JS实现给json数组动态赋值的方法示例

//1、
var jsonstr="[{'name':'a','value':1},{'name':'b','value':2}]";
var jsonarray = eval('('+jsonstr+')');
var arr =
  {
   "name" : $('#names').val(),
   "value" : $('#values').val()
  }
jsonarray.push(arr);
//2、
var json={};// 定义一个json对象
json.array1=["2","4"];// 增加一个新属性，此属性是数组
json.array1[json.array1.length]='6';// 数组追加一个元素
alert(json.array1)

var arr = {"id": scheduleId, "isDelete": true};
var jsonArray = JSON.parse(scheduleList);
jsonArray.push(arr);

var param = {};
 for(var i=0;i<fields.length;i++){
  var field = fields[i];
  if(field.searchCondition != undefined && $('#search'+field.name).val() != ''){
   param["search."+field.name]=$('#search'+field.name).val();
  }
 }

/测试动态创建数组，动态赋值json数据/
var json2 = "{'name':'zhangsan','age':99}";
var persons = new Array();
persons[ 0 ] = new Object();
persons[ 0 ].name = "xxx";
persons[ 0 ].age = 18;
persons[ 1 ] = new Function("return" + json2 )();
alert(  persons[ 1 ].name + persons[ 1 ].age );

/上面结果显示 zhangsan99/

/ json里面的数组转为JS的数组/
var jsonXX = "[ {name:'zhangsan',age:99},{name:'lisi',age:77}]";
var obj = new Function("return "+jsonXX)();
for(var b in obj)
{
alert(obj[b].name);
}

/补充安全一点做法是，要判断一下/

var obj=(function ToJSON(o)
{
if( typeof ( o ) == "string")
{
try
{
return new Function("return "+o)();
}
catch( e )
{
return null;
}
}
})( jsonXX);