如何通過單擊用戶控件上的按鈕來更新窗體上的文本框

Question

我需要在單擊用戶控件上的按鈕時更新文本框的文本。

我該怎麼做？

Answer 1

聲明在用戶控件的事件，並有按鈕的Click事件提出來：

Public Class UserControl1 
    Public Event MyButtonClick As EventHandler(Of MyButtonClickEventArgs) 

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 
    RaiseEvent MyButtonClick(Me, New MyButtonClickEventArgs("nobugz")) 
    End Sub 

    Public Class MyButtonClickEventArgs 
    Inherits EventArgs 
    Private mText As String 
    Public Sub New(ByVal text As String) 
     mText = text 
    End Sub 
    Public ReadOnly Property Text() As String 
     Get 
     Return mText 
     End Get 
    End Property 
    End Class 

End Class 

現在承載需要的用戶控件可以訂閱事件和更新文本框的形式：

Private Sub UserControl11_MyButtonClick(ByVal sender As System.Object, ByVal e As WindowsApplication1.UserControl1.MyButtonClickEventArgs) Handles UserControl11.MyButtonClick 
    TextBox1.Text = e.Text 
    End Sub 

Answer 2

而我如何從用戶控件發送字符串到表單？

我需要從用戶控件發送數據到thr表單並在文本框中讀取它。例如：

Private Sub UserControl11_MyButtonClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles UserControl11.MyButtonClick 
    TextBox1.Text = e.mystring 
End Sub