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首先在Form中添加一个控件,然后将控件的背景BackColor设置成透明 、
然后分别设置控件的Image: Image image = Image.FromFile(UserLoginInfor.LoginInfor.userIco); 获取image的width、height:width= image.width、height=image.height 然后实现该功能,具体代码如下:(pictureBox1:控件的名称) Image image = Image.FromFile(UserLoginInfor.LoginInfor.userIco); this.pictureBox1.Image = CutEllipse(Image.FromFile(UserLoginInfor.LoginInfor.userIco), new Rectangle(0, 0,image .Width, image .Height), new Size(image .Width, image .Height)); 最后创建一个自定义方法CutEllipse: private Image CutEllipse(Image img, Rectangle rec, Size size) { Bitmap bitmap = new Bitmap(size.Width, size.Height); using (Graphics g = Graphics.FromImage(bitmap)) { using (TextureBrush br = new TextureBrush(img, System.Drawing.Drawing2D.WrapMode.Clamp, rec)) { br.ScaleTransform(bitmap.Width / (float)rec.Width, bitmap.Height / (float)rec.Height); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.FillEllipse(br, new Rectangle(Point.Empty, size)); } } return bitmap; } 参考网址:https://q.cnblogs.com/q/11565/
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