C# 自制水晶按钮（很漂亮）
网上找的，直接上代码，供初学者学习借鉴：
using System;using System.Drawing;using System.Windows.Forms;using System.Drawing.Drawing2D;using System.Drawing.Imaging;namespace GButton{ public partial class GZXButton : Button { private enum MouseActionType { None, Hover, Click } private MouseActionType mouseActionType; private ImageAttributes imgattr = new ImageAttributes();//实例化一个图像属性类 private Bitmap btnbmp;//定义一个位图 private Rectangle btnrc;//定义一个矩形 public GZXButton() { InitializeComponent(); mouseActionType = MouseActionType.None; this.SetStyle(ControlStyles.AllPaintingInWmPaint|//禁止擦除背景 ControlStyles.DoubleBuffer|//双缓冲 ControlStyles.UserPaint,true); //下面这些可以不设置,也可以自己定义 this.Font = new Font("Aial Black", 12, FontStyle.Bold); this.BackColor = Color.DarkTurquoise; this.Size = new Size(112, 48); } /// <summary> /// 按钮形状 /// </summary> /// <param name="rc">按钮的坐标和大小</param> /// <param name="r">按钮圆弧的半径</param> /// <returns>返回按钮形状</returns> private GraphicsPath GetGraphicsPath(Rectangle rc, int r) { int x = rc.X, y = rc.Y, w = rc.Width, h = rc.Height; GraphicsPath gpath = new GraphicsPath(); gpath.AddArc(x, y, r, r, 180, 90);//左上角圆弧 gpath.AddArc(x + w - r, y, r, r, 270, 90);//右上角圆弧 gpath.AddArc(x + w - r, y + h - r,r, r, 0, 90);//右下角圆弧 gpath.AddArc(x, y + h - r, r, r, 90, 90);//左下角圆弧 gpath.CloseFigure();//闭合 return gpath; } protected override void OnPaint(PaintEventArgs pe) { // base.OnPaint(pe); Graphics g = pe.Graphics;//创建画布 g.Clear(SystemColors.ButtonFace);//重置背景颜色,可以自定义 Color clr = this.BackColor; int btnOff = 0;//按钮边距 int shadowOff = 0;//阴影边距 switch (mouseActionType) { case MouseActionType.None: break; case MouseActionType.Hover: clr = Color.LightGray; break; case MouseActionType.Click: shadowOff = 4; clr = Color.LightGray; btnOff = 2; break; default: break; } g.SmoothingMode = SmoothingMode.AntiAlias;//消除锯齿 //创建按钮本身的图形 Rectangle rc1 = new Rectangle(btnOff, btnOff, this.ClientSize.Width - 8 - btnOff, this.ClientSize.Height - 8 - btnOff); GraphicsPath gpath1 = this.GetGraphicsPath(rc1, 20); LinearGradientBrush br1 = new LinearGradientBrush(new Point(0, 0), new Point(0, rc1.Height + 6), clr, Color.White); //创建按钮阴影 Rectangle rc2 = rc1; rc2.Offset(shadowOff, shadowOff); GraphicsPath gpath2 = this.GetGraphicsPath(rc2, 20); PathGradientBrush br2 = new PathGradientBrush(gpath2); br2.CenterColor = Color.Black; br2.SurroundColors = new Color[] { SystemColors.ButtonFace }; //为了更逼真，我们将渐变结束颜色设定为窗体前景色，可以根据窗口的前景颜色适当调整 //创建按钮顶部白色渐变 Rectangle rc3 = rc1; rc3.Inflate(-5, -5); rc3.Height = 15; GraphicsPath gpath3 = GetGraphicsPath(rc3, 20); LinearGradientBrush br3 = new LinearGradientBrush(rc3, Color.FromArgb(255, Color.White), Color.FromArgb(0, Color.White), LinearGradientMode.Vertical); //绘制图形 g.FillPath(br2, gpath2);//绘制阴影 g.FillPath(br1, gpath1);//绘制按钮 g.FillPath(br3, gpath3);//绘制顶部白色泡泡 //设定内存位图对象，进行二级缓存绘图操作 btnrc = new Rectangle(rc1.Location, rc1.Size); btnbmp = new Bitmap(btnrc.Width, btnrc.Height); Graphics g_bmp = Graphics.FromImage(btnbmp); g_bmp.SmoothingMode = SmoothingMode.AntiAlias; g_bmp.FillPath(br1, gpath1); g_bmp.FillPath(br3, gpath3); //将region赋值给button Region rgn = new Region(gpath1); rgn.Union(gpath2); this.Region = rgn; //绘制按钮的文本 GraphicsPath gpath4 = new GraphicsPath(); RectangleF gpath1bounds = gpath1.GetBounds(); Rectangle rcText = new Rectangle((int)gpath1bounds.X + btnOff, (int)gpath1bounds.Y + btnOff, (int)gpath1bounds.Width, (int)gpath1bounds.Height); StringFormat strFormat = new StringFormat(); strFormat.Alignment = StringAlignment.Center; strFormat.LineAlignment = StringAlignment.Center;//横竖都居中 gpath4.AddString(this.Text, this.Font.FontFamily, (int)this.Font.Style, this.Font.Size, rcText, strFormat); Pen txtPen = new Pen(this.ForeColor, 1); g.DrawPath(txtPen, gpath4); g_bmp.DrawPath(txtPen, gpath4); } protected override void OnMouseDown(MouseEventArgs mevent) { if (mevent.Button == MouseButtons.Left) { this.mouseActionType = MouseActionType.Click; this.Invalidate(); } base.OnMouseDown(mevent); } protected override void OnMouseUp(MouseEventArgs mevent) { this.mouseActionType = MouseActionType.Hover; this.Invalidate(); base.OnMouseUp(mevent); } protected override void OnMouseHover(EventArgs e) { this.mouseActionType = MouseActionType.Hover; this.Invalidate(); base.OnMouseHover(e); } protected override void OnMouseEnter(EventArgs e) { this.mouseActionType = MouseActionType.Hover; this.Invalidate(); base.OnMouseEnter(e); } protected override void OnMouseLeave(EventArgs e)//鼠标离开事件 { this.mouseActionType = MouseActionType.None; this.Invalidate(); base.OnMouseLeave(e); } }}