vb.net - FormClosed和FormClosing事件之间的区别

Question

在VB.NET中，FormClosed和FormClosing事件有什么区别？

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视为对话框，要求您在退出程序之前保存文档。它为您提供了取消窗口终止的机会。

表单关闭后会触发FormClosed。从MS documentation:

The FormClosed event occurs after the form has been closed by the user or by the Close method or the Exit method of the Application class. To prevent a form from closing, handle the FormClosing event and set the Cancel property of the CancelEventArgs passed to your event handler to true.