Winform窗体半透明，控件不透明，及皮肤美化效果

来源：互联网发布：ubuntu 16 开机自启动编辑：程序博客网时间：2024/04/29 11:37

先看效果图：

其实网上实现窗体半透明，控件不透明的方法很多，能用微软的API做出效果固然很好，然而其实现方法上有点点复杂，我个人没怎么去深究这个问题，因为我只想实现这个效果而已，选择一个简单的方法是最好的，这样学友们也能够容易理解，那就我简单的介绍下我个人的一个窗体透明实现流程。

1：新建一个窗体，我命名为Form2

上面有几个窗体缩小，最大化，及关闭的按钮，自己随便定义下。

这个窗体是主窗体，接下来在主窗体写相关的代码：

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;namespace WindowsFormsApplication1{    public partial class Form2 : Form    {

        //窗体移动API函数        //public const int WM_NCLBUTTONDOWN = 0xA1;        //public const int HT_CAPTION = 0x2;        //[DllImportAttribute("user32.dll")]        //public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);        //[DllImportAttribute("user32.dll")]        //public static extern bool ReleaseCapture();        private HalfTransparentChildForm childForm;//此为副窗体        public Form2()        {            InitializeComponent();            this.BackgroundImage = new Bitmap(AppDomain.CurrentDomain.BaseDirectory + "backgroundPic\\25.jpg");            this.Opacity = 0.3; // 窗体透明度                            this.childForm =new HalfTransparentChildForm(this);                         this.childForm.Owner = this;    // 这支所属窗体                            this.childForm.Dock = DockStyle.Fill;                          this.childForm.Show();                        this.childForm.BringToFront();            childForm.Location = new Point(this.Location.X+8,this.Location.Y+29);            this.childForm.Size = new Size(this.Size.Width - 17, this.Height - 39);            //mouseControl();            SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);            UpdateStyles();        }

        //此代码也是能实现窗体移动效果的，调用微软API函数        //void mouseControl()        //{        //   this.MouseDown += (sender, e) => {        //        //if (e.Button == MouseButtons.Left)                //{                //    ReleaseCapture();                //    SendMessage(this.Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);                //}                        //    };        //} 
        // <summary>        // 窗体四个角圆角化        // </summary>        // <param name="e"></param>        protected override void OnResize(EventArgs e)        {
            base.OnResize(e);            int Rgn = Win32.CreateRoundRectRgn(3, 3, this.Width - 1, this.Height - 1, 5, 5);            Win32.SetWindowRgn(this.Handle, Rgn, true);
            if (this.childForm != null)                this.childForm.Size = new Size(this.Size.Width - 17, this.Height - 39);        }
 
 
       //也可以实现圆角化效果，任选一种
        //private void Form2_Paint(object sender, PaintEventArgs e)        //{            //List<Point> list = new List<Point>();            //int width = this.Width;            //int height = this.Height;
            ////左上            //list.Add(new Point(0, 5));            //list.Add(new Point(1, 5));            //list.Add(new Point(1, 3));            //list.Add(new Point(2, 3));            //list.Add(new Point(2, 2));            //list.Add(new Point(3, 2));            //list.Add(new Point(3, 1));            //list.Add(new Point(5, 1));            //list.Add(new Point(5, 0));            ////右上            //list.Add(new Point(width - 5, 0));            //list.Add(new Point(width - 5, 1));            //list.Add(new Point(width - 3, 1));            //list.Add(new Point(width - 3, 2));            //list.Add(new Point(width - 2, 2));            //list.Add(new Point(width - 2, 3));            //list.Add(new Point(width - 1, 3));            //list.Add(new Point(width - 1, 5));            //list.Add(new Point(width - 0, 5));            ////右下            //list.Add(new Point(width - 0, height - 5));            //list.Add(new Point(width - 1, height - 5));            //list.Add(new Point(width - 1, height - 3));            //list.Add(new Point(width - 2, height - 3));            //list.Add(new Point(width - 2, height - 2));            //list.Add(new Point(width - 3, height - 2));            //list.Add(new Point(width - 3, height - 1));            //list.Add(new Point(width - 5, height - 1));            //list.Add(new Point(width - 5, height - 0));            ////左下            //list.Add(new Point(5, height - 0));            //list.Add(new Point(5, height - 1));            //list.Add(new Point(3, height - 1));            //list.Add(new Point(3, height - 2));            //list.Add(new Point(2, height - 2));            //list.Add(new Point(2, height - 3));            //list.Add(new Point(1, height - 3));            //list.Add(new Point(1, height - 5));            //list.Add(new Point(0, height - 5));
            //Point[] points = list.ToArray();
            //GraphicsPath shape = new GraphicsPath();            //shape.AddPolygon(points);
            ////将窗体的显示区域设为GraphicsPath的实例             //this.Region = new System.Drawing.Region(shape);
        //}
         
 
        private const int WM_NCHITTEST = 0x84;        private const int HTCLIENT = 0x1;        private const int HTCAPTION = 0x2;        //实现移动主窗体，并可放大，缩小        protected override void WndProc(ref Message message)        {            base.WndProc(ref message);            if (message.Msg == WM_NCHITTEST && (int)message.Result == HTCLIENT)            {                message.Result = (IntPtr)HTCAPTION;            }            if (this.WindowState == FormWindowState.Maximized)            {                button2.Text = "▣";            }            if (this.WindowState == FormWindowState.Normal)            {                button2.Text = "□";            }        }        //窗体边框阴影化        protected override CreateParams CreateParams        {            get            {                CreateParams createParams = base.CreateParams;                createParams.ClassStyle |= 0x20000;                return createParams;            }        }

