ASP.Net中动态控件的回发事件问题
我目前正在处理一个页面,该页面有一个用于构建动态表的用户控件。控件最初加载在Page_Init事件上,每当引发更改动态控件的事件时,表都会重新加载。这里的问题是,如果控件在两个负载之间更改,则控件中的事件不会触发。例如,表中最初有两行。在回发期间,一个项目被添加到表中,现在有四行(此表一次添加两行)。每行有一个或两个按钮。加载页面并将其发送回浏览器时,如果用户单击任何按钮,则会发生回发,但不会触发事件。我做错了什么?如何判断是什么控制/事件导致回发?下面是页面和用户控件的代码 支付。aspx:ASP.Net中动态控件的回发事件问题,asp.net,dynamic,postback,Asp.net,Dynamic,Postback,我目前正在处理一个页面,该页面有一个用于构建动态表的用户控件。控件最初加载在Page_Init事件上,每当引发更改动态控件的事件时,表都会重新加载。这里的问题是,如果控件在两个负载之间更改,则控件中的事件不会触发。例如,表中最初有两行。在回发期间,一个项目被添加到表中,现在有四行(此表一次添加两行)。每行有一个或两个按钮。加载页面并将其发送回浏览器时,如果用户单击任何按钮,则会发生回发,但不会触发事件。我做错了什么?如何判断是什么控制/事件导致回发?下面是页面和用户控件的代码 支付。aspx:
Partial Public Class Payments
Inherits BasePage
Private foodMaster As Food
Private _check As BusinessLayer.CustomerCheck
Private Sub btnAddCheck_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddCheck.Click
' do nothing. the modal window is tied to the button via the modal window in the designer
End Sub
Private Sub btnCalendar_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles btnCalendar.Click
calCheckDate.Visible = Not calCheckDate.Visible
modCheck.Show()
End Sub
Private Sub btnCheckSave_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnCheckSave.Click
Try
If IsNothing(_check) Then _check = New BusinessLayer.CustomerCheck
If Me.CurrentCheck > 0 Then _check.CheckId = Me.CurrentCheck
_check.CheckNumber = txtCheckNumber.Text
_check.CheckDate = CDate(txtCheckDate.Text)
_check.CheckAmount = CDbl(txtCheckAmount.Text)
_check.DepositId = Me.CurrentDeposit
_check.Save()
LoadControls()
' reset the current check to not get confused after an edit
Me.CurrentCheck = 0
SetupNewCheck()
Catch ex As Exception
lblMessage.Text = "Could not save check."
lblMessage.Visible = True
modCheck.Show()
End Try
End Sub
Private Sub calCheckDate_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles calCheckDate.SelectionChanged
txtCheckDate.Text = calCheckDate.SelectedDate.ToShortDateString()
calCheckDate.Visible = False
modCheck.Show()
End Sub
Private Sub cvFutureDate_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles cvFutureDate.ServerValidate
Try
Dim depositDate As DateTime = DateTime.Parse(txtCheckDate.Text)
Dim futureDate As DateTime = Now.AddDays(1)
Dim tomorrow As New DateTime(futureDate.Year, futureDate.Month, futureDate.Day)
args.IsValid = CBool(depositDate < tomorrow)
Catch
args.IsValid = False
End Try
End Sub
Private Sub cvInvalidAmount_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles cvInvalidAmount.ServerValidate
Try
Double.Parse(txtCheckAmount.Text)
Catch
args.IsValid = False
End Try
End Sub
Private Sub cvInvalidDate_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles cvInvalidDate.ServerValidate
Try
DateTime.Parse(txtCheckDate.Text)
Catch
args.IsValid = False
End Try
End Sub
Private Sub DepositEditing()
foodMaster.Deposit.Load(Me.CurrentDeposit)
foodMaster.ShowDepositWindow()
End Sub
Private Sub DepositSaved()
dihHeader.Deposit.Load(Me.CurrentDeposit)
dihHeader.Reload()
End Sub
