Polar and Radar Charts in ASP.Net

Vithal Wadje
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Article

Background

ASP.Net Chart is a powerful control that creates interactive charts. Today we will discuss the Polar and Radar charts of ASP.Net. So let us start to learn about these chart type controls step-by-step.

Now let us learn about the properties of the Polar and Radar charts. A polar and Radar chart type has the following common properties:

AlternetText: Sets the alternate text when the image is not available.
Annotation: Stores the chart annotations.
AntiAliasing: Sets a value that determines whether anti-aliasing is used when text and graphics are drawn.
BackGradientStyle: Sets the orientation for the background gradient for the Chart control. Also determines whether a gradient is used, the default is None.
Backcolor: Sets the background color for a chart, the default color is White.
BackImage: Sets the background image for the chart control.
BackHatchStyle: Sets the hatching style for the chart control, the default is None.
Height: Sets the height for the chart control.
Width: Sets the width for the chart control.
Palette: Sets the style with the color for the chart control, the default style is Chocolate.
PaletteCustomColors: Sets the custom color for the chart control.
Series: Sets the series collection for the chart control.
Legends: Sets the series of legends to the chart.

Now let us show the preceding explanation with a practical example by creating a simple web application.

Step 1

Use the following script to create and insert data into the table for the chart:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[orderdet](
[id] [int] IDENTITY(1,1) NOT NULL,
[Month] [varchar](50) NULL,
[Orders] [int] NULL,
CONSTRAINT [PK_Order Table] PRIMARY KEY CLUSTERED
(
[id] 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
SET IDENTITY_INSERT [dbo].[orderdet] ON
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (1, N'Jan', 0)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (2, N'Feb', 5)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (3, N'March', 20)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (4, N'April', 40)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (5, N'May', 15)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (6, N'Jun', 60)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (7, N'July', 75)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (8, N'Aug', 80)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (9, N'Sep', 85)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (10, N'Oct', 100)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (11, N'Nov', 2)
GO
INSERT [dbo].[orderdet] ([id], [Month], [Orders]) VALUES (12, N'Dec', 90)
GO
SET IDENTITY_INSERT [dbo].[orderdet] OFF
Go

After running the preceding script the records in the table will look as follows:

Step 2

Create a Stored Procedure to fetch the records from the database.

Create procedure [dbo].[GetCharData]
(
@id int =null
)
as
begin
Select Month,Orders from Orderdet
End

Step 3

Create a Web Application. Create the website with:

"Start" - "All Programs" - "Microsoft Visual Studio 2010".
"File" - "New Project" - "C#" - "Empty Website" (to avoid adding a master page).
Provide the project a name such as "PolarAndRadar" or another as you wish and specify the location.
Then right-click on the Solution Explorer and select "Add New Item" then select Default.aspx page.
Drag and Drop a Chart control from the ToolBox onto the Default.aspx page.

Now the Default.aspx source code will be as follows:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="System.Web.UI.DataVisualization.Charting" TagPrefix="asp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Article by Vithal Wadje</title>
</head>
<body bgcolor="blue">
<form id="form1" runat="server">
<h4 style="color: White;">
Article for C#Corner
</h4>
<asp:Chart ID="Chart1" runat="server" BackColor="64, 64, 0"
BackGradientStyle="LeftRight" Height="370px" Palette="None"
PaletteCustomColors="Maroon" Width="370px">
<Series>
<asp:Series Name="Series1" ChartType="Radar">
</asp:Series>
</Series>
<ChartAreas>
<asp:ChartArea Name="ChartArea1" >
</asp:ChartArea>
</ChartAreas>
<BorderSkin BackColor="" PageColor="192, 64, 0" />
</asp:Chart>
</form>
</body>
</html>

Step 4

Create a method to bind the chart control.

