Javascript 如何在javascript函数中传递一组json数据？
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How to pass a set of json data in javascript function?
提问by D Kim
I have a data set as below:
我有一个数据集如下：
data = '{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}';
数据 = '{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7, "b":8,"c":9}';
I am trying to make a function with the data set as its parameter, but the parameter wouldn't be read. Here is what I did:
我正在尝试使用数据集作为其参数创建一个函数，但不会读取该参数。这是我所做的：
function add(data) { alert(data); } add(data);
功能添加（数据）{ 警报（数据）；添加（数据）；
I only get [object Object],[object Object] ... What's the problem here? Thanks.
我只得到 [object Object],[object Object] ... 这里有什么问题？谢谢。
回答by Shashank
The JSON string is wrong. It should be actually:
JSON 字符串错误。其实应该是：
var data = '[{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}]';
After that, you need to convert the JSONString into JSONobject using the code below:
之后，您需要使用以下代码将JSON字符串转换为JSON对象：
JSON.parse(d) /* d is the parameter of the method 'add()' */
The alertwill give you [object Object]output, as the variable datais itself the object. So if you want to see the whole jsondata, you need to console.logas:
该alert给你[object Object]输出，作为变量data本身的对象。因此，如果您想查看整个json数据，则需要console.log：
console.log(JSON.parse(d));
Watch the demo.
观看演示。
回答by Karthik M R
First of all, your data value is incorrect. Since it has 3 objects it has to be in an array. So, your data should be
首先，您的数据值不正确。因为它有 3 个对象，所以它必须在一个数组中。所以，你的数据应该是
data = '[{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}]';
Then you need to use JSON.parse function to parse the string data into javascript object and then pass the object.
然后你需要使用 JSON.parse 函数将字符串数据解析为 javascript 对象，然后传递该对象。
function add(data)
{
alert(data);
alert(data[0].a); //access 1ts objects a value
}
var data = JSON.parse(data);
add(data);
回答by Pakkiya Nathan
am also getting same issue few hours later and I fixed it using JSON.parse(data)..Like bellow coding
几个小时后我也遇到了同样的问题，我使用 JSON.parse(data) 修复了它。就像波纹管编码
var data = '[{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}]';
var obj = JSON.parse(data);
obj.forEach(myFunction);
function myFunction(item, index) {
var eachid = item.id;
console.log("Item-id", eachid);//you will get id
add(eachid);
}
you are directly pass the data .so only you get the [objcet Object]...if you using JSON.parse(data) ,You will get the id of each item
你是直接传递数据。所以只有你得到 [objcet Object]...如果你使用 JSON.parse(data) ，你会得到每个项目的 id
回答by Shwetha
First you should pass the function an object parameter and you can store the object in an array:
首先，您应该向函数传递一个对象参数，然后可以将对象存储在数组中：
var data = []; //array
function add(d) {
data.push(d); //add passed item to array
console.dir(data); //this will print the whole object
}
add({"a":1,"b":2,"c":3});
console.dir()will make you print the properties within the object.
console.dir()将使您打印对象内的属性。
回答by Emil Haugberg van Veen
You can use JSON.stringify().
您可以使用JSON.stringify().
The data needs to have a JSON structure however.
但是，数据需要具有 JSON 结构。
So in your case that would be:
所以在你的情况下，这将是：
var data = [{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}]
add(JSON.stringify(data))
[{"a":1,"b":2,"c":3},{"a":4,"b":5,"c":6},{"a":7,"b":8,"c":9}] //output of JSON.Stringify()
