How can I plot a graph on the screen?

[elemis]

Hi, do we have pixels that we can set in order to plot an x-y graph
on a form ?

 

[Guest]

Hi elemis

You need to have a look at the OnPaint method - here's an example in VB.NET
that draws a diagonal line.

Protected Overrides Sub OnPaint(ByVal e As
System.Windows.Forms.PaintEventArgs)
e.Graphics.DrawLine(Pens.Black, 100, 100, 200, 200)
End Sub

But you would probably be better off buying a graphing control, or
developing your own rather than putting all your graphing code into the Form
Paint...

HTH

Nigel Armstrong

 

[Guest]

And to follow up my own post, make sure you call MyBase.OnPaint(e) before
your own painting code.

Nigel Armstrong

 

[elemis]

This is great, any ideas how a generate a paint event to refresh what
I am drawing?

 

[Guest]

Try the Invalidate() method.

HTH

Nigel Armstrong

 

[Bob]

Take a look at XYGraph from http://www.componentXtra.com. The basic version is free.