C# painting lines and rezising the form

Question

5.00/5 (1 vote)

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This is my code

private void panel1_Paint(object sender, PaintEventArgs e)
{
   float[] dashValues = { 2, 5, 2, 5 };
   Pen blackPen = new Pen(Color.Black, 2);
   blackPen.DashPattern = dashValues;
   e.Graphics.DrawLine(blackPen, new Point(panel1.Width, panel1.Height),
                       new Point(0, panel1.Height));
}

and panel1 is anchored left,right

this is my problem, when i size this form very slowly the dashes become very close together and don't leave a gap like it is supposed to

for example when re-sizing
what is meant to look like: - - - -

it ends up looking like: ----

Posted 24-Apr-12 3:24am

C.CoderCreator

Updated 24-Apr-12 3:52am

Leonardo Paneque

v2

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2 solutions

Solution 2

Why are you writing this code in panel1_Paint method?

If there is no any specific reason then you should write your code in form_Load it self. This will stop calling panel1_Paint method every time you will re-size your form.

Thanks
Rushi

Posted 24-Apr-12 5:38am

Joshi, Rushikesh

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Stryder_1 · Accepted Answer · 2012-04-24T04:02:00

Solution 1

You need to clear your previous dash line that you drew.

Try adding this code to the resize method of the panel:

private void panel1_Resize(object sender, EventArgs e)
{
    panel1.Invalidate();
}

Posted 24-Apr-12 4:02am

Stryder_1