警告消息框主要是用来向用户户展示诸如警告、异常、完成和提示消息。一般实现的效果就是从系统窗口右下角弹出，然后加上些简单的显示和消失的动画。
创建警告框窗口
首先我们创建一个警告框窗口(Form)，将窗口设置为无边框(FormBoderStyle=None)，添加上图片和内容显示控件
创建好警告框后，我们先让他能够从窗口右下角显示出来,
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public partial class AlertMessageForm : Form{ public AlertMessageForm() { InitializeComponent(); } private int x, y; public void Show(string message) { this.StartPosition = FormStartPosition.Manual; this.x = Screen.PrimaryScreen.WorkingArea.Width - this.Width; this.y = Screen.PrimaryScreen.WorkingArea.Height - this.Height; this.Location = new Point(x, y); labelContent.Text = message; this.Show(); }} |
警告框显示和关闭动画
添加一个计时器，通过时钟控制窗口背景渐入和淡出
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// 警告框的行为（显示，停留，退出）public enum AlertFormAction{ Start, Wait, Close}public partial class AlertMessageForm : Form{ public AlertMessageForm() { InitializeComponent(); } private int x, y; private AlertFormAction action; private void timer1_Tick(object sender, EventArgs e) { switch (action) { case AlertFormAction.Start: timer1.Interval = 50;//警告显示的时间 this.Opacity += 0.1; if (this.Opacity == 1.0) { action = AlertFormAction.Wait; } break; case AlertFormAction.Wait: timer1.Interval = 3000;//警告框停留时间 action = AlertFormAction.Close; break; case AlertFormAction.Close: timer1.Interval = 50;//警告退出的时间 this.Opacity -= 0.1; if (this.Opacity == 0.0) { this.Close(); } break; default: break; } } public void Show(string message) { //设置窗口启始位置 this.StartPosition = FormStartPosition.Manual; this.x = Screen.PrimaryScreen.WorkingArea.Width - this.Width; this.y = Screen.PrimaryScreen.WorkingArea.Height - this.Height; this.Location = new Point(x, y); labelContent.Text = message; this.Opacity = 0.0; this.Show(); action = AlertFormAction.Start; //启动时钟 timer1.Start(); }} |
处理多种不同类型的警告框
添加AlertType枚举，让警告框显示不同类型的消息，根据消息类型变换不同的消息主题颜色,并未Show方法添加警告框类型参数
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public enum AlertType { Info, Success, Warning, Error }// 设置警告框主题private void SetAlertTheme(AlertType type){ switch (type) { case AlertType.Info: this.pictureBox1.Image = Properties.Resources.info; this.BackColor = Color.RoyalBlue; break; case AlertType.Success: this.pictureBox1.Image = Properties.Resources.success; this.BackColor = Color.SeaGreen; break; case AlertType.Warning: this.pictureBox1.Image = Properties.Resources.warning; this.BackColor = Color.DarkOrange; break; case AlertType.Error: this.pictureBox1.Image = Properties.Resources.error; this.BackColor = Color.DarkRed; break; default: break; }}// 显示警告框public void Show(string message, AlertType type){ // ... SetAlertTheme(type);} |
处理多个警告框重叠问题
当然，完成上面的处理是不够的，当有多个消息的时候，消息框会重叠在一起；多个消息时，需要将消息窗口按一定的规则排列，这里我们设置每个消息窗口间隔一定的距离
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public void Show(string message, AlertType type){ // 设置窗口启始位置 this.StartPosition = FormStartPosition.Manual; // 设置程序每个打开的消息窗口的位置，超过10个就不做处理，这个可以根据自己的需求设定 string fname; for (int i = 1; i < 10; i++) { fname = "alert" + i.ToString(); AlertMessageForm alert = (AlertMessageForm)Application.OpenForms[fname]; if (alert == null) { this.Name = fname; this.x = Screen.PrimaryScreen.WorkingArea.Width - this.Width; this.y = Screen.PrimaryScreen.WorkingArea.Height - this.Height * i - 5 * i; this.Location = new Point(x, y); break; } } labelContent.Text = message; this.Opacity = 0.0; SetAlertTheme(type); this.Show(); action = AlertFormAction.Start; //启动时钟 timer1.Start();} |
