ASP.Net Charts Tutorial

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ASP.Net chart object is a versatile control which can produce elegant graphs to cover plenty of real-life situations.
It is within the Namespace, System.Web.UI.DataVisualization.Charting;
This tutorial shows you the true potential of the chart object, when it is used with Ajax. Just keep an eye on the response time, when you choose to draw.

Pie Charts

Enter the above values and click the Draw button.

Maths	Physics	Econ:	IT	Geography


Slice it?

The .aspx page for the above is as follows:

<asp:Chart ID="PieChart"CssClass="imgforcontent" runat="server" ImageStorageMode="UseImageLocation" ImageLocation="~/aspchart">
<Series>
<asp:Series Name="For_Pi">
</asp:Series>
</Series>
<ChartAreas>
<asp:ChartArea Name="For_Pi">
</asp:ChartArea>
</ChartAreas>
</asp:Chart>

<asp:Table ID="Pie" runat="server">
<asp:TableHeaderRow>
<asp:TableHeaderCell>Maths</asp:TableHeaderCell>
<asp:TableHeaderCell>Physics</asp:TableHeaderCell>
<asp:TableHeaderCell>Biology</asp:TableHeaderCell>
<asp:TableHeaderCell>IT</asp:TableHeaderCell>
<asp:TableHeaderCell>English</asp:TableHeaderCell>
</asp:TableHeaderRow>
<asp:TableRow>
<asp:TableCell><asp:TextBox Width="50px" CssClass="centralized" ID="txtMaths" runat="server"></asp:TextBox></asp:TableCell>
<asp:TableCell><asp:TextBox Width="50px" CssClass="centralized" ID="txtPhysics" runat="server"></asp:TextBox></asp:TableCell>
<asp:TableCell><asp:TextBox Width="50px" CssClass="centralized" ID="txtBiology" runat="server"></asp:TextBox></asp:TableCell>
<asp:TableCell><asp:TextBox Width="50px" CssClass="centralized" ID="txtIT" runat="server"></asp:TextBox></asp:TableCell>
<asp:TableCell><asp:TextBox Width="50px" CssClass="centralized" ID="txtEnglish" runat="server"></asp:TextBox></asp:TableCell>
</asp:TableRow>
<asp:TableRow><asp:TableCell ColumnSpan="5" CssClass="centralized"><asp:Button ID="btnPie" onclick="btnPie_Click" runat="server" Text="Click and Draw" />
<asp:Button ID="btnPieClear" onclick="btnpieclear" runat="server" Text="Clear" />
</asp:TableCell></asp:TableRow>
<asp:TableRow><asp:TableCell ColumnSpan="5" CssClass="centralized"><asp:CheckBox ID="chkPie" AutoPostBack="true" Text="Cut a piece?" OnCheckedChanged="onchkclick" runat="server" />
</asp:TableCell></asp:TableRow>
</asp:Table>

The corresponding C# code in .aspx.cs is as follows:

// Page Load event
protected void Page_Load(object sender, EventArgs e)
{
Chart1.Series.Clear();
// for the pie chart
double[] yval = { 70, 55, 68, 45, 30 };
// Initialize an array of strings
string[] xval = { "Maths", "Physics", "Biology", "IT", "English" };
// Bind the double array to the Y axis points of the Default data series
PieChart.Series[0].ChartType = SeriesChartType.Pie;
PieChart.Series[0].Points.DataBindXY(xval, yval);
PieChart.Series[0]["Pie"] = "30";
// Explode data point with label "Italy"
PieChart.Series[0].Points[4]["Exploded"] = "false";
// Enable 3D
PieChart.ChartAreas[0].Area3DStyle.Enable3D = true;
// Disable the Legend
//Chart1.Legends[0].Enabled = false;
}
// Draw the pie chart
protected void btnPie_Click(object sender, EventArgs e)
{
if (txtMaths.Text == "" || txtPhysics.Text == "" || txtBiology.Text == "" || txtIT.Text == "" || txtEnglish.Text == "")
{
btnPie.Text="Please enter values";
}
else
{
string[] xval = { "Maths", "Physics", "Biology", "IT", "English" };
double[] yval = { Convert.ToDouble(txtMaths.Text), Convert.ToDouble(txtPhysics.Text), Convert.ToDouble(txtBiology.Text), Convert.ToDouble(txtIT.Text), Convert.ToDouble(txtEnglish.Text) };
//double[] yval = { 90, 25, 88, 55, 60 };
PieChart.Series[0].ChartType = SeriesChartType.Pie;
PieChart.Series[0].Points.DataBindXY(xval, yval); PieChart.Series[0]["Pie"] = "30";
//PieChart.Series[0].Points[4]["Exploded"] = "true";
PieChart.ChartAreas[0].Area3DStyle.Enable3D = true;
chkPie.Checked = false;
}
}
// Clear the pie chart
protected void btnpieclear(object sender, EventArgs e)
{
txtMaths.Text = "";
txtPhysics.Text = "";
txtBiology.Text = "";
txtIT.Text = "";
txtEnglish.Text = "";
chkPie.Checked = false;
btnPie.Text = "Click and Draw";
}
// Slice the pie or reverse it
protected void onchkclick(object sender, EventArgs e)
{
Random rnd = new Random();
if (chkPie.Checked)
{
piedraw();
PieChart.Series[0].Points[rnd.Next(0, 4)]["Exploded"] = "true";
chkPie.Checked = true;
}
else
{
piedraw();
PieChart.Series[0].Points[rnd.Next(0, 4)]["Exploded"] = "false";
}
}
// Draw the pie
protected void piedraw()
{
if (txtMaths.Text == "" || txtPhysics.Text == "" || txtBiology.Text == "" || txtIT.Text == "" || txtEnglish.Text == "")
{
double[] yval = { 72, 72, 72, 72, 72 };
string[] xval = { "Maths", "Physics", "Biology", "IT", "English" };
PieChart.Series[0].ChartType = SeriesChartType.Pie;
PieChart.Series[0].Points.DataBindXY(xval, yval);
PieChart.Series[0]["Pie"] = "30";
//PieChart.Series[0].Points[4]["Exploded"] = "true";
PieChart.ChartAreas[0].Area3DStyle.Enable3D = true;
chkPie.Checked = false;
}
else
{
double[] yval = { Convert.ToDouble(txtMaths.Text), Convert.ToDouble(txtPhysics.Text), Convert.ToDouble(txtBiology.Text), Convert.ToDouble(txtIT.Text), Convert.ToDouble(txtEnglish.Text) };
string[] xval = { "Maths", "Physics", "Biology", "IT", "English" };
PieChart.Series[0].ChartType = SeriesChartType.Pie;
PieChart.Series[0].Points.DataBindXY(xval, yval);
PieChart.Series[0]["Pie"] = "30";
//PieChart.Series[0].Points[4]["Exploded"] = "true";
PieChart.ChartAreas[0].Area3DStyle.Enable3D = true;
chkPie.Checked = false;
}
}

