King的幸福國度

您可以在UserControl中宣告事件: 

Public Event DataChanged(ByVal s As String)      '宣告事件 

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        RaiseEvent DataChanged("Hello")                '在按鍵被點下時引發事件並傳出資料
End Sub 

在網頁中處理事件: 

Protected Sub WebUserControl1_DataChanged(ByVal s As String) Handles WebUserControl1.DataChanged
        Label1.Text = s                                          '利用UserControl傳出的資料更新網頁顯示的內容
End Sub