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前言
消息通知在应用程序中，是一种非常有用的功能，实现对一些重要信息、提醒或警告及时向用户展示。我们在使用软件时，通常会收到一种从桌面右下角弹出的（提示信息或广告）信息框。本文将介绍使用 C# 实现此种方式的信息通知窗口。
实现
1、使用 API 的 AnimateWindow 函数
定义 AnimateWindows
using System;using System.Runtime.InteropServices;namespace Fountain.WinForm.MessageBoxDemo{public class Win32{/// <summary>/// 自左向右显示窗口,该标记可以在迁移转变动画和滑动动画中应用。应用AW_CENTER标记时忽视该标记/// </summary>public const int AW_HOR_POSITIVE = 0x0001;/// <summary>/// 自右向左显示窗口,该标记可以在迁移转变动画和滑动动画中应用。应用AW_CENTER标记时忽视该标记/// </summary>public const int AW_HOR_NEGATIVE = 0x0002;/// <summary>/// 自顶向下显示窗口,该标记可以在迁移转变动画和滑动动画中应用。应用AW_CENTER标记时忽视该标记/// </summary>public const int AW_VER_POSITIVE = 0x0004;/// <summary>/// 自下向上显示窗口,该标记可以在迁移转变动画和滑动动画中应用。应用AW_CENTER标记时忽视该标记该标记/// </summary>public const int AW_VER_NEGATIVE = 0x0008;/// <summary>/// 若应用了AW_HIDE标记,则使窗口向内重叠;不然向外扩大/// </summary>public const int AW_CENTER = 0x0010;/// <summary>/// 隐蔽窗口/// </summary>public const int AW_HIDE = 0x10000;/// <summary>/// 激活窗口,在应用了AW_HIDE标记后不要应用这个标记/// </summary>public const int AW_ACTIVE = 0x20000;/// <summary>/// 滑动类型动画结果,默认为迁移转变动画类型,当应用AW_CENTER标记时,这个标记就被忽视/// </summary>public const int AW_SLIDE = 0x40000;/// <summary>/// 淡入淡出结果/// </summary>public const int AW_BLEND = 0x80000;/// <summary>/// 窗体动画函数/// </summary>/// <param name="hwnd"></param>/// <param name="dwTime"></param>/// <param name="dwFlags"></param>/// <returns></returns>[DllImport("user32")]public static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);}}
定义显示消息窗体
using System;using System.Drawing;using System.Windows.Forms;namespace Fountain.WinForm.MessageBoxDemo{public partial class FormMessageBox : Form{/// <summary>/// 关闭窗口的定时器/// </summary>private Timer formCloseTime = new Timer();/// <summary>/// 构造方法/// </summary>public FormMessageBox(){InitializeComponent();}/// <summary>/// 窗体加载/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void FormMessageBox_Load(object sender, EventArgs e){// 手动设置起始位置this.StartPosition = FormStartPosition.Manual;// 计算屏幕尺寸并将窗体放置在右下角Rectangle screenRectangle = Screen.PrimaryScreen.WorkingArea;int x = screenRectangle.Width - this.Width;int y = screenRectangle.Height - this.Height;this.Location = new Point(x, y);this.TopMost = true;Win32.AnimateWindow(this.Handle, 1000, Win32.AW_SLIDE + Win32.AW_VER_NEGATIVE);this.ShowInTaskbar = false;formCloseTime.Interval = 5000;formCloseTime.Tick += new EventHandler(formCloseTime_Tick);formCloseTime.Start();}/// <summary>/// 关闭窗口的定时器响应事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void formCloseTime_Tick(object sender, EventArgs e){formCloseTime.Stop();this.Close();}/// <summary>////// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void FormMessageBox_FormClosed(object sender, FormClosedEventArgs e){formCloseTime.Stop();formCloseTime.Dispose();Win32.AnimateWindow(this.Handle, 1000, Win32.AW_SLIDE + Win32.AW_VER_POSITIVE + Win32.AW_HIDE);}}}
主界面调用
FormMessageBox formMessageBox = new FormMessageBox();formMessageBox.Show();
2、控制窗体显示
定义显示消息窗体
using System;using System.Drawing;using System.Threading;using System.Windows.Forms;namespace Fountain.WinForm.MessageBoxDemo{public partial class FormNotifyBox : Form{/// <summary>/// 关闭窗口的定时器/// </summary>private System.Windows.Forms.Timer formCloseTime = new System.Windows.Forms.Timer();/// <summary>////// </summary>private Point formPoint;/// <summary>////// </summary>public FormNotifyBox(){InitializeComponent();this.formPoint = new Point(Screen.PrimaryScreen.WorkingArea.Width - this.Width, Screen.PrimaryScreen.WorkingArea.Height);// 设置窗体在屏幕右下角显示this.Location = formPoint;}/// <summary>////// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void FormNotifyBox_Load(object sender, EventArgs e){try{formCloseTime.Interval = 5000;formCloseTime.Tick += new EventHandler(formCloseTime_Tick);formCloseTime.Start();this.TopMost = false;this.BringToFront();this.TopMost = true;this.PointToClient(this.formPoint);this.Location = this.formPoint;this.Show();for (int i = 0; i < this.Height; i++){this.Location = new Point(formPoint.X, formPoint.Y - i);// 消息框弹出速度，数值越大越慢Thread.Sleep(1);}}catch (Exception exception){}}/// <summary>/// 关闭窗口的定时器响应事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void formCloseTime_Tick(object sender, EventArgs e){formCloseTime.Enabled = false;for (int i = 0; i <= this.Height; i++){//弹出框向下移动消失Point point = new Point(this.Location.X, this.Location.Y + i);this.PointToScreen(point);//即时转换成屏幕坐标this.Location = point;//下降速度调节，数字越小消失的速度越快，建议不大于10Thread.Sleep(8);}this.Close();this.Dispose();}}}
主界面调用
FormNotifyBox notifyForm = new FormNotifyBox();notifyForm.Show();