如何在动态按钮上创建动态按钮单击事件 - VB.net

Question

我正在动态地在页面上创建一个按钮。现在我想在该按钮上使用按钮单击事件。我如何在 VB.net 和 asp.net 中做到这一点？

我的代码：

页面加载：

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
            Try
               LoadControls()
             Catch ex As Exception

            End Try
        End Sub

加载控件

   Private Sub LoadControls()
    Try
       Dim ButtonTable As New HtmlTable
       Dim ButtonTableRow As New HtmlTableRow
       Dim ButtonTableCell As New HtmlTableCell
       Dim btnCode As New Button
           btnCode.ID = "btnCode"
           btnCode.Text = "btnCode"
           AddHandler btnCode.Click, AddressOf btnCode_Click
       ButtonTableCell.Controls.Add(btnCode)

       ButtonTableRow.Cells.Add(ButtonTableCell)
       ButtonTable.Rows.Add(ButtonTableRow)

       ControlsPlaceHolder.Controls.Add(ButtonTable)
 Catch ex As Exception

        End Try
    End Sub

事件处理程序

Private Sub btnCode_Click(sender As Object, e As EventArgs)

            Dim buttonId As New Button
            Try
                buttonId = DirectCast(sender, Button)

                // My execution
            Catch ex As Exception

            End Try
        End Sub

问题：

事件处理程序不会出现..!!它会引发错误

Multiple controls with the same ID were found

这段代码有什么问题..!!

Answer 1

创建动态按钮后，您的事件处理程序btnCode_Click“订阅”按钮事件：

AddHandler btnCode.Click, AddressOf btnCode_Click

那么EventHandler 必须至少是Protected，但你是Private - 那就不能访问了