Normal Distribution Calculator

The days of annoying tables are over; the values of probability are just a click away. Just enter the upper 'Z' value in the box.

Enter Z value here:

The .aspx page for the above is as follows:

<asp:Chart ID="Chart1" runat="server" BackColor="lemonchiffon"
BorderlineColor="Beige" BorderSkin-BackColor="Beige" width="400px"
Height="300px" ImageStorageMode="UseImageLocation" ImageLocation="~/aspchart"
BackImageAlignment="BottomLeft" BackImageTransparentColor="128, 255, 255">
<Series>
<asp:Series Name="Series1">
</asp:Series>
</Series>
<ChartAreas>
<asp:ChartArea Name="ChartArea1">
</asp:ChartArea>
</ChartAreas>
<BorderSkin SkinStyle="Emboss" />
</asp:Chart>

The .aspx page for the above is as follows:

protected void btnNormalDistribution_Click(object sender, EventArgs e)
{
Chart1.Series.Clear();
if (string.IsNullOrEmpty(TextBox2.Text))
{
lblNormalDistribution.Text = "Please enter the data";
return;
}
double i = 0;
Series series = new Series("Spline");
series.ChartType = SeriesChartType.SplineArea;
series.BorderWidth = 2;
series.ShadowOffset = 1;
// Add series into the chart's series collection
double f = Math.Sqrt(1 / 2 * Math.PI);
double x = Convert.ToDouble(TextBox2.Text);
double T = 1 / (1 + 0.2316419 * Math.Abs(x));
double D = 0.3989423 * Math.Exp(-x * x / 2);
double Prob = D * T * (0.3193815 + T * (-0.3565638 + T * (1.781478 + T * (-1.821256 + T * 1.330274))));
lblNormalDistribution.Text = "P(0<= Z <= " + x + " ) = " + Math.Round(10000 * (0.5 - Prob)) / 10000;
for (i = 0; i <= x; i++)
{
series.Points.AddXY(i, Math.Sqrt(1 / (2 * Math.PI)) * Math.Exp(-Math.Pow(i, 2) / 2));
}
Chart1.ChartAreas[0].AxisY.Minimum = 0;
Chart1.ChartAreas[0].AxisY.Maximum = 0.5;
Chart1.ChartAreas[0].AxisX.Minimum = -5;
Chart1.ChartAreas[0].AxisX.Maximum = 5;
Chart1.ChartAreas[0].AxisX.MajorGrid.Interval = 1;
Chart1.ChartAreas[0].AxisX.MajorTickMark.Interval = 1;
Chart1.ChartAreas[0].AxisY.MajorGrid.Interval = 0.1;
Chart1.ChartAreas[0].AxisY.MajorTickMark.Interval = 0.1;
Chart1.ChartAreas[0].AxisY.LineColor = System.Drawing.Color.Red;
Chart1.ChartAreas[0].AxisX.LineColor = System.Drawing.Color.Red;
Chart1.Series.Add(series);
}
protected void btnClearNormal_Click(object sender, EventArgs e)
{
lblNormalDistribution.Text = "";
TextBox2.Text = "";
}