C#圆角矩形窗体的绘制.doc

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Drawing2D;namespace TestFrm public partial class TestFrm : Form /定义鼠标消息常量 private const int WM_NCHITTEST = 0X0084; private const int HT_LEFT = 10; private const int HT_RIGHT = 11; private const int HT_TOP = 12; private const int HT_TOPLEFT = 13; private const int HT_TOPRIGHT = 14; private const int HT_BOTTOM = 15; private const int HT_BOTTOMLEFT = 16; private const int HT_BOTTOMRIGHT = 17; private const int HT_CAPTION = 2; /处理Windows消息 protected override void WndProc(ref Message Msg) if (Msg.Msg = WM_NCHITTEST) /获取鼠标位置 int nPosX = (Msg.LParam.ToInt32() & 65535); int nPosY = (Msg.LParam.ToInt32() 16); /右下角 if (nPosX = this.Right - 6 & nPosY = this.Bottom - 6) Msg.Result = new IntPtr(HT_BOTTOMRIGHT); return; /左上角 else if (nPosX = this.Left + 6 & nPosY = this.Top + 6) Msg.Result = new IntPtr(HT_TOPLEFT); return; /左下角 else if (nPosX = this.Bottom - 6) Msg.Result = new IntPtr(HT_BOTTOMLEFT); return; /右上角 else if (nPosX = this.Right - 6 & nPosY = this.Right - 2) Msg.Result = new IntPtr(HT_RIGHT); return; else if (nPosY = this.Bottom - 2) Msg.Result = new IntPtr(HT_BOTTOM); return; else if (nPosX = this.Left + 2) Msg.Result = new IntPtr(HT_LEFT); return; else if (nPosY = this.Top + 2) Msg.Result = new IntPtr(HT_TOP); return; else Msg.Result = new IntPtr(HT_CAPTION); return; base.WndProc(ref Msg); public TestFrm() InitializeComponent(); public void SetWindowRegion() System.Drawing.Drawing2D.GraphicsPath FormPath; FormPath = new System.Drawing.Drawing2D.GraphicsPath(); Rectangle rect = new Rectangle(0, 0, this.Width, this.Height); FormPath = GetRoundedRectPath(rect, 10); 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 - diameter; path.AddArc(arcRect, 0, 90); / 左下角 arcRect.X = rect.Left; path.AddArc(arcRect, 90, 90); path.CloseFigure();/闭合曲线 return path; private void Form1_Resize(object sender, EventArgs e) /采用界面二重缓冲 SetStyle(ControlStyles.SupportsTransparentBackColor, true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.DoubleBuffer, true); this.Refresh(); SetWindowRegion(); string curFileName=; Bitmap curBitmap; private void btnOpen_Click(object sender, EventArgs e) private void labOpfile_Click(object sender, EventArgs e) OpenFileDialog opfile = new OpenFileDialog(); opfile.Title = 请选择一个图像; opfile.Multiselect = true; opfile.Filter = 所有图像文件|*.jpg;*.png;*.bmp;*.gif; if (opfile.ShowDialog() = DialogResult.OK) try curFileName = op