Display Google Donut Chart in MVC C# Ajax Services

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In this Section, We See about Display Google Donut Charts Using MVC C# Ajax Services.

Controller:

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Chartsprojects.Controllers
{
    public class GoogleChartsController : Controller
    {
     
        public ActionResult GoogleDonutCharts()
        {
            return View();
        }



        public class Det
        {
            public int Id;

            public String Name;
            public decimal yVal;
        }

        public JsonResult DispRec()
        {

            SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["blogger"].ToString());
            List<Det> obj = new List<Det>();
            cn.Open();

            DataTable dt = new DataTable();

            SqlCommand cmd = new SqlCommand();
            SqlDataAdapter da = new SqlDataAdapter("select * from mGoogleChartData", cn);
            da.Fill(dt);
            cn.Close();

            foreach (DataRow dr in dt.Rows)
            {
                Det def = new Det();

                def.Id = Convert.ToInt32(dr[0].ToString());
                def.Name = dr[1].ToString();
                def.yVal = Convert.ToDecimal(dr[2].ToString());
                obj.Add(def);
            }
            return Json(obj, JsonRequestBehavior.AllowGet);

        }
       }

}

View Page:


@{

    Layout = null;

}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>GoogleDonutCharts</title>
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">

        google.charts.load('current', { 'packages': ['corechart'] });
        google.charts.setOnLoadCallback(drawChart);

        function drawChart() {

            $.ajax({
                cache: false,
                async: false,
                type: "POST",
                dataType: "Json",
                contentType: "application/json; charset=utf-8",
                url: "/GoogleCharts/DispRec",
                // data: {},
                success: function (data) {
                    var len = data.length;
                    var gldata = new google.visualization.DataTable();

                    gldata.addColumn('string', 'name');
                    gldata.addColumn('number', 'yVal');


                    for (var i = 0; i < len; i++) {
                        gldata.addRow([data[i].Name, data[i].yVal]);
                    }
                    var options = {
                        title: 'Donut Charts',
                        pieHole: 0.4,
                    };


                    var chart = new google.visualization.PieChart(document.getElementById('donutchart'));
                    chart.draw(gldata, options);


                },
                error: function (result) {
                    console.log(result);

                }
            });
        }


    </script>
</head>
<body>
    <div id="donutchart" style="width: 900px; height: 500px;"></div>
</body>
</html>

Donut Chart


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