Winform实现透明窗体/蒙版效果

[前言]
最近客户项目部分UI要求有蒙版效果,研究多种方法还是达不到预期,某度他们的实现方法都是双窗体设计,在使用过程中特别不方便(比如要实现蒙版后切换线程后不能操作父窗体,即使使用两个ShowDialog显然还是不行).通过比较几种方法发现下面这篇博客中的实现比较有用:
https://www.cnblogs.com/dfcy/p/11586066.html

[样式展示]

[功能原理]
1.画一块透明窗体,截Form后的背景
2.添加Panel,将Panel的Dock属性设置为Fill,再将Panel的背景色使用ARGB填充,如Color.FromArgb(150, 211, 211, 211)为样式展示的效果

[代码]

    public partial class Form1 : Form{private Color tr_color = Color.Transparent;private Color maskColor = Color.FromArgb(150, 211, 211, 211);//蒙版颜色100是透明度Point ParentLocation;//蒙版位置Size ParentSize;//蒙版大小private bool b_start = false;bool[] b_visible = null;public Form1(Point parentLocation, Size parentSize){ParentLocation = parentLocation;ParentSize = parentSize;InitializeComponent();}private void Form1_Load(object sender, EventArgs e){//设置蒙版区域大小(即Form窗体大小随启动窗体大小一致)this.Location = ParentLocation;this.Size = ParentSize;maskPanel.BackColor = maskColor;//设置主Planel为蒙版颜色//设置主控件显示位置为居中parentPanel.Location = new Point((ParentSize.Width - parentPanel.Width) / 2, (ParentSize.Height - parentPanel.Height) / 2);SetBackgroundImageTransparent();BeginSet();}private void SetBackgroundImageTransparent(){Point pt = this.PointToScreen(new Point(0, 0));Bitmap b = new Bitmap(this.Width, this.Height);using (Graphics g = Graphics.FromImage(b)){g.CopyFromScreen(pt, new Point(), new Size(this.Width, this.Height));}this.BackgroundImage = b;}private void BeginSet(){tr_color = this.TransparencyKey;b_start = true;}private void Setting(){if (b_start){b_visible = new bool[Controls.Count];for (int i = 0; i < Controls.Count; i++){b_visible[i] = Controls[i].Visible;Controls[i].Visible = false;}BackgroundImage = null;BackColor = Color.White;b_start = false;this.TransparencyKey = Color.White;}}private void EndSet(){SetBackgroundImageTransparent();this.TransparencyKey = tr_color;for (int i = 0; i < Controls.Count; i++){Controls[i].Visible = b_visible[i];}b_start = false;}private void Form1_Resize(object sender, EventArgs e){Setting();}private void Form1_ResizeBegin(object sender, EventArgs e){BeginSet();}private void Form1_ResizeEnd(object sender, EventArgs e){EndSet();}private void Form1_Move(object sender, EventArgs e){Setting();}private void button1_Click(object sender, EventArgs e){this.Close();}}

[后语]
本章源码地址：https://download.csdn.net/download/qq_38469552/13087194
由于工作原因,没有过多时间来排版和优化控件,控件较为粗糙,内部bug可能存在很多,各位朋友同仁如发现异常请轻喷并与我及时联系,以免误导他人.
本章完