如何创建一个 UserControl，显示使用计时器以特定时间间隔重复的 NotifyIcon 的气球提示？

Question

我正在创建一个在用户定义的时间创建通知的应用程序。

基本上我用两个WinForms:

数字 1 用于获取通知数据并创建 NotificationObject class 的新实例，其中包含消息、标题、截止时间等通知数据。
Form 数字 2 用于跟踪通知。

程序启动时，Form 2 号打开，有一个按钮可以打开 Form 1 号。当 1 号表格关闭时，它会将通知数据保存到 NotificationObject class。 Form 数字 2 获取在 Form 数字 1 关闭时创建的 NotificationObject，并将其添加到 ObservableCollection。当向 ObservableCollection 添加某些内容时，它会创建一个带有构造函数参数 DueTime、Title 和 Message 的 UserControl。然后在 UserControl 中，我使用 System.Threading.Timer 和 NotifyIcon 创建通知。

即使我设置了 Callback 方法来创建 NotifyIcon 气球，它也没有显示任何东西。

Form number 1

public partial class NotificationCreator : Form
{
    public NotificationObject ntfObj;
    
    public NotificationCreator()
    {
        InitializeComponent();
    }
    
    private void createNotification_Click(object sender, EventArgs e)
    {
        if (String.IsNullOrEmpty(timeInput.Text))
        {
            MessageBox.Show(
                "Please set the time.",
                "Time is not set",
                MessageBoxButtons.OK,
                MessageBoxIcon.Error
            );
    
            return;
        }
    
        if (String.IsNullOrEmpty(titleInput.Text))
        {
            MessageBox.Show(
                "Please set the title.",
                "Title is not set",
                MessageBoxButtons.OK,
                MessageBoxIcon.Error
            );
    
            return;
        }
    
        if (String.IsNullOrEmpty(messageInput.Text))
        {
            MessageBox.Show(
                "Please set the message.",
                "Message is not set",
                MessageBoxButtons.OK,
                MessageBoxIcon.Error
            );
    
            return;
        }
    
        DateTime time = DateTime.Parse(timeInput.Text);
    
        DateTime dt = new DateTime(dateInput.Value.Year,
            dateInput.Value.Month,
            dateInput.Value.Day,
            time.Hour,
            time.Minute,
            0
        );
    
        ntfObj = new NotificationObject(dt, titleInput.Text, messageInput.Text);
    
        Close();
        Dispose();
    }
    
    private void timeInput_TextChanged(object sender, EventArgs e)
    {
        if (timeInput.Text.Length == 5)
        {
            try
            {
                DateTime dummy = DateTime.Parse(timeInput.Text);
    
                if (dummy.Hour <= DateTime.Now.Hour && dummy.Minute <= DateTime.Now.Minute && dummy.Hour != 00 && dummy.Minute != 00)
                {
                    MessageBox.Show("Please set the time for future",
                        "Invalid time",
                        MessageBoxButtons.OK,
                        MessageBoxIcon.Error);
    
                    return;
                }
    
                return;
            }
            catch
            {
                MessageBox.Show("Please set a valid time",
                    "Invalid time",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Error);
                return;
            }
        }
    }
    
    private void dateInput_ValueChanged(object sender, EventArgs e)
    {
        if (dateInput.Value < DateTime.Now.AddDays(-1))
        {
            MessageBox.Show("Please set the date for future.",
                "Invalid date",
                MessageBoxButtons.OK,
                MessageBoxIcon.Error);
    
                dateInput.Value = DateTime.Now;
                    
                return;
            }
        }
    }
}

Form number 2

public partial class TrackingPanel : Form
{
    ObservableCollection<NotificationObject> ntfList = new ObservableCollection<NotificationObject>();

    public TrackingPanel()
    {
        InitializeComponent();

        ntfList.CollectionChanged += NtfList_CollectionChanged;
    }

    private void NtfList_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
    {
        if (e.Action == NotifyCollectionChangedAction.Add)
        {
            NotificationObject ntfObj = e.NewItems[0] as NotificationObject;

