protected void Page_Load(object sender, EventArgs e)
    {
    }
    public chart ChartUser(string UserId)
    {
        chart c = new chart();
        SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=emp;Integrated Security=True");
        // SqlDataAdapter da = new SqlDataAdapter("select * from ChartPie where id= UserId + "'", con);
        con.Open();
        SqlCommand cmd = new SqlCommand("select * from ChartPie where id='" + UserId + "'", con);
        SqlDataReader dr = cmd.ExecuteReader();
        while (dr.Read())
        {
            c.UserId = dr["UserId"].ToString();
            c.Language = dr["Language"].ToString();
            c.percentage = dr["percentage"].ToString();
        }

        return c;
    }
    public class chart
    {
        public string UserId { get; set; }
        public string Language { get; set; }
        public string percentage { get; set; }

    }
}

var chart = AmCharts.makeChart("chartdiv", {
            "type": "pie",
            "theme": "none",
            "legend": {
                "markerType": "circle",
                "position": "right",
                "marginRight": 80,
                "autoMargins": false
            },
            "dataProvider": [{
                "Language": "Tamil",
                "percentage": 50
            }, {
                "Language": "English",
                "percentage": 40
            }, {
                "Language": "Hindi",
                "percentage": 30
            }],
            "valueField": "percentage",
            "titleField": "Language",
            colorField: "color",
            "balloonText": "[[title]]<br><span style='font-size:14px'><b>[[value]]</b> ([[percents]]%)</span>",
            "exportConfig": {
                "menuTop": "0px",
                "menuItems": [{
                    "icon": '/lib/3/images/export.png',
                    "format": 'png'
                }]
            }
        });