Question

以下是我的JSON回复

{  
   "status":"success",
   "results":[  
      {  
         "customer_id":"179",
         "customer_name":"satishakarma",
         "customer_email":"satish@gmail.com",
         "customer_username":"satish",
         "customer_mobileno":"9876543210",
         "game_amount":"1200"
      }
   ]
}

这是js代码

      success:function(e){
        var d = JSON.parse(e);
        if (d.status === 'success') {
          //window.location="game.html";\
          var user =  (JSON.stringify(d));
          console.log(user);
          console.log(user.results.customer_name);
          //localStorage.setItem(d.customer_name,d.game_amount);
        }else
        {
          alert('Username and Password Invslid');
        }
      }

我想从响应中获取客户名称

我写了console.log(user.results.customer_name);来在控制台中打印。但是出现Cannot read property 'customer_name' of undefined错误。如何从这个api获取客户名称？

Answer 1

由于您的results对象中只有一个user数组，因此您需要使用user.results[0]访问该数组。

var user = {  
   "status":"success",
   "results":[  
      {  
         "customer_id":"179",
         "customer_name":"satishakarma",
         "customer_email":"satish@gmail.com",
         "customer_username":"satish",
         "customer_mobileno":"9876543210",
         "game_amount":"1200"
      }
   ]
}

console.log(user.results[0].customer_name);

但是，如果results数组中有多个对象，那么可以在该数组上使用循环：

var user = {  
   "status":"success",
   "results":[  
      {  
         "customer_id":"179",
         "customer_name":"satishakarma",
         "customer_email":"satish@gmail.com",
         "customer_username":"satish",
         "customer_mobileno":"9876543210",
         "game_amount":"1200"
      },
       {  
         "customer_id":"180",
         "customer_name":"satishakarma2",
         "customer_email":"satish2@gmail.com",
         "customer_username":"satish2",
         "customer_mobileno":"9876543210",
         "game_amount":"1200"
      }
   ]
}

user.results.forEach(obj=>console.log(obj.customer_name));

还要确保user变量具有对象而不是字符串化的JSON。如果这是一个字符串变量，那么你需要将它解析为JSON，否则你将获得Uncaught TypeError: Cannot read property '0' of undefined

var user = `{  
   "status":"success",
   "results":[  
      {  
         "customer_id":"179",
         "customer_name":"satishakarma",
         "customer_email":"satish@gmail.com",
         "customer_username":"satish",
         "customer_mobileno":"9876543210",
         "game_amount":"1200"
      }
   ]
}`;
user = JSON.parse(user);

console.log(user.results[0].customer_name);

Answer 2

它在阵列中......

console.log(user.results[0].customer_name)

Answer 3

console.log(user.results[0].customer_name)

Answer 4

将您的代码更改为

success:function(e){
        var d = JSON.parse(e);
        if (d.status === 'success') {
          //window.location="game.html";\
          var user =  d;
          console.log(user);
          console.log(user.results[0].customer_name);
          //localStorage.setItem(d.customer_name,d.game_amount);
        }else
        {
          alert('Username and Password Invslid');
        }
      }

现在您将能够看到正确的结果。您已经对该对象进行了字符串化，这使得无法使用点运算符进行调用。

无法从JSON读取未定义的属性“customer_name”

4 个答案: