是这样的
取不出来值啊

Answer 5

data = jQuery.parseJSON("你的json字符串形式")

Answer 6

data = jQuery.parseJSON("你的json字符串形式")

Answer 7

eval 和 $.parseJSON 都可以，你也可以直接指定返回的内容就是json

Answer 8

var res = eval(json);
 for (var i = 0; i < res.length; i++){
    //alert(res[i].CID);
    alert(res[i].CID + ">>" +res[i].NAME);
 }

Answer 9

<script type="text/javascript">
        $(document).ready(function () {
            var cid = 20;
            var txt;
            $.ajax({
                type: "POST",
                contentType: "application/json",
                url: "GetTaoBaoItemCats.asmx/GetItemCats",
                data: "{cid:" + cid + "}",
                dataType: 'json',
                error: function (result, status) { //如果没有上面的捕获出错会执行这里的回调函数
                    if (status == 'error') {
                        alert(status);
                    }
                },                success: function (result) {
                    var data = result.d;                    alert(data);                     });
                                    }
            });        });
    
    </script>这样我可以弹出数据如下。。
{"itemcats_get_response":{"item_cats":{"item_cat":[{"cid":50017905,"is_parent":false,"name":"游戏掌机\/PSP\/NDSL","parent_cid":20},{"cid":50017906,"is_parent":false,"name":"家用游戏机\/PS3\/Wii\/XBOX","parent_cid":20},{"cid":50012068,"is_parent":false,"name":"游戏手柄","parent_cid":20},{"cid":50012834,"is_parent":true,"name":"游戏软件","parent_cid":20},{"cid":50012079,"is_parent":false,"name":"方向盘","parent_cid":20},{"cid":50012080,"is_parent":false,"name":"摇杆","parent_cid":20},{"cid":50012160,"is_parent":true,"name":"PSP专用配件","parent_cid":20},{"cid":50012161,"is_parent":true,"name":"WII专用配件\/周边","parent_cid":20},{"cid":50012162,"is_parent":true,"name":"PS2\/PS3专用配件（包含PS1)","parent_cid":20},{"cid":50012163,"is_parent":true,"name":"NDSI\/NDSL专用配件","parent_cid":20},{"cid":50018082,"is_parent":true,"name":"XBOX专用配件","parent_cid":20},{"cid":50018224,"is_parent":true,"name":"世嘉 DC\/MD\/SS\/SEGA 专用配件","parent_cid":20},{"cid":50018225,"is_parent":true,"name":"任天堂NGC\/FC\/N64\/SFC 专用配件","parent_cid":20},{"cid":50018230,"is_parent":true,"name":"任天堂掌机配件","parent_cid":20}]}}}我现在是要读取这些个数据，循环出业NAME和CID

Answer 10

success: function (result) {
                    var data = result.d.itemcats_get_response.item_cats.item_cat;
                    $.each(data, function (index, item) { 
                           alert('id:'+item.cid+'|name:'+item.name);                    }
          });

Answer 11

result.d.itemcats_get_response is undefined
[在此错误处中断] var data = result....ats_get_response.item_cats.item_cat; 出现的是这个错误大哥你先测试下啊。。

Answer 12

var data = result.d["itemcats_get_response"]["item_cats.item_cat"];