Private Sub Payments_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
LoadControls()
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
foodMaster = DirectCast(Me.Master, Food)
AddHandler foodMaster.SaveClicked, AddressOf DepositSaved
AddHandler foodMaster.EditButtonClicked, AddressOf DepositEditing
If IsPostBack = False Then
Me.CurrentCheck = 0
SetupNewCheck()
End If
End Sub
Private Sub pcPayments_ApplyFundsClicked(ByVal CheckId As Integer) Handles pcPayments.ApplyFundsClicked
End Sub
Private Sub pcPayments_DeleteClicked(ByVal CheckId As Integer) Handles pcPayments.DeleteClicked
Try
If Me.CurrentCheck = CheckId Then Me.CurrentCheck = 0
_check = New BusinessLayer.CustomerCheck
_check.CheckId = CheckId
_check.DeleteAllPayments()
_check.Delete()
LoadControls()
Catch
End Try
End Sub
Private Sub pcPayments_EditClicked(ByVal CheckId As Integer) Handles pcPayments.EditClicked
Me.CurrentCheck = CheckId
_check = New BusinessLayer.CustomerCheck(CheckId)
txtCheckAmount.Text = _check.CheckAmount.ToString("0.00")
txtCheckDate.Text = _check.CheckDate.ToShortDateString
calCheckDate.SelectedDate = _check.CheckDate
txtCheckNumber.Text = _check.CheckNumber
modCheck.Show()
End Sub
Private Sub LoadControls()
Dim checks As New BusinessLayer.CustomerCheckCollection()
checks.LoadByDeposit(Me.CurrentDeposit)
pcPayments.Checks = checks
pcPayments.Reload()
dihHeader.Deposit.Load(Me.CurrentDeposit)
dihHeader.TotalCheckAmount = pcPayments.TotalCheckAmount
dihHeader.TotalAppliedAmount = pcPayments.TotalAmountApplied
dihHeader.Reload()
End Sub
Private Sub SetupNewCheck()
_check = Nothing
txtCheckDate.Text = Now.ToShortDateString()
calCheckDate.SelectedDate = Now
txtCheckAmount.Text = String.Empty
txtCheckNumber.Text = String.Empty
End Sub
End Class
部分公共类付款
继承BasePage
私人食品管理员
Private\u检查为BusinessLayer.CustomerCheck
私有子btnAddCheck_Click(ByVal sender作为对象,ByVal e作为System.EventArgs)处理btnAddCheck。单击
“什么也不做。模式窗口通过设计器中的模式窗口绑定到按钮
端接头
私有子btnCalendar\u单击(ByVal sender作为对象,ByVal e作为System.Web.UI.ImageClickEventArgs)处理btnCalendar。单击
calCheckDate.Visible=不是calCheckDate.Visible
modCheck.Show()
端接头
私有子btnCheckSave_Click(ByVal sender作为对象,ByVal e作为System.EventArgs)处理btnCheckSave。单击
尝试
如果没有(_check),则_check=New BusinessLayer.CustomerCheck
如果Me.CurrentCheck>0,则_check.CheckId=Me.CurrentCheck
_check.CheckNumber=txtCheckNumber.Text
_check.CheckDate=CDate(txtCheckDate.Text)
_check.CheckAmount=CDbl(txtCheckAmount.Text)
_check.DepositId=Me.CurrentDeposit
_check.Save()
LoadControls()
'在编辑后重置当前检查以避免混淆
Me.CurrentCheck=0
SetupNewCheck()
特例
lblMessage.Text=“无法保存支票。”
lblMessage.Visible=True
modCheck.Show()
结束尝试
端接头
私有子calCheckDate_SelectionChanged(ByVal sender作为对象,ByVal e作为System.EventArgs)处理calCheckDate.SelectionChanged
txtCheckDate.Text=calCheckDate.SelectedDate.ToSortDateString()
calCheckDate.Visible=False
modCheck.Show()
端接头
私有子cvFutureDate_ServerValidate(ByVal源作为对象,ByVal参数作为System.Web.UI.WebControl.ServerValidateEventArgs)处理cvFutureDate.ServerValidate
尝试
