Gallery
JS Axis Click Value
<%@ Page Language="C#" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dnc" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING" %>
<%@ Import Namespace="System.Drawing" %>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Demonstrates how to programatically get the axis value positions when the chart area is clicked.
// A client side formatting function is also used in JS.
Chart.Size = "600x350";
Chart.Title = "Axis Value From Click";
Chart.TempDirectory = "temp";
Chart.Debug = false;
Chart.TitleBox.Position = TitleBoxPosition.FullWithLegend;
Chart.DefaultSeries.Type = SeriesType.Line;
Chart.JS.Enabled = true;
Chart.JS.Buttons.EnablePrintButton = false;
Chart.JS.Buttons.EnableExportButton = false;
Chart.ChartArea.Hotspot.Attributes.Custom.Add("click", "js:writeInfo");
Chart.ChartArea.Label.Text = "Click on the chart area to get the corresponding axis values";
Chart.YAxis.FormatString = "C";
// *DYNAMIC DATA NOTE*
// This sample uses random data to populate the chart. To populate
// a chart with database data see the following resources:
// - Use the getLiveData() method using the dataEngine to query a database.
// - Help File > Getting Started > Data Tutorials
// - DataEngine Class in the help file
// - Sample: features/DataEngine.aspx
SeriesCollection mySC = getRandomData();
// Add the random data.
Chart.SeriesCollection.Add(mySC);
}
SeriesCollection getRandomData()
{
Random myR = new Random(1);
SeriesCollection SC = new SeriesCollection();
DateTime dt = new DateTime(2021, 1, 1);
Series s = new Series("Series 1" );
for (int b = 1; b < 5; b++)
{
Element e = new Element();
e.XDateTime = dt = dt.AddDays(1);
e.YValue = myR.Next(50);
s.Elements.Add(e);
}
SC.Add(s);
return SC;
}
SeriesCollection getLiveData()
{
DataEngine de = new DataEngine("ConnectionString goes here");
de.ChartObject = Chart; // Necessary to view any errors the dataEngine may throw.
de.SqlStatement = "SELECT XAxisColumn, YAxisColumn FROM ....";
return de.GetSeries();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>.netCHARTING Sample</title>
<script type="text/javascript">
function writeInfo(e) {
var str = '<b>Axis values at clicked position:</b><br/>X: ' + JSC.formatString(new Date(e.xAxis[0].value), "F");
str += '<br/>Y: ' + JSC.formatString(e.yAxis[0].value,"c");
document.querySelector('#status').innerHTML = str;
}
</script>
</head>
<body>
<div align="center">
<dnc:Chart ID="Chart" runat="server" />
</div>
<div id="status"></div>
</body>
</html>
<%@ Page Language="vb" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dnc" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING" %>
<%@ Import Namespace="System.Drawing" %>
<script runat="server">
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Demonstrates how to programatically get the axis value positions when the chart area is clicked.
' A client side formatting function is also used in JS.
Chart.Size = "600x350"
Chart.Title = "Axis Value From Click"
Chart.TempDirectory = "temp"
Chart.Debug = False
Chart.TitleBox.Position = TitleBoxPosition.FullWithLegend
Chart.DefaultSeries.Type = SeriesType.Line
Chart.JS.Enabled = True
Chart.JS.Buttons.EnablePrintButton = False
Chart.JS.Buttons.EnableExportButton = False
Chart.ChartArea.Hotspot.Attributes.Custom.Add("click", "js:writeInfo")
Chart.ChartArea.Label.Text = "Click on the chart area to get the corresponding axis values"
Chart.YAxis.FormatString = "C"
' *DYNAMIC DATA NOTE*
' This sample uses random data to populate the chart. To populate
' a chart with database data see the following resources:
' - Use the getLiveData() method using the dataEngine to query a database.
' - Help File > Getting Started > Data Tutorials
' - DataEngine Class in the help file
' - Sample: features/DataEngine.aspx
Dim mySC As SeriesCollection = getRandomData()
' Add the random data.
Chart.SeriesCollection.Add(mySC)
End Sub
Function getRandomData() As SeriesCollection
Dim myR As Random = New Random(1)
Dim SC As SeriesCollection = New SeriesCollection()
Dim dt As DateTime = New DateTime(2021, 1, 1)
Dim s As Series = New Series("Series 1")
For b As Integer = 1 To 4
Dim e As Element = New Element()
dt = dt.AddDays(1)
e.XDateTime = dt
e.YValue = myR.Next(50)
s.Elements.Add(e)
Next b
SC.Add(s)
Return SC
End Function
Function getLiveData() As SeriesCollection
Dim de As DataEngine = New DataEngine("ConnectionString goes here")
de.ChartObject = Chart ' Necessary to view any errors the dataEngine may throw.
de.SqlStatement = "SELECT XAxisColumn, YAxisColumn FROM ...."
Return de.GetSeries()
End Function
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>.netCHARTING Sample</title>
<script type="text/javascript">
function writeInfo(e) {
var str = '<b>Axis values at clicked position:</b><br/>X: ' + JSC.formatString(new Date(e.xAxis[0].value), "F");
str += '<br/>Y: ' + JSC.formatString(e.yAxis[0].value,"c");
document.querySelector('#status').innerHTML = str;
}
</script>
</head>
<body>
<div align="center">
<dnc:Chart ID="Chart" runat="server" />
</div>
<div id="status"></div>
</body>
</html>
- Sample FilenameJsAxisClickValue.aspx
- Version8.0
- Uses DatabaseNo