Draw Lines on FormLoad??? [RESOLVED]

[Daywalker46410]

I am using the following code to draw a line (this will ultimately become a table):

Private Sub DrawLines()
        Dim g As Graphics
        Dim PenColor As New Pen(Color.Black)
        Dim APoint As New Point(30, 350)
        Dim BPoint As New Point(500, 350)
        g = Me.CreateGraphics
        g.DrawLine(PenColor, APoint, BPoint)
End Sub

This works fine as long as I call the sub from a click event, or a text change, etc. If I call it from a Form Load or Form Activate command, it won't draw the lines. I know the code is being executed because I put a MessageBox in there for testing, but the line just isn't being drawn. Any idea what's going on and how to fix it?

Thanks in advance

[pax]

Hi.

The lines are actually drawn ok. But after the call to the sub, when Form_Load exits, the form is redrawn, erasing your lines.

Try drawing the lines from a button click again. Move the form halfways out of sight and then back in. You'll notice that half of your lines are gone.

This is because your lines are not part of the form, so when the form redraws, you lines are deleted.

To have your lines visible at all times, draw the lines in the Form_Paint event instead. Then use e.Graphics instead if CreateGraphics.

[unisse]

Well this became almost a double, since I went to get coffee, while typing it... =)

Orig. post enclosed below:

Perhaps if you put your code in event: Form_Paint instead?
At least it worked when I tried it.

Im guessing the problem is that, in Form_Load the form isn't "painted" yet, which when you draw your line, and then Form_Load completes and "over-draws" your line?

Any one else that think differently or knows for sure is welcome to comment. =)

[AFterlife]

Originally posted by Daywalker46410
I am using the following code to draw a line (this will ultimately become a table):

Private Sub DrawLines()
        Dim g As Graphics
        Dim PenColor As New Pen(Color.Black)
        Dim APoint As New Point(30, 350)
        Dim BPoint As New Point(500, 350)
        g = Me.CreateGraphics
        g.DrawLine(PenColor, APoint, BPoint)
End Sub

This works fine as long as I call the sub from a click event, or a text change, etc. If I call it from a Form Load or Form Activate command, it won't draw the lines. I know the code is being executed because I put a MessageBox in there for testing, but the line just isn't being drawn. Any idea what's going on and how to fix it?

Thanks in advance

Did you try putting that in the form's paint event?
Edit: I didnt see Pax already had it.

[Daywalker46410]

That got it. Thanks, guys.