Background
Sometimes we need to show data in a Line Chart, so by considering that requirement and to introduce the ASP.Net Line and Spline Chart controls I have decided to write this article.
Let us learn about the ASP.Net chart types Line and Spline that provide a powerful UI and design quality. So let us start to learn about these chart type controls step-by-step. All the charts are in the System.Web.UI.DataVisualization.Charting namespace.
Chart data is represented using the following points:
- X Axis: the horizontal line of the chart termed the X axis
- Y Axis: the vertical line of the chart termed the Y axis
Step 1: Create a table for the chart data
Now before creating the application, let us create a table named orderdet in a database from where we show the records in a chart, the table has the following script (shown in the following image):
- USE [CBS]
- GO
-
- /****** Object: Table [dbo].[QuarterwiseSale] Script Date: 19-12-2014 00:49:50 ******/
- SET ANSI_NULLS ON
- GO
-
- SET QUOTED_IDENTIFIER ON
- GO
-
- SET ANSI_PADDING ON
- GO
-
- CREATE TABLE [dbo].[QuarterwiseSale](
- [id] [int] IDENTITY(1,1) NOT NULL,
- [Quarter] [varchar](50) NULL,
- [SalesValue] [money] NULL,
- CONSTRAINT [PK_QuarterwiseSale] 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
Now the design will look such as:
Now insert some records as listed in the following image into the table:
I hope you have the same type of table and records as above.
Step 2: Create Web Application
Now create the project with:
- "Start" - "All Programs" - "Microsoft Visual Studio 2010".
- "File" - "New Project" - "C#" - "Empty Project" (to avoid adding a master page).
- Provide the project a name such as LineAndSpline or another as you wish and specify the location.
- Then right-click on Solution Explorer and select "Add New Item" then select Default.aspx page.
- Drag and Drop Chart control from 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, 0, 0"
- BackGradientStyle="LeftRight" Height="350px" Palette="None"
- PaletteCustomColors="192, 0, 0" Width="350px">
- <Series>
- <asp:Series Name="Series1">
- </asp:Series>
- </Series>
- <ChartAreas>
- <asp:ChartArea Name="ChartArea1" >
- </asp:ChartArea>
- </ChartAreas>
- <BorderSkin BackColor="" PageColor="192, 64, 0" />
- </asp:Chart>
-
-
- </form>
- </body>
- </html>
Step 3: Create method to bind the chart control
The Important and complex thing is to bind the chart control properly, because charts exist in a nested series so it's a problem to identify how to set the values.
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";
- com = new SqlCommand(query, con);
- SqlDataAdapter da = new SqlDataAdapter(query, con);
- DataSet ds = new DataSet();
- da.Fill(ds);
- DataTable ChartData=ds.Tables[0];
-
- string[] XPointMember = new string[ChartData.Rows.Count];
- int[] YPointMember = new int[ChartData.Rows.Count];
- for (int count = 0; count < ChartData.Rows.Count;count++ )
- {
-
- XPointMember[count] = ChartData.Rows[count]["Month"].ToString();
-
- YPointMember[count] = Convert.ToInt32(ChartData.Rows[count]["Orders"]);
- }
-
- Chart1.Series[0].Points.DataBindXY(XPointMember, YPointMember);
-
- Chart1.Series[0].BorderWidth = 1;
-
- Chart1.Series[0].ChartType = SeriesChartType.Line ;
-
-
-
-
- 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";
- com = new SqlCommand(query, con);
- SqlDataAdapter da = new SqlDataAdapter(query, con);
- DataSet ds = new DataSet();
- da.Fill(ds);
-
- DataTable ChartData=ds.Tables[0];
-
-
- string[] XPointMember = new string[ChartData.Rows.Count];
- int[] YPointMember = new int[ChartData.Rows.Count];
-
- for (int count = 0; count < ChartData.Rows.Count;count++ )
- {
-
- XPointMember[count] = ChartData.Rows[count]["Month"].ToString();
-
- YPointMember[count] = Convert.ToInt32(ChartData.Rows[count]["Orders"]);
- }
-
- Chart1.Series[0].Points.DataBindXY(XPointMember, YPointMember);
-
-
- Chart1.Series[0].BorderWidth = 1;
-
- Chart1.Series[0].ChartType = SeriesChartType.Line ;
-
-
-
-
- con.Close();
-
- }
- }
Now, we have the entire logic to bind the chart from the database, let us run the application. The chart will look such as follows:
We can have GridLines of the chart that sometimes need to be hidden, if you want to hide them then uncomment the following code as:
- Chart1.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;
- Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Enabled = false;
Now run the application, the chart will look as follows:
We can also change the thickness (width) of the lines as in the following:
-
- Chart1.Series[0].BorderWidth = 1;
Now let's look at the Graph.
Now let us switch to a Spline chart as in the following:
-
- Chart1.Series[0].ChartType = SeriesChartType.Spline ;
Now run the application and the Funnel type chart will look as follows:
The preceding is the Normal Spline chart. Now let us enable the 3D style as in the following:
- Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;
Now run the application and the chart will look as follows:
Now from all the preceding explanations we saw how to create and use a Line and Spline chart.
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.