我有一个问题，我的手风琴面板带有动态生成的手风琴窗格，以及动态生成的控件，例如我的“btnVoucherProcess”按钮。现在我正在尝试使用“查找控件”方法访问我的按钮（btnVoucherProcess），如下所示：
For i As Int32 = 0 To acAccomodation.Panes.Count - 1
Dim btnVoucherProcess As Button CType(acAccomodation.FindControl("btnVoucherProcess" & i), Button) 'New Button("btnVoucherProcess" & i)
btnVoucherProcess.Text = "Saved " & i
Next
如果我运行此代码会引发错误，该错误告诉我我的按钮为空。如何访问手风琴内的按钮 (btnVoucherProcess)。
提前致谢。
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这是整个代码 代码在page_load中调用
The code that is called in page_load Private Sub emptyDaysAddMode(ByVal duration As Integer)
For i As Integer = 0 To duration - 1
Dim pn As New AjaxControlToolkit.AccordionPane()
pn.ID = "Pane" & i
pn.HeaderContainer.Controls.Add(accomodation(i, "", "", "", txtMarkup.Text, 0, 0, 0, 0, 0, 0))
pn.ContentContainer.Controls.Add(accomodationDetails(i))
acAccomodation.Panes.Add(pn)
'drRow(0) = i + 1
'dtExcel.Rows.Add(drRow)
Next
End Sub
Function accomodation(ByVal i As Int32, ByVal ID As String, ByVal dteDate As String, ByVal strDescription As String, ByVal Markup As Double, ByVal SGL As Int32, ByVal Twin As Int32, ByVal Triple As Int32, ByVal Child As Int32, ByVal Teen As Int32, ByVal ChildOR As Int32) As Table
accomodation = New Table()
Dim myTableRow As New TableRow
myTableRow.Width = Unit.Percentage(100)
Dim dayCell As New TableCell
Dim txtDay As TextBox = New TextBox
txtDay.ID = "txtDate" & i
txtDay.Text = dteDate
If txtDay.Text = "" And txtArrival.Text <> "" Then txtDay.Text = DateAdd("d", i, CType(txtArrival.Text, Date))
txtDay.Width = Unit.Pixel(70)
dayCell.Controls.Add(txtDay)
Dim lblAccID As Label = New Label
lblAccID.ID = "lblAccID" & i
lblAccID.Text = ID
lblAccID.Visible = False
dayCell.Controls.Add(lblAccID)
myTableRow.Cells.Add(dayCell)
Dim hotelRateCell As New TableCell
Dim txtHotelRate As TextBox = New TextBox
txtHotelRate.ID = "txtHotelRate" & i
txtHotelRate.Text = strDescription
txtHotelRate.Width = Unit.Pixel(295)
txtHotelRate.Attributes.Add("onkeyup", "javascript:Complete(this, event," & i & ")")
hotelRateCell.Controls.Add(txtHotelRate)
myTableRow.Cells.Add(hotelRateCell)
Dim markupCell As New TableCell
Dim txtmarkup As TextBox = New TextBox
txtmarkup.ID = "txtMarkup" & i
txtmarkup.Width = Unit.Pixel(35)
txtmarkup.Text = Markup
If txtmarkup.Text = 0 Then txtmarkup.Text = txtQuotationMarkup.Text
txtmarkup.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
markupCell.Controls.Add(txtmarkup)
myTableRow.Cells.Add(markupCell)
Dim nightCell As New TableCell
Dim txtnight As TextBox = New TextBox
txtnight.ID = "txtnight" & i
txtnight.Text = 1
txtnight.Width = Unit.Pixel(25)
txtnight.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
nightCell.Controls.Add(txtnight)
myTableRow.Cells.Add(nightCell)
Dim sglCell As New TableCell
Dim txtSGL As TextBox = New TextBox
txtSGL.ID = "txtSGL" & i
txtSGL.Width = Unit.Pixel(25)
txtSGL.Text = SGL
txtSGL.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
