[英]how to show already instantiated (running) class Form1 from another class (ApplicationContext)
我有一個用於Application Context的類,除其他外,我還有一些方法可以將Form1類發送到系統托盤,我的問題是如何顯示已實例化的類From1,同時仍在系統托盤中運行,例如:
class MyApplicationContext : ApplicationContext
{
private NotifyIcon TrayIcon;
private ContextMenuStrip TrayIconContextMenu;
private ToolStripMenuItem CloseMenuItem;
private void TrayIcon_DoubleClick(object sender, EventArgs e)
{
// How to show Form1 hire.
}
//...
}
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//...
}
如果我實例化一個新類,它將給我新的形式,而我所有正在運行的進程都將消失,例如:
private void TrayIcon_DoubleClick(object sender, EventArgs e)
{
Form1 frm = new Form1();
frm.Show(); //How to show my form?
}
不知道原型模式是否可以在這里工作,有沒有更簡單的解決方案?
這是我的課:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Windows.Forms;
using System.Windows;
namespace DJBackupDB
{
class MyApplicationContext : ApplicationContext
{
//Component declarations
private NotifyIcon TrayIcon;
private ContextMenuStrip TrayIconContextMenu;
private ToolStripMenuItem CloseMenuItem;
public static Form1 form;
public MyApplicationContext()
{
Application.ApplicationExit += new EventHandler(this.OnApplicationExit);
InitializeComponent();
TrayIcon.Visible = true;
}
private void InitializeComponent()
{
TrayIcon = new NotifyIcon();
TrayIcon.BalloonTipIcon = ToolTipIcon.Info;
TrayIcon.BalloonTipText =
"I noticed that you double-clicked me! What can I do for you?";
TrayIcon.BalloonTipTitle = "You called Master?";
TrayIcon.Text = "My fabulous tray icon demo application";
//The icon is added to the project resources.
//Here I assume that the name of the file is 'TrayIcon.ico'
TrayIcon.Icon = Properties.Resources.logo;
//Optional - handle doubleclicks on the icon:
TrayIcon.DoubleClick += TrayIcon_DoubleClick;
//Optional - Add a context menu to the TrayIcon:
TrayIconContextMenu = new ContextMenuStrip();
CloseMenuItem = new ToolStripMenuItem();
TrayIconContextMenu.SuspendLayout();
//
// TrayIconContextMenu
//
this.TrayIconContextMenu.Items.AddRange(new ToolStripItem[] {
this.CloseMenuItem});
this.TrayIconContextMenu.Name = "TrayIconContextMenu";
this.TrayIconContextMenu.Size = new Size(153, 70);
//
// CloseMenuItem
//
this.CloseMenuItem.Name = "CloseMenuItem";
this.CloseMenuItem.Size = new Size(152, 22);
this.CloseMenuItem.Text = "Close the tray icon program";
this.CloseMenuItem.Click += new EventHandler(this.CloseMenuItem_Click);
TrayIconContextMenu.ResumeLayout(false);
TrayIcon.ContextMenuStrip = TrayIconContextMenu;
}
private void OnApplicationExit(object sender, EventArgs e)
{
//Cleanup so that the icon will be removed when the application is closed
TrayIcon.Visible = false;
}
private void TrayIcon_DoubleClick(object sender, EventArgs e)
{
form.Show();
}
private void CloseMenuItem_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Do you really want to close me?",
"Are you sure?", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button2) == DialogResult.Yes)
{
Application.Exit();
}
}
}
}
您必須將表單對象存儲在可以在事件中訪問它的地方。 就像為NotifyIcon和其他東西一樣,為表單創建一個類成員字段。
private Form1 form;
然后,當您創建ApplicationContext時,將表單字段設置為Form1對象。
然后在click事件處理程序中,您可以調用:
this.form.Show();
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