Hi rani,

Since the annotation role is not supported for column charts yet, value on top of each column cannot be done with a multi-column chart.

Only hover on the column you can see the value in tooltip.

Check this example. Now please take its reference and correct your code.

Database

For this example I have used of Northwind database that you can download using the link given below.

Download Northwind Database

Namespaces

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

Controller

public class HomeController : Controller
{
    // GET: /Home/
    public ActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public JsonResult AjaxMethod()
    {
        //Fetch the Statistical data from database.
        string query = "SELECT ShipCountry, DATEPART(Year, OrderDate) [Year], COUNT(OrderId) [Total]";
        query += " FROM Orders WHERE ShipCountry IN ('USA', 'France', 'Brazil', 'Canada')";
        query += " GROUP BY ShipCountry, DATEPART(Year, OrderDate)";
        DataTable dt = GetData(query);

        List<string> countryList = (from p in dt.AsEnumerable()
                                    select p.Field<string>("ShipCountry")).Distinct().ToList();

        //Get the DISTINCT Countries.
        List<object> chartData = new List<object>();
        List<string> countries = (from p in dt.AsEnumerable()
                                    select p.Field<string>("ShipCountry")).Distinct().ToList();

        //Insert Label for Country in First position.
        countries.Insert(0, "Country");

        //Add the Countries Array to the Chart Array.
        chartData.Add(countries.ToArray());


        //Get the DISTINCT Years.
        List<int> years = (from p in dt.AsEnumerable()
                            select p.Field<int>("Year")).Distinct().ToList();

        //Loop through the Years.
        foreach (int year in years)
        {
            List<object> totals = new List<object>();
            foreach (string country in countryList)
            {
                //Get the Total of Orders for each Country for the Year.
                var total = (from p in dt.AsEnumerable()
                                where p.Field<int>("Year") == year && p.Field<string>("ShipCountry") == country
                                select p.Field<int>("Total")).Cast<object>().FirstOrDefault();

                totals.Add(total == null ? 0 : total);
            }

            //Insert the Year value as Label in First position.
            totals.Insert(0, year.ToString());

            //Add the Years Array to the Chart Array.
            chartData.Add(totals.ToArray());
        }


        return Json(chartData);
    }

    private static DataTable GetData(string query)
    {
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter(query, con))
            {
                DataTable dt = new DataTable();
                sda.Fill(dt);
                return dt;
            }
        }
    }
}

View

<div ng-app="MyApp" ng-controller="MyController">
    <div id="chart" style="width: 500px; height: 400px;">
    </div>
</div>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript" src="https://code.angularjs.org/1.3.0/angular.js"></script>
<script type="text/javascript">
    var app = angular.module('MyApp', [])
    app.controller('MyController', function ($scope, $http, $window) {
        google.charts.load('current', { 'packages': ['corechart'] });
        google.charts.setOnLoadCallback(function () {
            $http.post("Home/AjaxMethod", { headers: { 'Content-Type': 'application/json'} })
            .then(function (r) {
                var options = {
                    title: 'Country wise Order Distribution',
                    width: 600,
                    height: 400,
                    legend: { position: 'top', maxLines: 3 },
                    bar: { groupWidth: '75%' },
                    isStacked: false
                };

                var data = google.visualization.arrayToDataTable(r.data);
                var chart = new google.visualization.BarChart(document.getElementById('chart'));
                chart.draw(data, options);
            }, function (response) {
                $window.alert(response.responseText);
            });
        });
    });      
</script>

Screenshot