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); } } }
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10 Thread.Sleep(8); } this.Close(); this.Dispose(); } } }
主界面调用
FormNotifyBox notifyForm = new FormNotifyBox(); notifyForm.Show();
