FormClosed与FormClosing事件的区别

Question

在VB.NET中，FormClosed和FormClosing事件有什么不同？

Private Sub frmTerminal_TCP_FormClosing(sender As Object, e As FormClosingEventArgs) Handles MyBase.FormClosing

End Sub


Private Sub frmTerminal_TCP_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed

End Sub

Answer 1

FormClosing发生在FormClosed之前。可以将FormClosing想象成在退出程序之前要求您保存文档的对话框。它为您提供了取消窗口终止的机会。

FormClosed在窗体关闭后触发。来自MS documentation

在用户或应用程序类的Close方法或Exit方法关闭窗体后发生FormClosed事件。若要防止窗体关闭，请处理FormClosing事件，并将传递给事件处理程序的CancelEventArgs的Cancel属性设置为true。