WindowsForm實現(xiàn)警告消息框的實例代碼

更新時間：2020年07月18日 09:23:47 作者：zhuanghamiao

這篇文章主要介紹了WindowsForm如何實現(xiàn)警告消息框，文中講解非常細致，代碼幫助大家更好的理解和學習，感興趣的朋友可以了解下

警告消息框主要是用來向用戶戶展示諸如警告、異常、完成和提示消息。一般實現(xiàn)的效果就是從系統(tǒng)窗口右下角彈出，然后加上些簡單的顯示和消失的動畫。

創(chuàng)建警告框窗口

首先我們創(chuàng)建一個警告框窗口(Form)，將窗口設(shè)置為無邊框(FormBoderStyle=None)，添加上圖片和內(nèi)容顯示控件

創(chuàng)建好警告框后，我們先讓他能夠從窗口右下角顯示出來,

  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();
    }
  }

警告框顯示和關(guān)閉動畫

添加一個計時器，通過時鐘控制窗口背景漸入和淡出

  // 警告框的行為（顯示，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;//警告顯示的時間
          this.Opacity += 0.1;
          if (this.Opacity == 1.0)
          {
            action = AlertFormAction.Wait;
          }
          break;
        case AlertFormAction.Wait:
          timer1.Interval = 3000;//警告框停留時間
          action = AlertFormAction.Close;
          break;
        case AlertFormAction.Close:
          timer1.Interval = 50;//警告退出的時間
          this.Opacity -= 0.1;
          if (this.Opacity == 0.0)
          {
            this.Close();
          }
          break;
        default:
          break;
      }
    }

    public void Show(string message)
    {
      //設(shè)置窗口啟始位置
      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;
      //啟動時鐘
      timer1.Start();
    }
  }

處理多種不同類型的警告框

添加AlertType枚舉，讓警告框顯示不同類型的消息，根據(jù)消息類型變換不同的消息主題顏色,并未Show方法添加警告框類型參數(shù)

  public enum AlertType
  {
    Info,
    Success,
    Warning,
    Error
  }

 // 設(shè)置警告框主題
 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;
   }
 }

 // 顯示警告框
 public void Show(string message, AlertType type){
  // ...
  SetAlertTheme(type);
 }

處理多個警告框重疊問題

當然，完成上面的處理是不夠的，當有多個消息的時候，消息框會重疊在一起；多個消息時，需要將消息窗口按一定的規(guī)則排列，這里我們設(shè)置每個消息窗口間隔一定的距離

    public void Show(string message, AlertType type)
    {
      // 設(shè)置窗口啟始位置
      this.StartPosition = FormStartPosition.Manual;

      // 設(shè)置程序每個打開的消息窗口的位置，超過10個就不做處理，這個可以根據(jù)自己的需求設(shè)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;
      //啟動時鐘
      timer1.Start();
    }

鼠標懸停警告框處理

想要警告框停留的時間長一些，一中方式是直接設(shè)置警告框停留的時間長一些，另一種方式是通過判斷鼠標在警告框窗口是否懸停，所以可以通過鼠標的懸停和離開事件進行處理

    private void AlertMessageForm_MouseMove(object sender, MouseEventArgs e)
    {
      this.Opacity = 1.0;
      timer1.Interval = int.MaxValue;//警告框停留時間
      action = AlertFormAction.Close;
    }

    private void AlertMessageForm_MouseLeave(object sender, EventArgs e)
    {
      this.Opacity = 1.0;
      timer1.Interval = 3000;//警告框停留時間
      action = AlertFormAction.Close;
    }

警告框的完整代碼

  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;//警告顯示的時間
          this.Opacity += 0.1;
          if (this.Opacity == 1.0)
          {
            action = AlertFormAction.Wait;
          }
          break;
        case AlertFormAction.Wait:
          timer1.Interval = 3000;//警告框停留時間
          action = AlertFormAction.Close;
          break;
        case AlertFormAction.Close:
          timer1.Interval = 50;//警告關(guān)閉的時間
          this.Opacity -= 0.1;
          if (this.Opacity == 0.0)
          {
            this.Close();
          }
          break;
        default:
          break;
      }
    }

    public void Show(string message, AlertType type)
    {
      // 設(shè)置窗口啟始位置
      this.StartPosition = FormStartPosition.Manual;

      // 設(shè)置程序每個打開的消息窗口的位置，超過10個就不做處理，這個可以根據(jù)自己的需求設(shè)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;
      //啟動時鐘
      timer1.Start();
    }

    private void AlertMessageForm_MouseMove(object sender, MouseEventArgs e)
    {
      this.Opacity = 1.0;
      timer1.Interval = int.MaxValue;//警告框停留時間
      action = AlertFormAction.Close;
    }

    private void AlertMessageForm_MouseLeave(object sender, EventArgs e)
    {
      this.Opacity = 1.0;
      timer1.Interval = 3000;//警告框停留時間
      action = AlertFormAction.Close;
    }

    private void buttonClose_Click(object sender, EventArgs e)
    {
      // 注銷鼠標事件
      this.MouseLeave-= new System.EventHandler(this.AlertMessageForm_MouseLeave);
      this.MouseMove -= new System.Windows.Forms.MouseEventHandler(this.AlertMessageForm_MouseMove);

      timer1.Interval = 50;//警告關(guān)閉的時間
      this.Opacity -= 0.1;
      if (this.Opacity == 0.0)
      {
        this.Close();
      }
    }

    // 設(shè)置警告框主題
    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實現(xiàn)警告消息框的實例代碼的詳細內(nèi)容，更多關(guān)于WindowsForm實現(xiàn)警告消息框的資料請關(guān)注腳本之家其它相關(guān)文章！

您可能感興趣的文章: