Thank you Narcís.
But if I need to draw this digital with analog single like the picture.
I can't use tChart1.Axes.Bottom.SetMinMax.
Is HorizBar must start at left or not? How can I do?

Thank you for reply. It works.
But HorizBar always start at the left axes.
Could I make HorizBar start at the middle like the picture?

Thank you Narcís.
But I need to draw like hat.
It should have underline not a rectangle.
like this

Sorry, I don't know how to draw like the picture use horizontal bar series.
Can you give me some example?

How can I draw like this picture
http://img507.imageshack.us/img507/677/46495697wc1.png

I use Area to draw but Area is hard to use.
I also draw two line and set width but can't do very well.
Is there other Object easy to use?

I draw a fastline in webchart.
When user zoom the webchart, how can I get the new point index.

Example:
If this fastline has 100 point.
And when user zoom the webchart(if user select index 30 to 40).
Webchart will show new scale in point 30 to 40.
How can I know user zoom index 30 to 40.

Narcís, thank you very much. It really helps me.

I stuck this function a little time.

The resolve is so easy.

I need to study in TeeChart. And it is a good 'Object'.

Please see the step 1.Web page load 2.Zoom the WebChart 3.Click Button1 the WebChrt.Series[0] will change value, but WebChart still in the step 2 zoom scale. My problem is when I already zoomed a webchart, then I update webchart data. But the webchart still in last zoom scale. When I update webchart...

Thank you Narcís,
I knew there is a Zoom sample in file WebAppZoomChart.aspx.
But I can't find any thing about DeterminePostBackModebout int WebAppZoomChart.aspx.

There is a onhelp SetCurrentZoom method. This is the sample code. private void Page_Load(object sender, System.EventArgs e) { MemoryStream tmpChart; if (Session["ch1"]==null) { WebChart1.Chart[0].FillSampleValues(); tmpChart=new MemoryStream(); WebChart1.Chart.Export.Template.Save(tmpChart); //save ...

Thank you Narcís:
This code is work. Now I understand your mean.
Export can't Save datetime format string.
We should write double first then transfer to datetime string.
Thank you angan!!

Hi Narcís:
Thank you for reply.
Before I post this problem, I already readed that article.
But I still don't understand how to export datetime text format file.
Will you write some sample to me?
Thank you very much.

p.s I use WebChart

I use TeeChart.NET 2.0. I used WebChart and set Chart.XValues.DateTime = true, x value show in DateTime. But when I use Export textformat, the xvalue in file always is float. How can I to write datetime text in file? My code: string filename = Server.MapPath("~/App_Data/chart.txt"); Steema.TeeChart....