Dim depositDate As DateTime=DateTime.Parse(txtCheckDate.Text)
Dim futureDate As DateTime=Now.AddDays(1)
将明天暗显为新日期时间(futureDate.Year,futureDate.Month,futureDate.Day)
args.IsValid=CBool(存款日期<明天)
抓住
args.IsValid=False
结束尝试
端接头
私有子cvInvalidAmount_ServerValidate(ByVal源作为对象,ByVal args作为System.Web.UI.WebControls.ServerValidateEventArgs)处理cvInvalidAmount.ServerValidate
尝试
Double.Parse(txtCheckAmount.Text)
抓住
args.IsValid=False
结束尝试
端接头
私有子cvInvalidDate_ServerValidate(ByVal源作为对象,ByVal参数作为System.Web.UI.WebControl.ServerValidateEventArgs)处理cvInvalidDate.ServerValidate
尝试
Parse(txtCheckDate.Text)
抓住
args.IsValid=False
结束尝试
端接头
私人转存户
foodMaster.Deposit.Load(Me.CurrentDeposit)
foodMaster.showDepositorWindow()
端接头
私人转存户
dihHeader.存款.加载(Me.活期存款)
dihHeader.Reload()
端接头
Private Sub Payments_Init(ByVal sender作为对象,ByVal e作为System.EventArgs)处理Me.Init
LoadControls()
端接头
受保护的子页加载(ByVal sender作为对象,ByVal e作为System.EventArgs)处理Me.Load
foodMaster=DirectCast(Me.Master,食品)
AddHandler foodMaster.SaveClicked,地址已保存
AddHandler foodMaster.EditButtonClicked,存款编辑地址
如果IsPostBack=False,则
Me.CurrentCheck=0
SetupNewCheck()
如果结束
端接头
私有子pcPayments\u ApplyFundsClicked(ByVal CheckId为整数)处理pcPayments.ApplyFundsClicked
端接头
私有子pcPayments\u DeleteClicked(ByVal CheckId为整数)处理pcPayments.DeleteClicked
尝试
如果Me.CurrentCheck=CheckId,则Me.CurrentCheck=0
_检查=新建BusinessLayer.CustomerCheck
_check.CheckId=CheckId
_选中。删除所有付款()
_选中。删除()
LoadControls()
抓住
结束尝试
端接头
私有子pcPayments_EditClicked(ByVal CheckId为整数)处理pcPayments.EditClicked
Me.CurrentCheck=CheckId
_check=新的BusinessLayer.CustomerCheck(检查ID)
txtCheckAmount.Text=\u check.CheckAmount.ToString(“0.00”)
txtCheckDate.Text=\u check.CheckDate.ToSortDateString
calCheckDate.SelectedDate=\u check.CheckDate
txtCheckNumber.Text=\u check.CheckNumber
modCheck.Show()
端接头
专用子加载控件()
作为新的BusinessLayer.CustomerCheckCollection()进行Dim检查
支票。按存款(Me.活期存款)
pcPayments.Checks=支票
pcPayments.Reload()
dihHeader.存款.加载(Me.活期存款)
dihHeader.TotalCheckAmount=pcPayments.TotalCheckAmount
dihHeader.TotalAppliedAmount=pcPayments.totalamount未应用
dihHeader.Reload()
端接头
私有子设置newcheck()
_支票=无
txtCheckDate.Text=Now.ToShortDateString()
calCheckDate.SelectedDate=现在
txtCheckAmount.Text=String.Empty
txtCheckNumber.Text=String.Empty
端接头
末级
PaymentsControl.ascx
Public Partial Class PaymentsControl
Inherits System.Web.UI.UserControl
Private _checks As BusinessLayer.CustomerCheckCollection
Private _applied As Double
Public Event ApplyFundsClicked(ByVal CheckId As Integer)
Public Event DeleteClicked(ByVal CheckId As Integer)
Public Event EditClicked(ByVal CheckId As Integer)
Public Sub New()
_checks = New BusinessLayer.CustomerCheckCollection
_applied = 0
End Sub
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'If IsPostBack = False Then
' BindChecks()
'End If
End Sub
Private Sub ApplyButtonClicked(ByVal sender As Object, ByVal e As EventArgs)
RaiseEvent ApplyFundsClicked(DirectCast(sender, LinkButton).CommandArgument)
End Sub
Private Sub DeleteButtonClicked(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs)
