本文实例讲述了WinForm绘制圆角的方法。分享给大家供大家参考。具体实现方法如下：
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Drawing.Drawing2D;
namespace AppStartSample
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
}
public void SetWindowRegion()
{
System.Drawing.Drawing2D.GraphicsPath FormPath;
FormPath = new System.Drawing.Drawing2D.GraphicsPath();
Rectangle rect = new Rectangle(0, 22, this.Width, this.Height - 22);//
FormPath = GetRoundedRectPath(rect, 30);
this.Region = new Region(FormPath);
}
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;
}
protected override void OnResize(System.EventArgs e)
{
this.Region = null;
SetWindowRegion();
}
}
}
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