Retrieving values from JSON object

Question

I have an xml file that has been converted to the json listed below. I have been trying to figure out how to retrieve -Name and -Value from each of the Attributes with no luck. I'm guessing I need to create a sub-object that is equal to jsonobj.Media.Attribute[i], but am unable to access -Name or -Value once I do that. Any suggestions?

jsonobj= {
      "Media": {
            "Attribute": [
              {
                "-Name": "Keywords",
                "-Value": "keyword value"
              },
              {
                "-Name": "Title",
                "-Value": "title value"
              },
              {
                "-Name": "Description",
                "-Value": "description value"
              },
              {
                "-Name": "Author",
                "-Value": "author value"
              },
              {
                "-Name": "Copyright",
                "-Value": "copyright value"
              }
            ]
          }
        };

Hint: You can use ['-Name'] to access elements of the object. — gen_Eric
– gen_Eric, Commented Feb 27, 2013 at 19:25
iterate jsonobj.Media.Attribute and use ['-Name'] to retrieve the value. — Derek
– Derek, Commented Feb 27, 2013 at 19:28
I've create a subobject and attempted to access it using subobject[0].Name (returns undefined). I've tried subobject[0].-Name (throws an error), If I just do a console.debug on subobj, I get Object {-Name: "Keywords", -Value: "keyword value"}. I can't seem to get anything else from it. — user1549568
– user1549568, Commented Feb 27, 2013 at 19:29
Definitely, you cannot use subobject[0].-Name to access the object because - is an operator. If you execute the code, you get an error. Change it to subobject[0].["-Name"] will fix the problem. — Derek
– Derek, Commented Feb 27, 2013 at 19:31

KevSheedy · Accepted Answer · 2013-02-27 19:28:34Z

2

This will alert all the values you're looking for:

var list = jsonobj.Media.Attribute
for(index in list)
{
    var obj = list[index];
    var name = obj["-Name"];
    var value = obj["-Value"];

    alert(name);
    alert(value);
}

answered Feb 27, 2013 at 19:28

KevSheedy

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1 Comment

user1549568 Over a year ago

Excellent! Thank you. Very clear what is going on once I see the code.

Derek · Accepted Answer · 2013-02-27 19:29:32Z

1

Iterate jsonobj.Media.Attribute and use ['-Name'] to retrieve the value

for(var i = 0; i < jsonobj.Media.Attribute.length ; i++)
{
 var attr = jsonobj.Media.Attribute[i]
 alert(attr["-Name"]);
 alert(attr["-Value"]);
}

answered Feb 27, 2013 at 19:29

Derek

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Comments

kelvinst · Accepted Answer · 2013-02-27 19:43:46Z

0

You can not use - in the code, cause it is an operator, and JS will not recognize it as a method.

To solve your problem you can access the properties using other way.

Otherwise your code: jsonobj.Media.Attribute[i].-Name

You can use: jsonobj.Media.Attribute[i].["-Name"]

What is the same from calling, for an example: jsonobj.["Media"].Attribute[i].["-Name"]

answered Feb 27, 2013 at 19:43

kelvinst

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user2384660 · Accepted Answer · 2013-05-15 07:02:02Z

0

It can not identify key Attribute. Says can not read property 'Attribute' of undefined.

answered May 15, 2013 at 7:02

user2384660

1

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