Steema Central

Dear Sir

How to I dynamic adding webchart into aspx page?
Protected Sub Page_Load(ByVal sender As Object, ByVal e As system.EventArgs) Handles Me.Load
Dim WebChart1 As New Steema.TeeChart.Web.WebChart
form1.Controls.Add(WebChart1)
end sub

Above the code occurs a error
[NullReferenceException: Object reference not set to an instance of an object.]
Steema.TeeChart.Web.WebChart.CreatePictureFile(HtmlTextWriter writer) +418
Steema.TeeChart.Web.WebChart.Render(HtmlTextWriter output) +10
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +59
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +68
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +37
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
System.Web.UI.Page.Render(HtmlTextWriter writer) +26
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1896


Thank
Yong

Dear Sir

I search around the forum, I found some example to create the webchart dynamic, But i'm not understand how to do it...

example on page_load

create web chart and chart setting....

Response.Write("<tchart:WebChart id=\"WebChart1\" style=\"Z-INDEX: 104; LEFT: 56px; POSITION: absolute; TOP: 56px\" runat=\"server\"Width=\"760px\" Height=\"448px\" TempChart=\"File\" ClickedY=\"0\" ClickedX=\"0\" GetChartFile=\"GetChart.aspx\" AutoPostback=\"False\" Config=\"AAEA.....Cut it, cause too long"></tchart:WebChart>");


But I'm still not able to see the chart show in the aspx page and I also want to know whether the javascript event able to work. example as below the code

sub GetHTMLMap(....)
e.PointPolygon.Attributes = "onclick=alert('dd');"
end sub

Hello!

You can add webcontrols to webforms dynamically using the techniques in this MSDN article:
http://msdn2.microsoft.com/en-us/librar ... s.80).aspx

But I'm still not able to see the chart show in the aspx page and I also want to know whether the javascript event able to work. example as below the code

I believe we had already resolved this problem in this thread:
http://www.teechart.net/support/viewtopic.php?t=6314

Dear Sir

Ya.. It work already....

anyway, Thank your help

Yong

Hi, I'm try to do the same. I'm trying to use the following code. But I just get a chart to show but with no data.

Any ideas. Do i need to redraw the chart some how?

Cheers?

Steema.TeeChart.Web.WebChart newWebChart = new Steema.TeeChart.Web.WebChart();
newWebChart.Width = 800;
newWebChart.Height = 500;
newWebChart.ID = "newWebChart";
//newWebChart.Style. = "Z-INDEX: 107; LEFT: 24px; POSITION: absolute; TOP: 60px;";
newWebChart.Config = "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newWebChart.TempChart = Steema.TeeChart.Web.TempChartStyle.Session;
newWebChart.AutoPostback = true;
newWebChart.GetChartFile = "GetChart.aspx";

//thePage.Controls.Add(newWebChart);

Steema.TeeChart.Styles.FastLine fastLine1;

fastLine1 = new Steema.TeeChart.Styles.FastLine();
newWebChart.Chart.Series.Add(fastLine1);
double[] yValues = { 10, 15, 20, 2, 23, 63, 33, 1, 33, 77, 94, 65, 45, 23, 32, 4, 54, 2, 18, 21, 80, 67, 45, 32, 3, 10, 56, 13, 52, 23, 72, 66, 32, 54, 74, 21, 86, 15 };
fastLine1.Add(yValues);

// Set some nulls
fastLine1.SetNull(13);
fastLine1.SetNull(25);
fastLine1.SetNull(40);

fastLine1.IgnoreNulls = true;
fastLine1.Stairs = true;

// Apply palette
Steema.TeeChart.Themes.ColorPalettes.ApplyPalette(newWebChart.Chart, 7);

thePage.Controls.Add(newWebChart);

Ok i've kind of fixed it. But it is a bit annoying.

If you add the series to the chart after adding the webchart to the div then it works.

IE last few line of code are changed to

newWebChart.Chart.Series.Add(fastLine1);

thePage.Controls.Add(newWebChart);

Hi keynetix,

Your code also worked fine for me here commenting in the line setting newWebChart.Config.