sglCell.Controls.Add(txtSGL)
myTableRow.Cells.Add(sglCell)
Dim DBLCell As New TableCell
Dim txtDBL As TextBox = New TextBox
txtDBL.ID = "txtDBL" & i
txtDBL.Width = Unit.Pixel(25)
txtDBL.Text = Twin
txtDBL.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
DBLCell.Controls.Add(txtDBL)
myTableRow.Cells.Add(DBLCell)
Dim trpCell As New TableCell
Dim txtTRP As TextBox = New TextBox
txtTRP.ID = "txtTRP" & i
txtTRP.Width = Unit.Pixel(25)
txtTRP.Text = Triple
txtTRP.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
trpCell.Controls.Add(txtTRP)
myTableRow.Cells.Add(trpCell)
Dim chdCell As New TableCell
Dim txtCHD As TextBox = New TextBox
txtCHD.ID = "txtCHD" & i
txtCHD.Width = Unit.Pixel(25)
txtCHD.Text = Child
txtCHD.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
chdCell.Controls.Add(txtCHD)
myTableRow.Cells.Add(chdCell)
Dim tnCell As New TableCell
Dim txtTN As TextBox = New TextBox
txtTN.ID = "txtTN" & i
txtTN.Width = Unit.Pixel(25)
txtTN.Text = Teen
txtTN.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
tnCell.Controls.Add(txtTN)
myTableRow.Cells.Add(tnCell)
Dim childOWRCell As New TableCell
Dim txtChildOWR As TextBox = New TextBox
txtChildOWR.ID = "txtchildOWR" & i
txtChildOWR.Width = Unit.Pixel(25)
txtChildOWR.Text = ChildOR
txtChildOWR.Attributes.Add("onchange", "javascript:accomodationCalc(" & i & ")")
childOWRCell.Controls.Add(txtChildOWR)
myTableRow.Cells.Add(childOWRCell)
Dim CostCell As New TableCell
Dim txtCost As TextBox = New TextBox
txtCost.ID = "txtCost" & i
txtCost.Width = Unit.Pixel(55)
txtCost.Enabled = False
CostCell.Controls.Add(txtCost)
myTableRow.Cells.Add(CostCell)
Dim SaleCell As New TableCell
Dim txtSale As TextBox = New TextBox
txtSale.ID = "txtSale" & i
txtSale.Width = Unit.Pixel(55)
txtSale.Enabled = False
SaleCell.Controls.Add(txtSale)
myTableRow.Cells.Add(SaleCell)
Dim ProfitCell As New TableCell
Dim txtProfit As TextBox = New TextBox
txtProfit.ID = "txtProfit" & i
txtProfit.Width = Unit.Pixel(60)
txtProfit.Enabled = False
ProfitCell.Controls.Add(txtProfit)
myTableRow.Cells.Add(ProfitCell)
Dim deleteCell As New TableCell
Dim chkAccDelete As CheckBox = New CheckBox
chkAccDelete.ID = "chkAccDelete" & i
chkAccDelete.Width = Unit.Pixel(60)
deleteCell.Controls.Add(chkAccDelete)
myTableRow.Cells.Add(deleteCell)
accomodation.Rows.Add(myTableRow)
Return accomodation
End Function
Function accomodationDetails(ByVal i As Int32) As Table
accomodationDetails = New Table()
accomodationDetails.BorderColor = Color.Black
accomodationDetails.BorderStyle = BorderStyle.Solid
'------1st Row
Dim tableRow1 As New TableRow
Dim mycell1 As New TableCell
mycell1.Text = "Description"
mycell1.BackColor = Color.Gray
'Dim tb As TextBox = New TextBox
tableRow1.Cells.Add(mycell1)
Dim mycell2 As New TableCell
mycell2.Text = "Single"
mycell2.BackColor = Color.Gray
tableRow1.Cells.Add(mycell2)
Dim mycell3 As New TableCell
mycell3.Text = "Double"
mycell3.BackColor = Color.Gray
