Question

嗨我有一个json字符串

"{"data":[{"Id":14,"ConfigName":"Online Hrs","ConfigValue":"00:01-23:59"},{"Id":15,"ConfigName":"Offline Days","ConfigValue":"Sunday"},{"Id":0,"ConfigName":"CurrentTime","ConfigValue":"11:3"}]}"

我想查看ConfigValue＆＃34;当前时间＆＃34;的ConfigName。目前我通过以下代码

访问它

var d = JSON.parse(data).data;
d[2].ConfigValue

但有时json字符串将是

"{"data":[{"Id":14,"ConfigName":"Online Hrs","ConfigValue":"00:01-23:59"},{"Id":0,"ConfigName":"CurrentTime","ConfigValue":"11:3"}]}"

根据上面的字符串现在，如果我想访问＆＃34; CurrentTime＆＃34;

我将不得不写下面的代码

 var d = JSON.parse(data).data;
    d[1].ConfigValue

那么有谁可以告诉如何访问它？因为数组可能随时改变，所以我不能像那样对数组索引进行硬编码。

Answer 1

你在字符串内外都有相同的引号而没有转义。但也许它只发生在问题文本中。

在这种情况下，你需要检查这样的每一项：

 for (var i in d) {
   if (d[i].Id == 0) {
       alert(d[i].ConfigName);
   }
 }

Answer 2

您可以运行循环并检查ConfigName的值。以下是代码

＆＃13;

var data = '{"data":[{"Id":14,"ConfigName":"Online Hrs","ConfigValue":"00:01-23:59"},{"Id":15,"ConfigName":"Offline Days","ConfigValue":"Sunday"},{"Id":0,"ConfigName":"CurrentTime","ConfigValue":"11:3"}]}';
var d = JSON.parse(data).data;

for(var i=0; i<d.length; i++)
{
if(d[i].ConfigName === 'CurrentTime')
  {
  	alert(d[i].ConfigValue); //Do stuff with the value.
  }
}

＆＃13;

Answer 3

你可以试试这个：

var k = {"data":[{"Id":14,"ConfigName":"Online Hrs","ConfigValue":"00:01-23:59"},{"Id":15,"ConfigName":"Offline Days","ConfigValue":"Sunday"},{"Id":0,"ConfigName":"CurrentTime","ConfigValue":"11:3"}]}
    
    var result = $(jQuery.parseJSON(JSON.stringify(k))).each(function() {  
         var configName = this.ConfigName;
         var configValue = this.ConfigValue;
         
    });
 console.log(result);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Answer 4

首先需要在“ConfigValue”等于“CurrentTime”的数组中找到对象。拥有此对象后，您只需访问其“CongigValue”属性即可。

var json1 = {"data":
             [
               {"Id":14,"ConfigName":"Online Hrs","ConfigValue":"00:01-23:59"},{"Id":15,"ConfigName":"Offline Days","ConfigValue":"Sunday"},{"Id":0,"ConfigName":"CurrentTime","ConfigValue":"11:3"}
             ]
            };

var json2 = {"data":
             [
               {"Id":14,"ConfigName":"Online Hrs","ConfigValue":"00:01-23:59"},{"Id":0,"ConfigName":"CurrentTime","ConfigValue":"11:3"}
             ]
            };


var currentTime = findCurrentTime( json1 );
console.log( "currentTime: " + currentTime );

var currentTime = findCurrentTime( json2 );
console.log( "currentTime: " + currentTime );



function findCurrentTime( jsonObj )
{
  var filteredArray = jsonObj.data.filter(function(element){
     return element.ConfigName === "CurrentTime";
  });//filter()

  if( filteredArray.length > 0 )
    return filteredArray[0].ConfigValue;
  
  return false;
}//findCurrentTime()

使用键值从json字符串中获取值

4 个答案: