[英]C# application closing problem
我希望我的應用程序能夠在單擊close(X)按鈕時將其最小化到系統托盤。
而且,只有在主應用程序窗口上單擊其他按鈕/菜單或單擊系統托盤上下文菜單項才能關閉它。
我能夠使窗口最小化以關閉托盤。
但是我面臨的問題是,我現在無法關閉該應用程序。
這是我的代碼(無法關閉該應用程序):
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void hideToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Visible = false;
}
private void showToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Visible = true;
}
private void quitToolStripMenuItem_Click(object sender, EventArgs e)
{
Application.DoEvents();
Application.Exit();
}
private void Form1_Resize(object sender, EventArgs e)
{
if (FormWindowState.Minimized == this.WindowState)
{
notifyIcon1.Visible = true;
notifyIcon1.ShowBalloonTip(500);
this.Hide();
}
else if (FormWindowState.Normal == this.WindowState)
{
notifyIcon1.Visible = false;
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
private void notifyIcon1_DoubleClick(object sender, EventArgs e)
{
this.Show();
this.WindowState = FormWindowState.Normal;
}
}
在按鈕中,設置一個字段,例如:
bool isClosing;
private void quitToolStripMenuItem_Click(object sender, EventArgs e)
{
isClosing = true;
Close();
}
並在“結束”中進行檢查:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if(!isClosing) {
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
}
這是因為它總是會在您取消事件的地方觸發表單關閉事件處理程序。
在此放置條件,如果表單已最小化,則跳過取消事件
在您要覆蓋關閉行為的地方添加一個標志,並通過檢查close事件參數上的CloseReason枚舉值來覆蓋其他退出情況。
bool m_NeedClose = false;
private void quitToolStripMenuItem_Click(object sender, EventArgs e)
{
m_NeedClose = true;
Close();
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if(m_NeedClose ||
(e.CloseReason != CloseReason.UserClosing))
{
return;
}
e.Cancel = true;
this.WindowState = FormWindowState.Minimized;
}
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