json 问题

Question

{"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???

Answer 1

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?

Answer 2

怎么判断时？才（id=dt+1）???
 if(dt.length...)  ?????

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

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"}

Answer 7

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？