CODEWITHSUNDEEP
c#winforms
Dong Kyun Ham
Dong Kyun Ham

Reputation: 55

OnPaint leaves trails when resizing

I am creating a form with custom border. I wanted to draw my own border using onPaint override. Unfortunately, I get trails of image when I just use the below code.

Does anyone know how to fix this? And yes, I have set the DoubleBuffered to true.

protected override void OnPaint(PaintEventArgs e)
{
  Graphics g = e.Graphics;

  // Background
  g.FillRectangle(new SolidBrush(ColorTranslator.FromHtml("#EFEFF7")), new Rectangle(0, 0, this.Width - 1, this.Height - 1));

  // Outer Borders
  g.DrawImage(Resources.Resource.OuterBorderTopLeft, new Rectangle(0, 0, 13, 13));
  g.DrawImage(Resources.Resource.OuterBorderTopLeft1, new Rectangle(13, 0, 221, 13));
  g.DrawImage(Resources.Resource.OuterBorderTopLeft2, new Rectangle(0, 13, 13, 221));
  g.DrawImage(Resources.Resource.OuterBorderTopRight, new Rectangle(this.Size.Width - 13, 0, 13, 13));
  g.DrawImage(Resources.Resource.OuterBorderTopRight1, new Rectangle(this.Size.Width - 13, 13, 13, 221));
  g.DrawImage(Resources.Resource.OuterBorderTopRight2, new Rectangle(this.Size.Width - 234, 0, 221, 13));
  g.DrawImage(Resources.Resource.OuterBorderBottomLeft, new Rectangle(0, this.Size.Height - 13, 13, 13));
  g.DrawImage(Resources.Resource.OuterBorderBottomLeft1, new Rectangle(0, this.Size.Height - 234, 13, 221));
  g.DrawImage(Resources.Resource.OuterBorderBottomLeft2, new Rectangle(13, this.Size.Height - 13, 221, 13));
  g.DrawImage(Resources.Resource.OuterBorderBottomRight, new Rectangle(this.Size.Width - 13, this.Size.Height - 13, 13, 13));
  g.DrawImage(Resources.Resource.OuterBorderBottomRight1, new Rectangle(this.Size.Width - 234, this.Size.Height - 13, 221, 13));
  g.DrawImage(Resources.Resource.OuterBorderBottomRight2, new Rectangle(this.Size.Width - 13, this.Size.Height - 234, 13, 221));
  base.OnPaint(e);
}

Upvotes: 3

Views: 1038

Answers (1)

LarsTech
LarsTech

Reputation: 81675

Try overriding the resize method, too:

protected override void OnResize(EventArgs e) {
  base.OnResize(e);
  this.Invalidate();
}

or in the constructor, you can add another setting:

public Form1() {
  InitializeComponent();
  this.DoubleBuffered = true;
  this.ResizeRedraw = true;
}

Upvotes: 9

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