在Form1结束事件中,有时我会在选择YES以关闭该行上的应用程序时收到异常:
Environment.Exit(0);
这是Form1结束事件代码:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("Are you Sure you want to Exit. Click Yes to Confirm and No to continue", "WinForm", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
{
e.Cancel = true;
}
else
{
e.Cancel = false;
Environment.Exit(0);
}
}
例外:创建窗口句柄时出错
这是完整的异常错误消息:
System.ComponentModel.Win32Exception was unhandled
HResult=-2147467259
Message=Error creating window handle.
Source=System.Windows.Forms
ErrorCode=-2147467259
NativeErrorCode=1406
StackTrace:
at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Control.get_Handle()
at System.Windows.Forms.VisualStyles.VisualStyleRenderer.DrawParentBackground(IDeviceContext dc, Rectangle bounds, Control childControl)
at System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintThemedButtonBackground(PaintEventArgs e, Rectangle bounds, Boolean up)
at System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintWorker(PaintEventArgs e, Boolean up, CheckState state)
at System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintUp(PaintEventArgs e, CheckState state)
at System.Windows.Forms.ButtonInternal.ButtonBaseAdapter.Paint(PaintEventArgs pevent)
at System.Windows.Forms.ButtonBase.OnPaint(PaintEventArgs pevent)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
InnerException:
也许我需要释放/关闭/处置我没有的东西?
有时会出现异常,但有时候现在没有我试图连续5次关闭应用程序而没有任何例外。
答案 0 :(得分:3)
您实际上并不需要else
条件 - 如果他们选择“否”,您只需让表单关闭即可。我可以看到调用Environment.Exit(0)
的唯一明显原因是当你有非模态形式(或其他过程)时,你也想要/需要关闭。最好循环查看子表单并触发其紧密事件。我曾经使用过这样的东西:
// Close each child window of this form
foreach ( Window window in Application.Current.Windows )
{
if ( window != null && window.Owner == this )
{
window.Close();
}
}
已经有一段时间了,但我相信您必须在创建表单时手动将Owner
属性分配给表单。
当然,您可能有其他完全正确的理由致电Environment.Exit(0)
。