从JSON检索值

Question

I want to extract the tenantId value from the below given json

{
  "ClientAccounts":{
   "@tenantId":"entpriseDemo",
   "clientAccount":[
    {
     "guid":"447a0bac-51e0-4f5f-b504-97dca5825530",
     "totalValueFormatted":"$1,100,000"
    }
   ]
  }
}

This is my javascript function for calling an ajax request and the success function code

$.ajax({
      url: "$clientAccountsURL",
      cache: false,
      dataType: "json", // set to json or xml
      success: function(data){

        alert(data.ClientAccounts.tenantId);


    } 
});

When I'm alerting the value of tenantId in the success function it's returning me undefined value though i checked on the firebug its available in the json array.

Is there any another way to retrieve the value of tenantId.

Answer 1

Use the square brackets notation

data.ClientAccounts['@tenantId']

From this mdn article :

An object property name can be any valid JavaScript string, or anything that can be converted to a string, including the empty string. However, any property name that is not a valid JavaScript identifier (for example, a property name that has a space or a hyphen, or that starts with a number) can only be accessed using the square bracket notation.

Answer 2

您应该能够像关联数组一样使用它来访问它：

data.ClientAccounts['@tenantId']

Answer 3

Since the property name contains an @ you will have to access the property using the associative array syntax.

data.ClientAccounts["@tenantId"];

JsFiddle: http://jsfiddle.net/VS9xe/

Answer 4

You can use either object notation or and associative array notation:

In your case, use associative array notation:

alert(data.ClientAccounts["@tenantId"]);

example: http://jsfiddle.net/2kdWQ/1/