json 问题

[xt218218]

{"dt":[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"},{"ID":"37","PARENTID":"3","AREANAME":"蚌埠","TYPEID":"2","SORTORDER":"100"},{"ID":"38","PARENTID":"3","AREANAME":"巢湖","TYPEID":"2","SORTORDER":"100"},{"ID":"39","PARENTID":"3","AREANAME":"池州","TYPEID":"2","SORTORDER":"100"},
ID":"3401","PARENTID":"3","AREANAME":"合肥","TYPEID":"2","SORTORDER":"100"}
]}

var id = [];
id = dt;
id.length=5;

但是
{"dt":[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
]}


id.length=0;
帮忙怎么处理后 有一条数据是 id.length=1???

[lsw645645645]

没看懂

[三石-gary]

id=dt+1;

[xt218218]

额..
就是 json 转换成数组 如有有4条数据 那数组的length=4;
但是 json 只有一个数据转换成数组 那length=0;。。
怎么处理后 在只有一条记录是 lenth=1?

[xt218218]

[Quote=引用 2 楼 zsx841021 的回复:]
id=dt+1;
[/Quote]
怎么判断时？才（id=dt+1）???
if(dt.length...) ?????

[fengyun817]

dt是个数组
{"dt":[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
]}

内容是[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}]
这个数组里只包含一个json格式对象
即：{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}

所以
dt.length ==1

[xt218218]

[Quote=引用 5 楼 fengyun817 的回复:]
dt是个数组
{"dt":[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
]}

内容是[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}]
这个数组里只包含一个json格式对象
即：……
[/Quote]


那如果
dt是不是个数组了？
{"dt":{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
}

[EEXXTTJJSS]

应该{"dt":[{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
]}就是dt.length ==1

[三石-gary]

[Quote=引用 2 楼 zsx841021 的回复:]

id=dt+1;
[/Quote]
抱歉 这不对

它本来就是1啊

[SwordMars]

不太明白楼主的意思，var obj=（你的json）, id=obj.bt(是个数组),这时候id.length=5;通过id[0]调用第一第json数据，即{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}

[xt218218]

我刚发现我后台生成的JSON 如果大于1 就是数组
如果是1就不是数组
就是
{"dt":{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
}

我想问下前台怎么处理后 赋给他的值的length=1了？

[fengyun817]

[Quote=引用 10 楼 xt218218 的回复:]

我刚发现我后台生成的JSON 如果大于1 就是数组
如果是1就不是数组
就是
{"dt":{"ID":"36","PARENTID":"3","AREANAME":"安庆","TYPEID":"2","SORTORDER":"100"}
}

我想问下前台怎么处理后 赋给他的值的length=1了？
[/Quote]

最好是后台统一，不管是几个都以数组方式返回。避免前台过多的处理。