Now, open the default.aspx.cs page and create the following function named Bindchart to bind the Chart Control as in the following:

private void Bindchart()
{
connection();
query = "select *from Orderdet";//not recommended this i have written just for example,write stored procedure for security
com = new SqlCommand(query, con);
SqlDataAdapter da = new SqlDataAdapter(query, con);
DataSet ds = new DataSet();
da.Fill(ds);
DataTable ChartData=ds.Tables[0];
//storing total rows count to loop on each Record
string[] XPointMember = new string[ChartData.Rows.Count];
int[] YPointMember = new int[ChartData.Rows.Count];
for (int count = 0; count < ChartData.Rows.Count;count++ )
{
//storing Values for X axis
XPointMember[count] = ChartData.Rows[count]["Month"].ToString();
//storing values for Y Axis
YPointMember[count] = Convert.ToInt32(ChartData.Rows[count]["Orders"]);
}
//binding chart control
Chart1.Series[0].Points.DataBindXY(XPointMember, YPointMember);
//Setting width of line
Chart1.Series[0].BorderWidth = 2;
//setting Chart type
// Chart1.Series[0].ChartType = SeriesChartType.Polar ;
Chart1.Series[0].ChartType = SeriesChartType.Radar;
// Chart1.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;
//Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Enabled = false;
//Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;
con.Close();
}

Now, call the preceding function on page load as in the following

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Bindchart();
}
}

The entire code of the default.aspx.cs page will look as follows:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
using System.Web.UI.DataVisualization.Charting;
public partial class _Default : System.Web.UI.Page
{
private SqlConnection con;
private SqlCommand com;
private string constr, query;
private void connection()
{
constr = ConfigurationManager.ConnectionStrings["getconn"].ToString();
con = new SqlConnection(constr);
con.Open();
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Bindchart();
}
}
private void Bindchart()
{
connection();
query = "select *from Orderdet";//not recommended this i have written just for example,write stored procedure for security
com = new SqlCommand(query, con);
SqlDataAdapter da = new SqlDataAdapter(query, con);
DataSet ds = new DataSet();
da.Fill(ds);
DataTable ChartData=ds.Tables[0];
//storing total rows count to loop on each Record
string[] XPointMember = new string[ChartData.Rows.Count];
int[] YPointMember = new int[ChartData.Rows.Count];
for (int count = 0; count < ChartData.Rows.Count;count++ )
{
//storing Values for X axis
XPointMember[count] = ChartData.Rows[count]["Month"].ToString();
//storing values for Y Axis
YPointMember[count] = Convert.ToInt32(ChartData.Rows[count]["Orders"]);
}
//binding chart control
Chart1.Series[0].Points.DataBindXY(XPointMember, YPointMember);
//Setting width of line
Chart1.Series[0].BorderWidth = 2;
//setting Chart type
// Chart1.Series[0].ChartType = SeriesChartType.Polar ;
Chart1.Series[0].ChartType = SeriesChartType.Radar;
// Chart1.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;
//Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Enabled = false;
Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;
con.Close();
}
}

Now, we have the entire logic to bind the chart from the database, let us run the application. The Polar Chart will look as follows:

The preceding is the Normal Polar chart. Now let us enable the 3D style as in the following:

//Enable 3D
Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;

Now run the application and the Polar 3D chart will look as follows:

Now let us switch to a Radar chart as in the following:

Chart1.Series[0].ChartType = SeriesChartType.Radar;

Now run the application. The Radar chart will look such as follows:

The preceding is the Normal Radar chart. Now let us enable the 3D style as in the following:

//Enable 3D
Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;

Now run the application. The Radar Chart will look as follows:

Now change the background style then the chart will look as follows:

Now from all the preceding explanations we saw how to create and use Polar and Radar charts.

Notes

Download the Zip file from the attachment for the full source code of the application.
Change the connection string in the web.config file to specify your server location.

Summary

My next article explains another chart type of ASP.Net. I hope this article is useful for all readers, if you have any suggestion then please contact me including beginners also.

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