圆形图片框 [英] circle shaped picture box

问题描述

亲爱的先生，

我想在c＃中创建圆形图片框。可以画出图片框。

我该怎么办。

Dear sir,
I want to create circular picture box in c#.Can it be possible to draw picture box.
how can i do.

推荐答案

最简单的方法是设置区域：

The easiest way is to set the Region:

myPictureBox.Image = Image.FromFile(@"D:\Temp\MyPic.jpg");
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse(myPictureBox.DisplayRectangle);
myPictureBox.Region = new Region(gp);

我做了这个控制来移除边缘上的像素

I did this control to remove the pixels on the edges

public class CirclePictureBox : PictureBox
        {
            public CirclePictureBox ()
            {
            }

            protected override void OnPaint(PaintEventArgs e)
            {
                System.Drawing.Brush brushImege;
                try
                {
                    Bitmap Imagem = new Bitmap(this.Image);
                    //get images of the same size as control
                    Imagem = new Bitmap(Imagem, new Size(this.Width - 1, this.Height - 1));
                    brushImege = new TextureBrush(Imagem);
                }
                catch
                {
                    Bitmap Imagem = new Bitmap(this.Width - 1, this.Height - 1, PixelFormat.Format24bppRgb);
                    using (Graphics grp = Graphics.FromImage(Imagem))
                    {
                        grp.FillRectangle(
                            Brushes.White, 0, 0, this.Width - 1, this.Height - 1);
                        Imagem = new Bitmap(this.Width - 1, this.Height - 1, grp);
                    }
                    brushImege = new TextureBrush(Imagem);
                }
                e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
                GraphicsPath path = new GraphicsPath();
                path.AddEllipse(0, 0, this.Width - 1, this.Height - 1);
                e.Graphics.FillPath(brushImege, path);
                e.Graphics.DrawPath(Pens.Black, path);
            }
        }

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