tableRow1.Cells.Add(mycell3)
Dim mycell4 As New TableCell
mycell4.Text = "Triple"
mycell4.BackColor = Color.Gray
tableRow1.Cells.Add(mycell4)
Dim mycell5 As New TableCell
mycell5.Text = "Child"
mycell5.BackColor = Color.Gray
tableRow1.Cells.Add(mycell5)
Dim mycell6 As New TableCell
mycell6.Text = "Teen"
mycell6.BackColor = Color.Gray
tableRow1.Cells.Add(mycell6)
Dim mycell7 As New TableCell
mycell7.Text = "Child(OR)"
mycell7.BackColor = Color.Gray
tableRow1.Cells.Add(mycell7)
accomodationDetails.Rows.Add(tableRow1)
'------2nd Row
Dim tableRow2 As New TableRow
Dim mycell1R2 As New TableCell
mycell1R2.Text = "Cost"
tableRow2.Cells.Add(mycell1R2)
Dim mycell2R2 As New TableCell
Dim txtSingle As TextBox = New TextBox
txtSingle.ID = "txtSingle" & i
txtSingle.Width = Unit.Pixel(60)
mycell2R2.Controls.Add(txtSingle)
tableRow2.Cells.Add(mycell2R2)
Dim mycell3R2 As New TableCell
Dim txtDouble As TextBox = New TextBox
txtDouble.ID = "txtDouble" & i
txtDouble.Width = Unit.Pixel(60)
mycell3R2.Controls.Add(txtDouble)
tableRow2.Cells.Add(mycell3R2)
accomodationDetails.Rows.Add(tableRow2)
Dim mycell4R2 As New TableCell
Dim txtTriple As TextBox = New TextBox
txtTriple.ID = "txtTriple" & i
txtTriple.Width = Unit.Pixel(60)
mycell4R2.Controls.Add(txtTriple)
tableRow2.Cells.Add(mycell4R2)
accomodationDetails.Rows.Add(tableRow2)
Dim mycell5R2 As New TableCell
Dim txtChild As TextBox = New TextBox
txtChild.ID = "txtChild" & i
txtChild.Width = Unit.Pixel(60)
mycell5R2.Controls.Add(txtChild)
tableRow2.Cells.Add(mycell5R2)
accomodationDetails.Rows.Add(tableRow2)
Dim mycell6R2 As New TableCell
Dim txtTeen As TextBox = New TextBox
txtTeen.ID = "txtTeen" & i
txtTeen.Width = Unit.Pixel(60)
mycell6R2.Controls.Add(txtTeen)
tableRow2.Cells.Add(mycell6R2)
Dim mycell7R2 As New TableCell
Dim txtChildOR As TextBox = New TextBox
txtChildOR.ID = "txtChildOR" & i
txtChildOR.Width = Unit.Pixel(60)
mycell7R2.Controls.Add(txtChildOR)
tableRow2.Cells.Add(mycell7R2)
accomodationDetails.Rows.Add(tableRow2)
'------3rd Row
Dim tableRow3 As New TableRow
Dim mycell1R3 As New TableCell
mycell1R3.Text = "Sales"
tableRow3.Cells.Add(mycell1R3)
Dim mycell2R3 As New TableCell
Dim txtSingleSale As TextBox = New TextBox
txtSingleSale.ID = "txtSingleSale" & i
txtSingleSale.Width = Unit.Pixel(60)
mycell2R3.Controls.Add(txtSingleSale)
tableRow3.Cells.Add(mycell2R3)
Dim mycell3R3 As New TableCell
Dim txtDoubleSale As TextBox = New TextBox
txtDoubleSale.ID = "txtDoubleSale" & i
txtDoubleSale.Width = Unit.Pixel(60)
mycell3R3.Controls.Add(txtDoubleSale)
tableRow3.Cells.Add(mycell3R3)
Dim mycell4R3 As New TableCell
Dim txtTripleSale As TextBox = New TextBox
txtTripleSale.ID = "txtTripleSale" & i
txtTripleSale.Width = Unit.Pixel(60)
mycell4R3.Controls.Add(txtTripleSale)
tableRow3.Cells.Add(mycell4R3)
Dim mycell5R3 As New TableCell
Dim txtChildSale As TextBox = New TextBox
txtChildSale.ID = "txtChildSale" & i
txtChildSale.Width = Unit.Pixel(60)
