How to draw a rounded rectangle in C #

Question

I use this code to create a rounded rectangle. But he only draws the upper left and right corners of the rectanlge, moreover, he does not fill the rectangle at the bottom. How to make it filled and filled. What changes should I make?

public static Bitmap DrawRoundedRectangle(Bitmap Image, Color BoxColor, int XPosition, int YPosition, int Height, int Width, int CornerRadius) { Bitmap NewBitmap = new Bitmap(Image, Image.Width, Image.Height); using (Graphics NewGraphics = Graphics.FromImage(NewBitmap)) { using (Pen BoxPen = new Pen(BoxColor)) { using (GraphicsPath Path = new GraphicsPath()) { Path.AddLine(XPosition + CornerRadius, YPosition, XPosition + Width - (CornerRadius * 2), YPosition); Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition, CornerRadius * 2, CornerRadius * 2, 270, 90); Path.AddLine(XPosition + Width, YPosition + CornerRadius, XPosition + Width, YPosition + Height - (CornerRadius * 2)); Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 0, 90); Path.AddLine(XPosition + Width - (CornerRadius * 2), YPosition + Height, XPosition + CornerRadius, YPosition + Height); Path.AddArc(XPosition, YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 90, 90); Path.AddLine(XPosition, YPosition + Height - (CornerRadius * 2), XPosition, YPosition + CornerRadius); Path.AddArc(XPosition, YPosition, CornerRadius * 2, CornerRadius * 2, 180, 90); Path.CloseFigure(); NewGraphics.DrawPath(BoxPen, Path); } } } return NewBitmap; } 

Answer 1

  public static GraphicsPath RoundedRect(Rectangle bounds, int radius) { int diameter = radius * 2; Size size = new Size(diameter, diameter); Rectangle arc = new Rectangle(bounds.Location, size); GraphicsPath path = new GraphicsPath(); if (radius == 0) { path.AddRectangle(bounds); return path; } // top left arc path.AddArc(arc, 180, 90); // top right arc arc.X = bounds.Right - diameter; path.AddArc(arc, 270, 90); // bottom right arc arc.Y = bounds.Bottom - diameter; path.AddArc(arc, 0, 90); // bottom left arc arc.X = bounds.Left; path.AddArc(arc, 90, 90); path.CloseFigure(); return path; } 

And you can create two extension methods for the Graphics type so that you can use them as ordinary Draw... and Fill... methods to draw a figure.

  public static void DrawRoundedRectangle(this Graphics graphics, Pen pen, Rectangle bounds, int cornerRadius) { if (graphics == null) throw new ArgumentNullException("graphics"); if (pen == null) throw new ArgumentNullException("pen"); using (GraphicsPath path = RoundedRect(bounds, cornerRadius)) { graphics.DrawPath(pen, path); } } public static void FillRoundedRectangle(this Graphics graphics, Brush brush, Rectangle bounds, int cornerRadius) { if (graphics == null) throw new ArgumentNullException("graphics"); if (brush == null) throw new ArgumentNullException("brush"); using (GraphicsPath path = RoundedRect(bounds, cornerRadius)) { graphics.FillPath(brush, path); } }