C#实现Led指示灯(自定义用户控件)

【实例简介】

使用GDI 实现Led指示灯，可配置开关状态的颜色，圆形和方形

【实例截图】

【核心代码】

int diameter = Math.Min(this.Width, this.Height);
            PointF startPoint;
            RectangleF rec;
            Color color = ledStatus ? ledTrueColor : ledFalseColor;
            if (isFlash)
            {
                lampColor = new Color[] { color, Color.Yellow };
                color = lampColor[intColorIndex];
            }
            sb = new SolidBrush(color);
            switch (ledStyle)
            {
                case LedStyle.圆形:
                    startPoint = new PointF((this.Width - diameter) / 2, (this.Height - diameter) / 2);
                    rec = new RectangleF(startPoint, new SizeF(diameter - 2, diameter - 2));//创建矩形
                    g.FillEllipse(sb, rec);//画圆
                    break;
                case LedStyle.方形:
                    startPoint = new PointF(1, 1);
                    rec = new RectangleF(startPoint, new SizeF(Width - 2, Height - 2));//创建矩形
                    g.FillRectangle(sb, rec);//画矩形
                    break;
                default:
                    startPoint = new PointF((this.Width - diameter) / 2, (this.Height - diameter) / 2);
                    rec = new RectangleF(startPoint, new SizeF(diameter - 2, diameter - 2));//创建矩形
                    g.FillEllipse(sb, rec);//画圆
                    break;
            }