WInForm修改button形状为带圆角时，只有左上角是圆角

[LUCKTT2322]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing.Drawing2D ;

namespace WindowsFormsApplication6.button._03
{

public partial class Form1 : Form
{

public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
}
protected override void OnPaint(PaintEventArgs pe)
{
GraphicsPath path = new GraphicsPath();
Rectangle rect = new Rectangle(0, 22, this.Width, this.Height-22);
path = GetRoundedRectPath(rect, 20);
Region reg = new Region(path);
this.button1.Region = reg;
base.OnPaint(pe);
}
private GraphicsPath GetRoundedRectPath(Rectangle rect, int radius)
{
int diameter = radius;
Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));
GraphicsPath path = new GraphicsPath();
// 左上角
path.AddArc(arcRect, 180, 90);
// 右上角
arcRect.X = rect.Right - diameter;
path.AddArc(arcRect, 270, 90);
// 右下角
arcRect.Y = rect.Bottom - 0;
path.AddArc(arcRect, 0, 90);
// 左下角
arcRect.X = rect.Left;
path.AddArc(arcRect, 90, 90);
path.CloseFigure();
return path;
}
private void SetWindowRegion(object sender, EventArgs e)
{
}
private void OnPaint(object sender, EventArgs e)
{
}
}

}

[MichaelGLX]

很明显设置 this.button1.Region 这个不对。

[MichaelGLX]

每次画圆角的时候都用Rectangle arcRect么？ 位置不改变么？

[MichaelGLX]

引用 2 楼 MichaelGLX 的回复:

每次画圆角的时候都用Rectangle arcRect么？ 位置不改变么？

看错了。这个怎么删除呀！！

是工作区域设置不对，你画的时候 rect长宽-1试试？还有 设置工作区域为线条 这样怎么点击呀。你可以填充起来！

[上帝的亲哥哥]

引用 8 楼 Bridge_go 的回复:

搞个图片完事，自己绘多麻烦

确实，这样一堆代码，还容易出错，要么你直接用WPF写一个ControlTemplate，直接搞定，做WinForm的，GDI+需要掌握其中的技巧，这项目需要改变外观的，太适合用WPF去做了WinForm毕竟，不适合做过多的外观修改！！！WPF是做C/S的WinForm下的一个完整补充

[desperaso]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Gid_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Draw(Rectangle rectangle, Graphics g, int _radius, bool cusp, Color begin_color, Color end_color)
        {
            int span = 2;
            //抗锯齿
            g.SmoothingMode = SmoothingMode.AntiAlias;
            //渐变填充
            LinearGradientBrush myLinearGradientBrush = new LinearGradientBrush(rectangle, begin_color, end_color, LinearGradientMode.Vertical);
            //画尖角
            if (cusp)
            {
                span = 10;
                PointF p1 = new PointF(rectangle.Width - 12, rectangle.Y + 10);
                PointF p2 = new PointF(rectangle.Width - 12, rectangle.Y + 30);
                PointF p3 = new PointF(rectangle.Width, rectangle.Y + 20);
                PointF[] ptsArray = { p1, p2, p3 };
                g.FillPolygon(myLinearGradientBrush, ptsArray);
            }
            //填充
            g.FillPath(myLinearGradientBrush, DrawRoundRect(rectangle.X, rectangle.Y, rectangle.Width - span, rectangle.Height-1, _radius));
        }
        public static GraphicsPath DrawRoundRect(int x, int y, int width, int height, int radius)
        {
            //四边圆角
            GraphicsPath gp = new GraphicsPath();
            gp.AddArc(x, y, radius, radius, 180, 90);
            gp.AddArc(width - radius, y, radius, radius, 270, 90);
            gp.AddArc(width - radius, height - radius, radius, radius, 0, 90);
            gp.AddArc(x, height - radius, radius, radius, 90, 90);
            gp.CloseAllFigures();
            return gp;
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            Draw(e.ClipRectangle, e.Graphics, 18,true, Color.FromArgb(90, 143, 0), Color.FromArgb(41, 67, 0));
            base.OnPaint(e);
            Graphics g = e.Graphics;
            g.DrawString("其实我是个Panel", new Font("微软雅黑", 9, FontStyle.Regular), new SolidBrush(Color.White), new PointF(10, 10));
        }

        private void panel2_Paint(object sender, PaintEventArgs e)
        {
            Draw(e.ClipRectangle, e.Graphics, 18, false, Color.FromArgb(113, 113, 113), Color.FromArgb(0, 0, 0));
            base.OnPaint(e);
            Graphics g = e.Graphics;
            g.DrawString("其实我是个Panel", new Font("微软雅黑", 9, FontStyle.Regular), new SolidBrush(Color.White), new PointF(10, 10));
        }

        private void button1_Paint(object sender, PaintEventArgs e)
        {
            Draw(e.ClipRectangle, e.Graphics, 18, false, Color.FromArgb(0, 122, 204), Color.FromArgb(8, 39, 57));
            base.OnPaint(e);
            Graphics g = e.Graphics;
            g.DrawString("其实我是个按钮", new Font("微软雅黑", 9, FontStyle.Regular), new SolidBrush(Color.White), new PointF(10, 10));
        }

        private void label1_Paint(object sender, PaintEventArgs e)
        {
            Draw(e.ClipRectangle, e.Graphics, 18, false, Color.FromArgb(210, 210, 210), Color.FromArgb(242, 242, 242));
            base.OnPaint(e);

            Graphics g = e.Graphics;
            g.DrawString("其实我是Label", new Font("微软雅黑", 9, FontStyle.Regular), new SolidBrush(Color.Black), new PointF(10, 10));
        }
    }
}

圆角按钮要设置

否则4个角还有颜色。

[LUCKTT2322]

这样的button怎么设置点击后背景颜色

[LUCKTT2322]

改变时 四个角又有颜色了呀

[assky124]

自绘一个Button不是省事很多

[Bridge_go]

搞个图片完事，自己绘多麻烦