how to get objects from array which is a value of a key in json.

how to get objects from array which is a value of a key in json.

hi,

i have to get the value of key ScurvepPlanData  from following json, which is an array.
then i have to itrate each object. pls tel me how to do it. 

  1. "ScurvePlanName": "PipeTrack",
    "ScurvePlanData": [{
        "Levels": "Mechanical",
        "Scope": null,
        "StartDate": null,
        "EndDate": null,
        "Weightage": {
            "$numberDouble": "20"
        },
        "ParentLevels": "",
        "ActivityId": null,
        "IsInternal": false
    }, {
        "Levels": "Welding",
        "Scope": {
            "$numberDouble": "2000"
        },
        "StartDate": "898989667687687768768",
        "EndDate": "898989667687687768768",
        "Weightage": {
            "$numberDouble": "5"
        },
        "ParentLevels": "Mechanical",
        "ActivityId": {
            "$numberDouble": "5"
        },
        "IsInternal": true
    }]
}
yours sincerley