            Notification ntf = new Notification(ntfObj.DueTime, ntfObj.ntfTitle, ntfObj.ntfMessage);

            ntfPanel.Controls.Add(ntf);
        }
    }

    private void TrackingPanel_Load(object sender, EventArgs e)
    {}

    private void TrackingPanel_Resize(object sender, EventArgs e)
    {
        if (WindowState == FormWindowState.Minimized)
        {}
    }

    private void createNotification_Click(object sender, EventArgs e)
    {
        NotificationCreator Tool = new NotificationCreator();
        Tool.ShowDialog();

        ntfList.Add(Tool.ntfObj);
    }
}

NotificationObject

/// <summary>
/// An object that represents the Notification and contains Notification information.
/// </summary>
public class NotificationObject
{
    /// <summary>
    /// Notification due time.
    /// </summary>
    public DateTime DueTime { get; set; }
    /// <summary>
    /// Title of Notification.
    /// </summary>
    public string ntfTitle { get; set; }
    /// <summary>
    /// Notification Message.
    /// </summary>
    public string ntfMessage{ get; set; }

    public NotificationObject(DateTime dueTime, string title, string message)
    {
        DueTime = dueTime;
        ntfTitle = title;
        ntfMessage = message;
    }
}

UserControl

 public partial class Notification : UserControl
    {
        private readonly System.Threading.Timer timer;

        public Notification(DateTime dt, string Title, string Message)
        {
            InitializeComponent();

            this.Title.Text = Title;
            this.Message.Text = Message;

            ntfIco.Visible = false;

            timer = new System.Threading.Timer(NotificationOccurs, null, dt - DateTime.Now, TimeSpan.FromSeconds(20));
        }

        private void NotificationOccurs(object state)
        {
            ntfIco.Visible = true;

            ntfIco.ShowBalloonTip(3500, Title.Text, Message.Text, ToolTipIcon.Info);

            ntfIco.Visible = false;
        }

        private void Notification_Load(object sender, EventArgs e)
        {
            ntfPic.Image = Properties.Resources.Search_Png;
        }
    }

编辑

我在 UserControl 中使用了 System.Windows.Forms.Timer，但仍然没有用。

public partial class Notification : UserControl
    {
        public Notification(DateTime dt, string Title, string Message)
        {
            InitializeComponent();

            this.Title.Text = Title;
            this.Message.Text = Message;

            ntfIco.Visible = false;

            Timer.Interval = (int)(dt - DateTime.Now).TotalMilliseconds;

            Timer.Start();
            
        }

        private void Notification_Load(object sender, EventArgs e)
        {
            ntfPic.Image = Properties.Resources.Search_Png;
        }

        private void Timer_Tick(object sender, EventArgs e)
        {
            ntfIco.Visible = true;

            ntfIco.ShowBalloonTip(3500, Title.Text, Message.Text, ToolTipIcon.Info);

            Timer.Interval = 10 * 1000;

            ntfIco.Visible = false;
        }
    }

Answer 1

来自评论讨论：

一定要设置通知图标的Icon属性。
让 WinForms 计时器与 UI 线程一起工作。
不要在气球提示弹出后立即将通知图标设置为 false，否则它会关闭。
让气球尖自己褪色。
如果要隐藏通知图标，请在 BallonTipClosed 事件中执行此操作。

private void Timer_Tick(object sender, EventArgs e)
{
  ntfIco.Visible = true;
  ntfIco.ShowBalloonTip(3500, Title.Text, Message.Text, ToolTipIcon.Info);
  Timer.Interval = 10 * 1000;
}

public Notification(DateTime dt, string Title, string Message)
{
  InitializeComponent();
  this.Title.Text = Title;
  this.Message.Text = Message;
  ntfIco.Visible = false;

  ntfIco.BalloonTipClosed += (sender, e) => ntfIco.Visible = false;

  Timer.Interval = (int)( dt - DateTime.Now ).TotalMilliseconds;
  Timer.Start();
}

如何创建一个 UserControl，显示使用计时器以特定时间间隔重复的 NotifyIcon 的气球提示？

How to create a UserControl showing a balloon tip from a NotifyIcon repeated at a certain interval using a timer?

c#

winforms

timer

user-controls

notifyicon