阵列不保留更新时的值

Question

我可以将值添加到array(0)，但是当我然后将值添加到array(1)它将清除值array(0)。我尝试了所有我能想到的方式来声明和创建数组。我的代码如下所示：

Dim aryEstimateInfo() As String = New String(7) {} 

Private Sub wzrdEstimateWizard_NextButtonClick(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.WizardNavigationEventArgs) Handles wzrdEstimateWizard.NextButtonClick 

    Select Case wzrdEstimateWizard.ActiveStepIndex 
     Case 0 'first estimate wizard step 
      aryEstimateInfo(0) = rad_lstVehicleType.SelectedItem.ToString 

     Case 1 'second estimate wizard step 
      Dim DamageZoneSelected As Boolean = False 
      For Each cntrl As Control In pnlDamageZone.Controls 
       If TypeOf cntrl Is RadioButton Then 
        Dim RadButton As RadioButton = cntrl 
        If RadButton.Checked Then 
         DamageZoneSelected = True 
         DamageZone = RadButton.Text.ToString 
         Exit For 
        Else 
         DamageZoneSelected = False 
        End If 
       End If 
      Next 
      If DamageZoneSelected = True Then 
       lblDamageZoneError.Visible = False 
       aryEstimateInfo(1) = DamageZone 
      Else 
       'if no damage zone is selected a message is displayed 
       wzrdEstimateWizard.ActiveStepIndex = 2 
       wzrdEstimateWizard.ActiveStepIndex = 1 
       lblDamageZoneError.Visible = True 
      End If 

     Case 2 'third estimate wizard step 
      'assigns the number of dents to the estimate array 
      aryEstimateInfo(2) = ddlNumberOfDents.SelectedValue.ToString 
      'sets the average dent size in the estimate arrau 
      aryEstimateInfo(3) = ddlDentSize.SelectedValue.ToString 
      'sets the add-on code and number of oversized dents 
      If ddlOverSized.Enabled = True Then 
       'aryEstimateInfo.SetValue("3", 4) 
       aryEstimateInfo(4) = "3" 
       aryEstimateInfo(7) = ddlOverSized.SelectedValue.ToString 
      Else 
      End If 
     Case 3 'fourth estimate wizard step 
     Case Else 
    End Select 

End Sub 

在声明中的代码的新数组someehere您不能重复我在ASP.Net向导控制和基础，Visual Studio 2010中

Answer 1

的问题是，每个按钮的点击被回发页面，这会导致您的aryEstimateInfo在每次回发中重新创建。

为了很好地处理这种情况下，提高了网页的维护，并使其更容易调试这种情况在未来，我建议以下变化：

1）阵列更改为与属性的类：所有的属性都声明为字符串

Public Class EstimateInfo 
    Public VehicleType As String = "" 
    Public DamageZone As String = "" 
    Public NumberOfDents As String = "" 
    Public DentSize As String = "" 
    Public AddOnCode As String = "" 
    Public Oversized As String = "" 
End Class 

注意，但数据类型也许应该改为以更准确地反映基础内容。

这种做法将有助于调试，因为您可以在自动实现的属性更改为一个getter/setter方法，这样就可以放置一个断点，看看那里的价值是越来越清：

Private m_sVehicleType As String = "" 
Public Property VehicleType As String 
    Get 
     Return m_sVehicleType 
    End Get 
    Set (Value As String 
     ' You could set a breakpoint here to discover where the value is getting cleared. 
     m_sVehicleType = Value 
    End Set 
End Property 

，如果您需要将字符串数组中的值导出到不同的应用程序或数据库中，例如，可以向类中添加一个方法来生成适当的字符串数组。

2）向页面添加一个属性，将当前答案类存储在页面的ViewState中，这样就不必连续重新填充数组。例如：

Private Property EstimateInfo As EstimateInfo 
    Get 
     ' Add a new record to the viewstate if it doesn't already exist 
     If ViewState("EstimateInfo") Is Nothing Then 
      Me.EstimateInfo = New EstimateInfo 
     End If 
     Return ViewState("EstimateInfo") 
    End Get 
    Set (value As EstimateInfo) 
     ViewState("EstimateInfo") = value 
    End Set 
End Property 

一旦你这样做，你的向导代码变得更容易理解和维护：

Select Case wzrdEstimateWizard.ActiveStepIndex 
    Case 0 'first estimate wizard step 
     Me.EstimateInfo.VehicleType = rad_lstVehicleType.SelectedItem.ToString 

Answer 2

使用此它后又回来了。

我建议的基础上完成向导事件数组 可以使用全部步骤，其中曾经步骤你

我猜控件会被罚款

否则，你需要将阵列存储后在会话或视图状态的每次更新，但我不喜欢这两个

对不起becoz我用手机我不能查看例如