异形窗体WinFrom

第一步:创建WinFrom窗体

第二部:属性:AutoScaleMode:Dpi

第三步:BackColor:White

第四步:FormBorderStyle:None

第五步:TransparencyKey:White

第六步:准备无边框的图片:BackgroundImage?

第七步:增加鼠标监听事件:MouseDown,MouseMove,MouseUp

    public partial class LoginMain : Form
    {
        public LoginMain()
        {
            InitializeComponent();
            //this.Region = BmpRgn(global::GenHeSoft.Properties.Resources.Login, Color.FromArgb(0, 0, 0));
        }
        private void LoginMain_Load(object sender, EventArgs e)
        {
            TransparencyKey = Color.White;
            Image BackgroundImage = global::GenHeSoft.Properties.Resources.Login;//本地资源文件获取
            BitmapRegion BitmapRegion = new BitmapRegion();//此为生成不规则窗体和控件的类
            BitmapRegion.CreateControlRegion(this, global::GenHeSoft.Properties.Resources.Login);
        }

        private void LoginMain_FormClosed(object sender, FormClosedEventArgs e)
        {
            //Application.Exit();//退出应用程序 
            System.Diagnostics.Process.GetCurrentProcess().Kill();//退出应用程序 
        }

        private Point mouseOffset;                 //记录鼠标指针的坐标 
        private bool isMouseDown = false;      //记录鼠标按键是否按下

        private void LoginMain_MouseDown(object sender, MouseEventArgs e)
        {
            int xOffset;
            int yOffset;

            if (e.Button == MouseButtons.Left)
            {
                xOffset = -e.X - SystemInformation.FrameBorderSize.Width;
                yOffset = -e.Y - SystemInformation.CaptionHeight -
                  SystemInformation.FrameBorderSize.Height;
                mouseOffset = new Point(xOffset, yOffset);
                isMouseDown = true;
            }
        }
        private void LoginMain_MouseMove(object sender, MouseEventArgs e)
        {
            if (isMouseDown)
            {
                Point mousePos = Control.MousePosition;
                mousePos.Offset(mouseOffset.X, mouseOffset.Y);
                Location = mousePos;
            }
        }

        private void LoginMain_MouseUp(object sender, MouseEventArgs e)
        {
            //   修改鼠标状态isMouseDown的值 
            //   确保只有鼠标左键按下并移动时,才移动窗体 
            if (e.Button == MouseButtons.Left)
            {
                isMouseDown = false;
            }
        }
}

第八步:异形窗体BitmapRegion类

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace GenHeSoft
{
    class BitmapRegion
    {
        public BitmapRegion() { }
        /// <summary>           
        /// Create and apply the region on the supplied control          
        /// 创建支持位图区域的控件(目前有button和form)          
        /// </summary>          
        /// 
        /// <param name="control">The Control object to apply the region to控件</param>           
        /// <param name="bitmap">The Bitmap object to create the region from位图</param>           
        public static void CreateControlRegion(Control control, Bitmap bitmap)
        {
            // Return if control and bitmap are null              
            //判断是否存在控件和位图              
            if (control == null || bitmap == null)
                return;
            // Set our control''s size to be the same as the bitmap              
            //设置控件大小为位图大小              
            control.Width = bitmap.Width;
            control.Height = bitmap.Height;
            // Check if we are dealing with Form here               
            //当控件是form时              
            if (control is System.Windows.Forms.Form)
            {
                // Cast to a Form object                  
                //强制转换为FORM                  
                Form form = (Form)control;
                // Set our form''s size to be a little larger that the  bitmap just                   
                // in case the form''s border style is not set to none in the first place                   
                //当FORM的边界FormBorderStyle不为NONE时,应将FORM的大小设置成比位图大小稍大一点                  
                form.Width = control.Width;
                form.Height = control.Height;
                // No border                   
                //没有边界                  
                form.FormBorderStyle = FormBorderStyle.None;
                // Set bitmap as the background image                   
                //将位图设置成窗体背景图片                  
                form.BackgroundImage = bitmap;
                // Calculate the graphics path based on the bitmap supplied                   
                //计算位图中不透明部分的边界                  
                GraphicsPath graphicsPath = CalculateControlGraphicsPath(bitmap);
                // Apply new region                   
                //应用新的区域                  
                form.Region = new Region(graphicsPath);
            }
            // Check if we are dealing with Button here               
            //当控件是button时              
            else if (control is System.Windows.Forms.Button)
            {
                // Cast to a button object                   
                //强制转换为 button                  
                Button button = (Button)control;
                // Do not show button text                   
                //不显示button text                  
                button.Text = "";
                // Change cursor to hand when over button                   
                //改变 cursor的style                  
                button.Cursor = Cursors.Hand;
                // Set background image of button                   
                //设置button的背景图片                  
                button.BackgroundImage = bitmap;
                // Calculate the graphics path based on the bitmap supplied                   
                //计算位图中不透明部分的边界                  
                GraphicsPath graphicsPath = CalculateControlGraphicsPath(bitmap);
                // Apply new region                   
                //应用新的区域                  
                button.Region = new Region(graphicsPath);
            }
        }