RaiseEvent DeleteClicked(DirectCast(sender, ImageButton).CommandArgument)
End Sub
Private Sub EditButtonClicked(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs)
RaiseEvent EditClicked(DirectCast(sender, ImageButton).CommandArgument)
End Sub
Private Sub BindChecks()
tblChecks.Rows.Clear()
tblChecks.Rows.Add(BuildTableHeader())
_applied = 0
For i As Int16 = 0 To _checks.Count - 1
_checks(i).LoadAllPayments()
_applied += _checks(i).TotalAmountApplied
tblChecks.Rows.Add(BuildCheckRow(_checks(i)))
tblChecks.Rows.Add(BuildInvoiceRow(_checks(i)))
Next
If tblChecks.Rows.Count = 1 Then tblChecks.Visible = False
End Sub
Private Function BuildCheckRow(ByVal Check As BusinessLayer.CustomerCheck) As TableRow
Dim checkNumberCell As New TableCell()
Dim checkDateCell As New TableCell()
Dim checkAmountCell As New TableCell()
Dim totalAppliedCell As New TableCell()
checkNumberCell.Text = Check.CheckNumber
checkDateCell.Text = Check.CheckDate.ToShortDateString()
checkAmountCell.Text = Check.CheckAmount.ToString("C")
totalAppliedCell.Text = Check.TotalAmountApplied.ToString("C")
If Check.TotalAmountApplied <> Check.CheckAmount Then totalAppliedCell.ForeColor = Drawing.Color.Red
Dim myRow As New TableRow
myRow.Cells.Add(BuildCheckControlCell(Check.CheckId))
myRow.Cells.Add(checkNumberCell)
myRow.Cells.Add(checkDateCell)
myRow.Cells.Add(checkAmountCell)
myRow.Cells.Add(totalAppliedCell)
Return myRow
End Function
Private Function BuildCheckControlCell(ByVal CheckId As Integer) As TableCell
Dim editButton As New ImageButton()
editButton.CommandArgument = CheckId
editButton.CausesValidation = False
editButton.AlternateText = "Edit"
editButton.ImageUrl = "~/images/icons/bullet_edit.png"
AddHandler editButton.Click, AddressOf EditButtonClicked
Dim deleteButton As New ImageButton
deleteButton.CommandArgument = CheckId
deleteButton.CausesValidation = False
deleteButton.AlternateText = "Delete"
deleteButton.ImageUrl = "~/images/icons/bullet_cross.png"
deleteButton.Attributes.Add("onclick", "return confirmDelete()")
AddHandler deleteButton.Click, AddressOf DeleteButtonClicked
Dim blankSpace As New Literal()
blankSpace.Text = " "
Dim myCell As New TableCell
myCell.Controls.Add(editButton)
myCell.Controls.Add(blankSpace)
myCell.Controls.Add(deleteButton)
Return myCell
End Function
Private Function BuildInvoiceRow(ByVal Check As BusinessLayer.CustomerCheck) As TableRow
Dim invoiceDetailCell As New TableCell
invoiceDetailCell.ColumnSpan = 4
invoiceDetailCell.Controls.Add(BuildInvoiceDetailTable(Check.Payments))
Dim myRow As New TableRow
myRow.Cells.Add(BuildInvoiceControlCell(Check.CheckId))
myRow.Cells.Add(invoiceDetailCell)
Return myRow
End Function
Private Function BuildInvoiceControlCell(ByVal CheckId As Integer) As TableCell
Dim text As New Literal
text.Text = "Invoices for check:<br />"
Dim applyButton As New LinkButton
applyButton.CommandArgument = CheckId
applyButton.CausesValidation = False
