c#圆角

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其他类型类似

private void ListBoxDrawTest(ListBox lb, int len)

{

Graphics g=lb.CreateGraphics();

Rectangle rect=lb.ClientRectangle;

GraphicsPath path = new GraphicsPath();

path.AddArc(rect.Left, rect.Top, 2 * len, 2 * len, 180, 90);

path.AddLine(rect.Left + len, rect.Top, rect.Right - len, rect.Top);

path.AddArc(rect.Right - 2 * len, rect.Top, 2 * len, 2 * len, 270, 90);

path.AddLine(rect.Right, rect.Top + len, rect.Right, rect.Bottom - len);

path.AddArc(rect.Right - 2 * len, rect.Bottom - 2 * len, 2 * len, 2 * len, 0, 90);

path.AddLine(rect.Left + len, rect.Bottom, rect.Right - len, rect.Bottom);

path.AddArc(rect.Left, rect.Bottom - 2 * len, 2 * len, 2 * len, 90, 90);

path.AddLine(rect.Left, rect.Top + len, rect.Left, rect.Bottom - len);

lb.Region = new Region(path);

//g.DrawPath(Pens.Black, path);

}