Showing Google Chart (Pie) in ASP.Net With Database Using jQuery

Rahul Saxena
10y
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Article

The following is my SQL Server Data Table with the data I will show in the chart.

Image 1.

Here I will show the total number of users by their city (Address). The following is my table in design mode.

Image 2.

The following is the script of my table:

CREATE TABLE [dbo].[Employee](
[CompanyName] [varchar](50) NULL,
[EmployeeCode] [int] NOT NULL,
[EmployeeSupervisorCode] [int] NULL,
[EmployeeName] [varchar](50) NULL,
[ProjectName] [varchar](50) NULL,
[JoiningDate] [datetime] NULL,
[Experience] [varchar](50) NULL,
[Mobile] [varchar](15) NULL,
[Address] [varchar](50) NULL,
[CreatedDate] [datetime] NULL,
CONSTRAINT [PK_Employee] PRIMARY KEY CLUSTERED
(
[EmployeeCode] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO

The following is the aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="jQueryGoogleChart.aspx.cs" Inherits="jQueryChartApplication.jQueryGoogleChart" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="http://code.jquery.com/jquery-1.8.2.js"></script>
<script src="http://www.google.com/jsapi" type="text/javascript"></script>
<script type="text/javascript">
google.load('visualization', '1', { packages: ['corechart'] });
</script>
<script type="text/javascript">
$(function () {
$.ajax({
type: 'POST',
dataType: 'json',
contentType: 'application/json',
url: 'jQueryGoogleChart.aspx/GetChartData',
data: '{}',
success:
function (response) {
drawchart(response.d);
},
error: function () {
alert("Error loading data!");
}
});
})
function drawchart(dataValues) {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Column Name');
data.addColumn('number', 'Column Value');
for (var i = 0; i < dataValues.length; i++) {
data.addRow([dataValues[i].EmployeeCity, dataValues[i].Total]);
}
new google.visualization.PieChart(document.getElementById('myChartDiv')).
draw(data, { title: "Google Chart in Asp.net using jQuery" });
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div id="myChartDiv" style="width: 700px; height: 450px;">
</div>
</form>
</body>
</html>

The following is the aspx.cs code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Web.Services;
namespace jQueryChartApplication
{
public partial class jQueryGoogleChart : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
[WebMethod]
public static List<employeeDetails> GetChartData()
{
DataTable dt = new DataTable();
using (SqlConnection con = new SqlConnection(@"Data Source=MyPC\SqlServer2k8;Integrated Security=true;Initial Catalog=Test"))
{
con.Open();
SqlCommand cmd = new SqlCommand("SELECT Address as Name, COUNT(EMPLOYEECODE) AS Total FROM Employee GROUP BY Address", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
con.Close();
}
List<employeeDetails> dataList = new List<employeeDetails>();
foreach (DataRow dtrow in dt.Rows)
{
employeeDetails details = new employeeDetails();
details.EmployeeCity = dtrow[0].ToString();
details.Total = Convert.ToInt32(dtrow[1]);
dataList.Add(details);
}
return dataList;
}
public class employeeDetails
{
public string EmployeeCity { get; set; }
public int Total { get; set; }
}
}
}