        /// <summary>           
        /// Calculate the graphics path that representing the figure in the bitmap           
        /// excluding the transparent color which is the top left pixel.           
        /// //计算位图中不透明部分的边界          
        /// </summary>           
        /// <param name="bitmap">The Bitmap object to calculate our graphics path from</param>           
        /// <returns>Calculated graphics path</returns>           
        private static GraphicsPath CalculateControlGraphicsPath(Bitmap bitmap)
        {
            // Create GraphicsPath for our bitmap calculation               
            //创建 GraphicsPath              
            GraphicsPath graphicsPath = new GraphicsPath();
            // Use the top left pixel as our transparent color               
            //使用左上角的一点的颜色作为我们透明色              
            Color colorTransparent = bitmap.GetPixel(0, 0);
            // This is to store the column value where an opaque pixel is first found.               
            // This value will determine where we start scanning for trailing opaque pixels.              
            //第一个找到点的X              
            int colOpaquePixel = 0;
            // Go through all rows (Y axis)               
            // 偏历所有行(Y方向)              
            for (int row = 0; row < bitmap.Height; row++)
            {
                // Reset value                   
                //重设                  
                colOpaquePixel = 0;
                // Go through all columns (X axis)                   
                //偏历所有列(X方向)                  
                for (int col = 0; col < bitmap.Width; col++)
                {
                    // If this is an opaque pixel, mark it and search for anymore trailing behind                       
                    //如果是不需要透明处理的点则标记,然后继续偏历                      
                    if (bitmap.GetPixel(col, row) != colorTransparent)
                    {
                        // Opaque pixel found, mark current position                         
                        //记录当前                          
                        colOpaquePixel = col;
                        // Create another variable to set the current pixel position                          
                        //建立新变量来记录当前点                         
                        int colNext = col;
                        // Starting from current found opaque pixel, search for anymore opaque pixels                 
                        // trailing behind, until a transparent   pixel is found or minimum width is reached               
                        //从找到的不透明点开始,继续寻找不透明点,一直到找到或则达到图片宽度                        
                        for (colNext = colOpaquePixel; colNext < bitmap.Width; colNext++)
                            if (bitmap.GetPixel(colNext, row) == colorTransparent)
                                break;
                        // Form a rectangle for line of opaque   pixels found and add it to our graphics path           
                        //将不透明点加到graphics path                       
                        graphicsPath.AddRectangle(new Rectangle(colOpaquePixel, row, colNext - colOpaquePixel, 1));
                        // No need to scan the line of opaque pixels just found                   
                        col = colNext;
                    }
                }
            }
            // Return calculated graphics path        
            return graphicsPath;
        }
    }
}

 

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