Display Records in Gridview from REST Service / JSON

Hi,
I need to display record while fetching data from rest service.
Data format will be like:
{
        "date ": "2012-06-14T00:00:00",
        "dmms": [
            {
                "data_date": "2014-03-07T00:00:00",
                "dt": 23.5722495342674,
               
            },
            {
            &n ...