        //副窗体随主窗体变化        private void Form2_Resize(object sender, EventArgs e)        {            if (this.childForm != null)                this.childForm.Size = new Size(this.Size.Width-17,this.Height-39);        }        //副窗体随主窗体位置移动        private void Form2_LocationChanged(object sender, EventArgs e)        {             if (this.childForm != null)             childForm.Location = new Point(this.Location.X+8, this.Location.Y+29);        }        //窗体关闭，及相关线程也关闭        private void button1_Click(object sender, EventArgs e)        {            Application.Exit();            System.Diagnostics.Process pro = System.Diagnostics.Process.GetCurrentProcess();            pro.Kill();        }

        //最大化及一般化        private void button2_Click(object sender, EventArgs e)        {            if (button2.Text == "□")            {                this.WindowState = FormWindowState.Maximized;                button2.Text="▣";            }            else            {                this.WindowState = FormWindowState.Normal;                button2.Text = "□";            }        }        //最小化        private void button3_Click(object sender, EventArgs e)        {            this.WindowState = FormWindowState.Minimized;        }    }}

2.新建副窗体命名为：HalfTransparentChildForm

我加了2个控件，方便你们调节的时候，能够更清晰的看出半透明效果

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;namespace WindowsFormsApplication1{    public partial class HalfTransparentChildForm : Form    {        Form2 f2;        public HalfTransparentChildForm(Form2 f)        {            InitializeComponent();            f2 = f;            string skin1 = AppDomain.CurrentDomain.BaseDirectory + "backgroundPic\\25.jpg";            string skin2 = AppDomain.CurrentDomain.BaseDirectory + "backgroundPic\\Garden.jpg";            string skin3 = AppDomain.CurrentDomain.BaseDirectory + "backgroundPic\\back.jpg";            string skin4 = AppDomain.CurrentDomain.BaseDirectory + "backgroundPic\\Autumn.jpg";            comboBox1.Items.AddRange(new string[] { skin1, skin2,skin3,skin4});            comboBox1.SelectedItem=skin1;            this.trackBar1.Scroll += new EventHandler(trackBar1_Scroll);            SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);            UpdateStyles();        }        void trackBar1_Scroll(object sender, EventArgs e)        {            f2.Opacity = (double)trackBar1.Value / 100.0;        }        /// <summary>        /// 边框阴影        /// </summary>        protected override CreateParams CreateParams        {            get            {                CreateParams createParams = base.CreateParams;                createParams.ClassStyle |= 0x20000;                return createParams;            }        }        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)        {            f2.BackgroundImage = new Bitmap(comboBox1.SelectedItem.ToString());        }      }}

3.Win32 API函数类

新建一个类名为Win32的类：

using System;using System.Runtime.InteropServices;using System.ComponentModel;using System.Text;using System.Drawing;using System.Drawing.Drawing2D;using System.Drawing.Imaging;using System.Windows.Forms;using System.Collections;/// <summary>/// Wind32API声明/// </summary>internal class Win32{    [StructLayout(LayoutKind.Sequential)]    public struct Size    {        public Int32 cx;        public Int32 cy;        public Size(Int32 x, Int32 y)        {            cx = x;            cy = y;        }    }    [StructLayout(LayoutKind.Sequential, Pack = 1)]    public struct BLENDFUNCTION    {        public byte BlendOp;        public byte BlendFlags;        public byte SourceConstantAlpha;        public byte AlphaFormat;    }    [StructLayout(LayoutKind.Sequential)]    public struct Point    {        public Int32 x;        public Int32 y;        public Point(Int32 x, Int32 y)        {            this.x = x;            this.y = y;        }    }    public const byte AC_SRC_OVER = 0;    public const Int32 ULW_ALPHA = 2;    public const byte AC_SRC_ALPHA = 1;    [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]    public static extern IntPtr CreateCompatibleDC(IntPtr hDC);    [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]    public static extern IntPtr GetDC(IntPtr hWnd);    [DllImport("gdi32.dll", ExactSpelling = true)]    public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObj);    [DllImport("user32.dll", ExactSpelling = true)]    public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);    [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]    public static extern int DeleteDC(IntPtr hDC);    [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]    public static extern int DeleteObject(IntPtr hObj);    [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]    public static extern int UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pptSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);    [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]    public static extern IntPtr ExtCreateRegion(IntPtr lpXform, uint nCount, IntPtr rgnData);    /// <summary>    /// 设置边窗圆角    /// </summary>    /// <param name="x">左</param>    /// <param name="y">上</param>    /// <param name="z">右</param>    /// <param name="a">下</param>    /// <param name="b">宽</param>    /// <param name="c">高</param>    /// <returns></returns>    [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]    public static extern int CreateRoundRectRgn(int Left,int Top,int Right,int Bottom,int Width,int Height);    [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]    public static extern int SetWindowRgn(IntPtr hWnd,int handle,bool b);}

好了，效果已完成，大致上就是这么实现的，主要原理还是采用了最普通的，也是最简单的方法：2个窗体相叠加的原理，相信大家也能够理解的。还有边框的四个角实现圆角效果我调用了的微软的API函数来实现的。当然还可以用GDI+画出来，比较繁琐而已，方法也已经在上面给大家写出来了，你们哪种方便就用哪种吧。

窗体半透明，控件不透明