applyButton.Text = "Apply Funds"
AddHandler applyButton.Click, AddressOf ApplyButtonClicked
Dim myCell As New TableCell
myCell.Controls.Add(text)
myCell.Controls.Add(applyButton)
Return myCell
End Function
Private Function BuildInvoiceDetailTable(ByVal Payments As BusinessLayer.PaymentTransactionCollection) As Table
Dim myTable As New Table
myTable.CssClass = "tableSub"
myTable.CellPadding = "0"
myTable.CellSpacing = "0"
myTable.BorderWidth = "0"
myTable.Rows.Add(BuildInvoiceDetailHeader())
For i As Integer = 0 To Payments.Count - 1
myTable.Rows.Add(BuildPaymentRow(Payments(i)))
Next
If myTable.Rows.Count = 1 Then myTable.Visible = False
Return myTable
End Function
Private Function BuildInvoiceDetailHeader() As TableRow
Dim customerCell As New TableHeaderCell
Dim invoiceCell As New TableHeaderCell
Dim dueCell As New TableHeaderCell
Dim paymentCell As New TableHeaderCell
customerCell.Text = "Customer"
invoiceCell.Text = "Invoice number"
dueCell.Text = "Amount due"
paymentCell.Text = "Payment amount"
Dim myRow As New TableRow
myRow.Cells.Add(customerCell)
myRow.Cells.Add(invoiceCell)
myRow.Cells.Add(dueCell)
myRow.Cells.Add(paymentCell)
Return myRow
End Function
Private Function BuildPaymentRow(ByVal Payment As BusinessLayer.PaymentTransaction) As TableRow
Dim customerCell As New TableCell
Dim invoiceCell As New TableCell
Dim amountDueCell As New TableCell
Dim paymentCell As New TableCell
'Payment.Customer.Load()
customerCell.Text = Payment.Customer.NumberAndName
invoiceCell.Text = Payment.Invoice.InvoiceNumber
amountDueCell.Text = Payment.Invoice.AmountDue.ToString("C")
paymentCell.Text = Payment.PaymentAmount.ToString("C")
Dim myRow As New TableRow
myRow.Cells.Add(customerCell)
myRow.Cells.Add(invoiceCell)
myRow.Cells.Add(amountDueCell)
myRow.Cells.Add(paymentCell)
Return myRow
End Function
Private Function BuildTableHeader() As TableRow
Dim blankCell As New TableHeaderCell()
Dim checkNumberCell As New TableHeaderCell()
Dim checkDateCell As New TableHeaderCell()
Dim checkAmountCell As New TableHeaderCell()
Dim totalUnappliedCell As New TableHeaderCell()
checkNumberCell.Text = "Check number"
checkDateCell.Text = "Check date"
checkAmountCell.Text = "Check amount"
totalUnappliedCell.Text = "Total unapplied"
Dim myRow As New TableRow
myRow.Cells.Add(blankCell)
myRow.Cells.Add(checkNumberCell)
myRow.Cells.Add(checkDateCell)
myRow.Cells.Add(checkAmountCell)
myRow.Cells.Add(totalUnappliedCell)
Return myRow
End Function
Public Sub Reload()
BindChecks()
End Sub
Public Property Checks() As BusinessLayer.CustomerCheckCollection
Get
Return _checks
End Get
Set(ByVal value As BusinessLayer.CustomerCheckCollection)
_checks = value
End Set
End Property
Public ReadOnly Property TotalCheckAmount() As Double
Get
Return _checks.TotalCheckAmount
End Get
End Property
Public ReadOnly Property TotalAmountApplied() As Double
Get
Return _applied
End Get
End Property
End Class
公共部分类付款控件
继承System.Web.UI.UserControl
Private\u检查为BusinessLayer.Cust