鼠标悬停警告框处理
想要警告框停留的时间长一些，一中方式是直接设置警告框停留的时间长一些，另一种方式是通过判断鼠标在警告框窗口是否悬停，所以可以通过鼠标的悬停和离开事件进行处理
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private void AlertMessageForm_MouseMove(object sender, MouseEventArgs e){ this.Opacity = 1.0; timer1.Interval = int.MaxValue;//警告框停留时间 action = AlertFormAction.Close;}private void AlertMessageForm_MouseLeave(object sender, EventArgs e){ this.Opacity = 1.0; timer1.Interval = 3000;//警告框停留时间 action = AlertFormAction.Close;} |
警告框的完整代码
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public enum AlertType{ Info, Success, Warning, Error}public enum AlertFormAction{ Start, Wait, Close}public partial class AlertMessageForm : Form{ public AlertMessageForm() { InitializeComponent(); } private int x, y; private AlertFormAction action; private void timer1_Tick(object sender, EventArgs e) { switch (action) { case AlertFormAction.Start: timer1.Interval = 50;//警告显示的时间 this.Opacity += 0.1; if (this.Opacity == 1.0) { action = AlertFormAction.Wait; } break; case AlertFormAction.Wait: timer1.Interval = 3000;//警告框停留时间 action = AlertFormAction.Close; break; case AlertFormAction.Close: timer1.Interval = 50;//警告关闭的时间 this.Opacity -= 0.1; if (this.Opacity == 0.0) { this.Close(); } break; default: break; } } public void Show(string message, AlertType type) { // 设置窗口启始位置 this.StartPosition = FormStartPosition.Manual; // 设置程序每个打开的消息窗口的位置，超过10个就不做处理，这个可以根据自己的需求设定 string fname; for (int i = 1; i < 10; i++) { fname = "alert" + i.ToString(); AlertMessageForm alert = (AlertMessageForm)Application.OpenForms[fname]; if (alert == null) { this.Name = fname; this.x = Screen.PrimaryScreen.WorkingArea.Width - this.Width; this.y = Screen.PrimaryScreen.WorkingArea.Height - this.Height * i - 5 * i; this.Location = new Point(x, y); break; } } labelContent.Text = message; this.Opacity = 0.0; SetAlertTheme(type); this.Show(); action = AlertFormAction.Start; //启动时钟 timer1.Start(); } private void AlertMessageForm_MouseMove(object sender, MouseEventArgs e) { this.Opacity = 1.0; timer1.Interval = int.MaxValue;//警告框停留时间 action = AlertFormAction.Close; } private void AlertMessageForm_MouseLeave(object sender, EventArgs e) { this.Opacity = 1.0; timer1.Interval = 3000;//警告框停留时间 action = AlertFormAction.Close; } private void buttonClose_Click(object sender, EventArgs e) { // 注销鼠标事件 this.MouseLeave-= new System.EventHandler(this.AlertMessageForm_MouseLeave); this.MouseMove -= new System.Windows.Forms.MouseEventHandler(this.AlertMessageForm_MouseMove); timer1.Interval = 50;//警告关闭的时间 this.Opacity -= 0.1; if (this.Opacity == 0.0) { this.Close(); } } // 设置警告框主题 private void SetAlertTheme(AlertType type) { switch (type) { case AlertType.Info: this.pictureBox1.Image = Properties.Resources.info; this.BackColor = Color.RoyalBlue; break; case AlertType.Success: this.pictureBox1.Image = Properties.Resources.success; this.BackColor = Color.SeaGreen; break; case AlertType.Warning: this.pictureBox1.Image = Properties.Resources.warning; this.BackColor = Color.DarkOrange; break; case AlertType.Error: this.pictureBox1.Image = Properties.Resources.error; this.BackColor = Color.DarkRed; break; default: break; } }} |
以上就是WindowsForm实现警告消息框的实例代码的详细内容，更多关于WindowsForm实现警告消息框的资料请关注服务器之家其它相关文章！
原文链接：https://www.cnblogs.com/zhuanghamiao/p/winform-alert.html
