I have been unable to get the webchart events to fire when clicking. I've created a simple asp.net solution on github to illustrate.
I've read and followed the documentation at https://steema.com/docs/teechart/net/tu ... ations.htm
to the tee.
The only event that seems to be invoked is Afterdraw. I can't get ClickBackground, ClickSeries or ClickLegend to trigger.
Default.aspx
Code: Select all
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TeeChartEventTest._Default" %>
<%@ Register Assembly="TeeChart" Namespace="Steema.TeeChart.Web" TagPrefix="tchart" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<div class="row">
<div class="col-md-12">
<h2>TeeChart Demo</h2>
<p>
<tchart:WebChart ID="WebChart1" AutoPostback="True" TempChart="Httphandler" runat="server" OnAfterDraw="WebChart1_AfterDraw" OnClickBackground="WebChart1_ClickBackground" OnClickSeries="WebChart1_ClickSeries" GetChartFile="" Height="300px" Width="400px" OnClickLegend="WebChart1_ClickLegend" />
</p>
</div>
</div>
</asp:Content>Code: Select all
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using Steema.TeeChart.Styles;
using System.Drawing;
namespace TeeChartEventTest
{
public partial class _Default : Page
{
private int clickedX;
private int clickedY;
private string msgText;
protected void Page_Load(object sender, EventArgs e)
{
Steema.TeeChart.Chart ch1 = WebChart1.Chart;
MemoryStream tmpChart = new MemoryStream();
if (Session["ch3"] == null)
{
//setup Chart
if (ch1.Series.Count < 2)
{
ch1.Series.Add(new Steema.TeeChart.Styles.Points());
ch1.Series.Add(new Steema.TeeChart.Styles.Points());
}
//this.seriesHotspot1 = new Steema.TeeChart.Tools.SeriesHotspot(ch1);
((Points)ch1.Series[0]).Pointer.Pen.Visible = false;
((Points)ch1.Series[1]).Pointer.Pen.Color = Color.FromArgb(79, 79, 255);
ch1.Series[0].Color = Color.FromArgb(255, 199, 26);
ch1.Series[1].Color = Color.FromArgb(106, 106, 255);
ch1.Series[0].FillSampleValues(6);
ch1.Series[1].FillSampleValues(6);
//export Chart to a MemoryStream template
ch1.Export.Template.Save(tmpChart);
//save template to a Session variable
Session.Add("ch3", tmpChart);
}
else
{
//retrieve the session stored Chart
tmpChart = (MemoryStream)Session["ch3"];
//set the Stream position to 0 as the last read/write
//will have moved the position to the end of the stream
tmpChart.Position = 0;
//import saved Chart
ch1.Import.Template.Load(tmpChart);
}
}
// Huh???
protected void WebChart1_ClickBackground(object sender, ImageClickEventArgs e)
{
Steema.TeeChart.Chart tChart = ((Steema.TeeChart.Web.WebChart)sender).Chart;
//int index = WebChart2.Chart.Legend.Clicked(e.X, e.Y);
//event triggered when any point on the Chart is clicked. If the ClickSeries event is active
//it will take precedence when a Series is clicked.
clickedX = e.X;
clickedY = e.Y;
msgText = "Clicked background\n\rX:" + tChart.Axes.Bottom.CalcPosPoint(clickedX).ToString("#0.00")
+ ", Y:" + tChart.Axes.Left.CalcPosPoint(clickedY).ToString("#0.00");
}
protected void WebChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
{
if (clickedX > 0)
{
g.Font.Bold = true;
g.Font.Color = Color.Blue;
g.TextOut(clickedX, clickedY, msgText);
}
}
// HUH??
protected void WebChart1_ClickSeries(object sender, Series s, int valueIndex, EventArgs e)
{
Steema.TeeChart.Chart tChart = ((Steema.TeeChart.Web.WebChart)sender).Chart;
clickedX = s.CalcXPos(valueIndex);
clickedY = s.CalcYPos(valueIndex);
msgText = "Series: " + tChart.Series.IndexOf(s).ToString() + "\n\rValue: " + s.YValues[valueIndex].ToString("#0.00");
}
// HUH??
protected void WebChart1_ClickLegend(object sender, ImageClickEventArgs e)
{
}
}
}The full code can be found at https://github.com/burningza/TeechartEventTest
Please help
