WinForm中按钮等控件的背景渐变色重绘
2021-07-04 19:07
标签：phi global back style form 坐标 bottom rom bitmap 注：brush通过起止坐标来控制重绘范围及方向。比如从上到下渐变时，brush第二个Point参数是左下角坐标。 WinForm中按钮等控件的背景渐变色重绘 标签：phi global back style form 坐标 bottom rom bitmap 原文地址：https://www.cnblogs.com/wyp1988/p/9844453.html 1 private void PaintGradientBackground(Button btn)
2 {
3 Bitmap newGradientBackImg = new Bitmap(btn.Width, btn.Height);
4 LinearGradientBrush brush = new LinearGradientBrush(new PointF(0, 0), new PointF(0, btn.Height), GlobalParams.UnSelected_TreeTab_Top_Color, GlobalParams.UnSelected_TreeTab_Bottom_Color);
5 Graphics gr = Graphics.FromImage(newGradientBackImg);
6 gr.FillRectangle(brush, new RectangleF(0, 0, btn.Width, btn.Height));
7 //btn.BackColor = Color.Transparent;
8 btn.BackgroundImage = newGradientBackImg;
9 }
10
11 private void ClearGradientBackground(Button btn)
12 {
13 btn.BackgroundImage = null;
14 }