為動態按鈕創建處理程序

Question

我想為動態創建的按鈕添加處理。 我在 Stack 上看到的最接近的代碼是： asp.net dynamic button with event handler

我有下面的代碼，可以創建一個按鈕，但我想為每個按鈕都有一個處理程序。

到目前為止我的代碼：

Dim control As LiteralControl
        control = New LiteralControl("<div class=""bar-row"">" & _
                                     "  <input value=""" & button & """ id=""" & id & """ class=""btnRisk"" type=""submit"">" & _
                                     "  <div class=""bar-data"">" & _
                                     "      <div class=""bar-inner"">" & _
                                     "          <div class=""bar bar-high"" style=""width: " & highPer & "%"">" & high & "</div>" & _
                                     "          <div class=""bar bar-med"" style=""width: " & medPer & "%"">" & medium & "</div>" & _                                      
                                     "      </div>" & _
                                     "  </div>" & _
                                     "</div>")
        ChartArea.Controls.Add(control)

重要的部分是：

"  <input value=""" & button & """ id=""" & id & """ class=""btnRisk""     type=""submit"">"

我不知道如何修改這個。

我需要將按鈕 ID 傳遞給發件人，然后執行某些操作，即

Public Sub Buttons(ByVal sender As Object, ByVal e As EventArgs)

If sender = "1" Then
'do something
End If
If sender ="2" Then
'something else
End If 
End Sub

版本 2

ChartArea.Controls.Add(New LiteralControl("<div class=""bar-row"">"))

        Dim vRiskActive As String = "btnRisk "
        If id <> "btnMech" Then vRiskActive = vRiskActive + " risk-inactive"

        Dim btnButton As New Button() With {.Text = button, .ID = id, .CssClass = vRiskActive}
        AddHandler btnButton.Click, AddressOf button ' here Buttons is your Handler  

        ChartArea.Controls.Add(btnButton)

        If id = "ContentMain_btnMech" Then
            ChartArea.Controls.Add(New LiteralControl("  <div class=""bar-data"">" &
                                                     "      <div class=""bar-inner"">" &
                                                     "          <div class=""bar bar-high"" style=""width: " & highPer & "%"">" & high & "</div>" &
                                                     "          <div class=""bar bar-med"" style=""width: " & medPer & "%"">" & medium & "</div>" &
                                                      "          <div class=""bar bar-low"" style=""width: " & lowhPer & "%"">" & low & "</div>" &
                                                    "          <div class=""bar bar-na"" style=""width: " & naPer & "%"">" & na & "</div>" &
        "      </div>" &
                                                     "  </div>" &
                                                     "</div>"))
        Else
            ChartArea.Controls.Add(New LiteralControl("  <div class=""bar-data"">" &
                                     "      <div class=""bar-inner bar-inactive"">" &
                                    "  </div>" &
                                    "  </div>" &
                                                     "</div>"))
        End If

值得注意的子部分...

Public Sub AddChartRow(ByVal button As String, ByVal id As String, ByVal high As Integer, ByVal medium As Integer, ByVal low As Integer, ByVal na As Integer)

Answer 1

我會建議更改您的 HTML 代碼並創建一個按鈕。 同樣在創建按鈕后，您可以嘗試為按鈕的事件添加處理程序。

ChartArea.Controls.Add(New LiteralControl("<div class=""bar-row"">"))

Dim btnButton As new Button() With { .Text = button,
                                     .Id = id,
                                     .CssClass = "btnRisk"
                                   }

AddHandler btnButton.Click, AddressOf ButtonsID ' here Buttons is your Handler        

ChartArea.Controls.Add(btnButton)
ChartArea.Controls.Add(New LiteralControl("  <div class=""bar-data"">" & _
                                             "      <div class=""bar-inner"">" & _
                                             "          <div class=""bar bar-high"" style=""width: " & highPer & "%"">" & high & "</div>" & _
                                             "          <div class=""bar bar-med"" style=""width: " & medPer & "%"">" & medium & "</div>" & _                                      
                                             "      </div>" & _
                                             "  </div>" & _
                                             "</div>"))
                ChartArea.Controls.Add(control)

更多關於 AdressOf Operator 的信息可以在MSDN 中找到