本文实例讲述了C#实现主窗体最小化后出现悬浮框及双击悬浮框恢复原窗体的方法。分享给大家供大家参考。具体如下：

这里演示C#实现主窗体最小化后出现悬浮框，双击悬浮框恢复原窗体的效果。类似于360桌面。

主窗体：frmMain

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.Threading; namespace AppDemo { public partial class frmMain : Form { public frmMain() { InitializeComponent(); } /// <summary> /// 窗体初始状态 /// </summary> private FormWindowState fwsPrevious; /// <summary> /// 悬浮窗体 /// </summary> private frmTopMost myTopMost; /// <summary> /// 主窗体的Load事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void frmMain_Load(object sender, EventArgs e) { fwsPrevious = this.WindowState; myTopMost = new frmTopMost(this); } /// <summary> /// 主窗体的SizeChanged事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void frmMain_SizeChanged(object sender, EventArgs e) { if (this.WindowState == FormWindowState.Minimized) { myTopMost.Show(); this.ShowInTaskbar = false; } else if (this.WindowState != fwsPrevious) { fwsPrevious = this.WindowState; } } /// <summary> /// 还原窗口方法，即供悬浮窗口进行调用的。 /// </summary> public void RestoreWindow() { this.WindowState = fwsPrevious; this.ShowInTaskbar = true; } } }

悬浮子窗体：frmTopMost

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; namespace AppDemo { /// <summary> /// 首先要设置其窗体的FormBorderStyle为None，然后设置其的TopMost为true，接下来，就是主要是三个鼠标事件的处理 /// </summary> public partial class frmTopMost : Form { public frmTopMost() { InitializeComponent(); } /// <summary> /// 悬浮窗口的构造函数 /// </summary> /// <param name="main"></param> public frmTopMost(frmMain main) { InitializeComponent(); pParent = main; } private Point ptMouseCurrrnetPos, ptMouseNewPos, ptFormPos, ptFormNewPos; private bool blnMouseDown = false; private frmMain pParent; /// <summary> /// 悬浮窗口的Load事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void frmTopMost_Load(object sender, EventArgs e) { this.Show(); this.Top = 100; this.Left = Screen.PrimaryScreen.Bounds.Width - 100; this.Width = 80; this.Height = 80; } private void frmTopMost_MouseMove(object sender, MouseEventArgs e) { if (blnMouseDown) { ptMouseNewPos = Control.MousePosition; ptFormNewPos.X = ptMouseNewPos.X - ptMouseCurrrnetPos.X + ptFormPos.X; ptFormNewPos.Y = ptMouseNewPos.Y - ptMouseCurrrnetPos.Y + ptFormPos.Y; Location = ptFormNewPos; ptFormPos = ptFormNewPos; ptMouseCurrrnetPos = ptMouseNewPos; } } private void frmTopMost_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { blnMouseDown = true; ptMouseCurrrnetPos = Control.MousePosition; ptFormPos = Location; } } private void frmTopMost_MouseUp(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) blnMouseDown = false; } /// <summary> /// 双击悬浮窗体，进行恢复主窗体。 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void frmTopMost_MouseDoubleClick(object sender, MouseEventArgs e) { SwitchToMain(); } private void SwitchToMain() { pParent.RestoreWindow(); this.Hide(); } } }

希望本文所述对大家的C#程序设计有所帮助。