Question

我建立了用户控制,希望在用户点击表格时能够发现。

我看到。问题涉及但建议使用<代码> 离开活动总是不做我想要做的事情,因为当用户点击表格时,重点不一定会改变(我的控制可能是对形式的唯一控制,在这种情况下,重点仍然由我控制)。

任何想法?

我想能够在用户控制范围内做这样的事情:

Private Sub ParentForm_Click(sender As Object, e As System.EventArgs) _
    Handles Me.Parent.Click

End Sub

Answer 1

我将稍作改动:

Private _form As Control

Private Sub UserControl_ParentChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.ParentChanged

    If _form IsNot Nothing Then
        RemoveHandler _form.Click, AddressOf ParentOnClick
    End If

    _form = Me.FindForm()

    If _form IsNot Nothing Then
        AddHandler _form.Click, AddressOf ParentOnClick
    End If

End Sub

Private Sub ParentOnClick(ByVal sender As Object, ByVal e As EventArgs)
     ...
End Sub

这给它带来了更微薄的 res力——如果它不是形式的直接子女,如果其父母发生变化的话。

Answer 2

我对我感兴趣的任何人来说,是怎样做的:

Private _parentForm As Form

Private Sub UserControl_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    _parentForm = CType(Parent, Form)
    AddHandler _parentForm.Click, AddressOf ParentForm_Click
End Sub

Private Sub ParentForm_Click(sender As Object, e As System.EventArgs)
    debug.writeline("Parent form clicked")
End Sub

友情链接