mycell5R3.Controls.Add(txtChildSale)
tableRow3.Cells.Add(mycell5R3)
Dim mycell6R3 As New TableCell
Dim txtTeenSale As TextBox = New TextBox
txtTeenSale.ID = "txtTeenSale" & i
txtTeenSale.Width = Unit.Pixel(60)
mycell6R3.Controls.Add(txtTeenSale)
tableRow3.Cells.Add(mycell6R3)
Dim mycell7R3 As New TableCell
Dim txtChildORSale As TextBox = New TextBox
txtChildORSale.ID = "txtChildORSale" & i
txtChildORSale.Width = Unit.Pixel(60)
mycell7R3.Controls.Add(txtChildORSale)
tableRow3.Cells.Add(mycell7R3)
accomodationDetails.Rows.Add(tableRow3)
'-----4th Row
Dim tableRow4 As New TableRow
Dim mycell1R4 As New TableCell
mycell1R4.Text = "Voucher remarks"
tableRow4.Cells.Add(mycell1R4)
Dim mycell2R4 As New TableCell
mycell2R4.ColumnSpan = "6"
Dim txtVoucherRemarks As TextBox = New TextBox
txtVoucherRemarks.ID = "txtVoucherRemarks" & i
txtVoucherRemarks.Width = Unit.Pixel(420)
txtVoucherRemarks.TextMode = TextBoxMode.MultiLine
mycell2R4.Controls.Add(txtVoucherRemarks)
tableRow4.Cells.Add(mycell2R4)
accomodationDetails.Rows.Add(tableRow4)
'------5th Row
Dim tableRow5 As New TableRow
Dim mycell1R5 As New TableCell
Dim chkPark As New CheckBox
chkPark.ID = "chkPark" & i
chkPark.Text = "Include park fees."
mycell1R5.Text = ""
mycell1R5.Controls.Add(chkPark)
tableRow5.Cells.Add(mycell1R5)
Dim mycell2R5 As New TableCell
mycell2R5.ColumnSpan = "2"
Dim btnVoucherProcess As Button = New Button
btnVoucherProcess.ID = "btnVoucherProcess" & i
btnVoucherProcess.Width = Unit.Pixel(120)
btnVoucherProcess.Text = "Book"
mycell2R5.Controls.Add(btnVoucherProcess)
tableRow5.Cells.Add(mycell2R5)
Dim mycell3R5 As New TableCell
mycell3R5.ColumnSpan = "2"
Dim btnVoucherCancel As Button = New Button
btnVoucherCancel.ID = "btnVoucherCancel" & i
btnVoucherCancel.Width = Unit.Pixel(120)
btnVoucherCancel.Text = "Cancel voucher"
mycell3R5.Controls.Add(btnVoucherCancel)
tableRow5.Cells.Add(mycell3R5)
Dim mycell4R5 As New TableCell
mycell4R5.ColumnSpan = "2"
Dim btnVoucherPrint As Button = New Button
btnVoucherPrint.ID = "btnVoucherPrint" & i
btnVoucherPrint.Width = Unit.Pixel(120)
btnVoucherPrint.Text = "Print voucher"
mycell4R5.Controls.Add(btnVoucherPrint)
tableRow5.Cells.Add(mycell4R5)
accomodationDetails.Rows.Add(tableRow5)
Return accomodationDetails
End Function
以下代码由手风琴外的按钮触发
Protected Sub btnSaveAccomodation_Click(sender As Object, e As System.EventArgs) Handles btnSaveAccomodation.Click
For i As Int32 = 0 To acAccomodation.Panes.Count - 1
'For Each i As In Me.cdTransport.Items
' Dim btnVoucherProcess As Button = CType(acAccomodation.FindControl("btnVoucherProcess" & i), Button) 'New Button("btnVoucherProcess" & i)
Dim controlName As String = "btnVoucherProcess" & i
Dim btnVoucherProcess As Button = CType(acAccomodation.Panes(i).ContentContainer.FindControl("btnVoucherProcess" & i), Button)
btnVoucherProcess.Text = "Saved " & i
'Dim cboDay As DropDownList = CType(i.FindControl("cboDay"), DropDownList)
Next
End Sub