Silverlight 子窗口在第二次运行时挂起 webapp答案

【问题标题】：Silverlight Child Window hangs the webapp at second runSilverlight 子窗口在第二次运行时挂起 webapp
【发布时间】：2011-02-10 06:45:04
【问题描述】：

以下是我用来调用子窗口的代码：

Dim c As New New_Contact()
                c.Title = "New Contact Details"
                AddHandler c.Closed, AddressOf NewContactClosed
                c.Show()

以下是子窗口的 XAML：

<controls:ChildWindow xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"  x:Class="AtomHelpers.New_Contact"
       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
       xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
       Width="662" Height="363"
       Title="Add New Contact" FontSize="14">
<Grid x:Name="LayoutRoot" Margin="2" Height="320">
    <Grid Margin="0,0,0,0">
        <sdk:Label Content="Name" Height="18" HorizontalAlignment="Left" Margin="6,12,0,0" Name="Label1" VerticalAlignment="Top" Width="120" FontSize="14"/>
        <sdk:Label Content="Type" Height="18" HorizontalAlignment="Left" Margin="6,43,0,0" Name="Label6" VerticalAlignment="Top" Width="120" FontSize="14" />
        <sdk:Label Content="Reference" Height="18" HorizontalAlignment="Left" Margin="6,128,0,0" Name="Label7" VerticalAlignment="Top" Width="76" FontSize="14" />
        <sdk:Label Content="Department" Height="18" HorizontalAlignment="Left" Margin="6,160,0,0" Name="Label8" VerticalAlignment="Top" Width="97" FontSize="14"/>
        <sdk:Label Content="Office" Height="18" HorizontalAlignment="Left" Margin="6,190,0,0" Name="Label9" VerticalAlignment="Top" Width="120" FontSize="14" />
        <sdk:Label Content="Profession" Height="18" HorizontalAlignment="Left" Margin="6,215,0,0" Name="Label10" VerticalAlignment="Top" Width="120" FontSize="14" />
        <sdk:Label Content="Birthdate" Height="18" HorizontalAlignment="Left" Margin="6,248,0,0" Name="Label11" VerticalAlignment="Top" Width="120" FontSize="14" />
        <sdk:Label Content="Primary Address" Height="18" HorizontalAlignment="Left" Margin="302,11,0,0" Name="Label12" VerticalAlignment="Top" Width="133" FontSize="14" />
        <sdk:Label Content="Primary Numbers" Height="18" HorizontalAlignment="Left" Margin="302,131,0,0" Name="Label13" VerticalAlignment="Top" Width="133" FontSize="14" />
        <sdk:Label Content="Allow Group" Height="18" HorizontalAlignment="Left" Margin="305,248,0,0" Name="Label14" VerticalAlignment="Top" Width="120" FontSize="14" />
        <TextBox Height="23" HorizontalAlignment="Left" Margin="95,8,0,0" Name="Namee" VerticalAlignment="Top" Width="163" MaxLength="10" IsReadOnly="True" />
        <TextBox Height="23" HorizontalAlignment="Left" Margin="95,156,0,0" Name="Department" VerticalAlignment="Top" Width="192" TabIndex="4" />
        <TextBox Height="23" HorizontalAlignment="Left" Margin="95,186,0,0" Name="Office" VerticalAlignment="Top" Width="192" TabIndex="5" />
        <TextBox Height="23" HorizontalAlignment="Left" Margin="95,215,0,0" Name="Profession" VerticalAlignment="Top" Width="192" TabIndex="6" />
        <sdk:DatePicker Height="23" HorizontalAlignment="Left" Margin="95,244,0,0" Name="DatePicker1" VerticalAlignment="Top" Width="192" TabIndex="7" />
        <TextBlock Height="114" HorizontalAlignment="Left" Margin="432,12,0,0" Name="AddressTextBlock" Text="" VerticalAlignment="Top" Width="172" TextWrapping="Wrap" />
        <TextBlock Height="114" HorizontalAlignment="Left" Margin="432,131,0,0" Name="NumberTextBlock" Text="" VerticalAlignment="Top" Width="172" TextWrapping="Wrap" />
        <CheckBox  Height="16" HorizontalAlignment="Left" Margin="405,244,0,0" Name="GroupCheckBox" VerticalAlignment="Top" TabIndex="10" />
        <Button Content="E" Height="23" HorizontalAlignment="Left" Margin="264,7,0,0" Name="NameButton1" VerticalAlignment="Top" Width="23" TabIndex="0" />
        <ScrollViewer Height="69" HorizontalAlignment="Left" Margin="95,43,0,0" VerticalAlignment="Top" Width="163" TabIndex="1">
            <StackPanel HorizontalAlignment="Left" Name="stackPanel1" VerticalAlignment="Top" />
        </ScrollViewer>
        <Button Content="E" Height="23" HorizontalAlignment="Left" Margin="264,39,0,0" Name="Typebutton2" VerticalAlignment="Top" Width="23" TabIndex="2" />
        <Button Content="E" Height="23" HorizontalAlignment="Left" Margin="608,11,0,0" Name="AddressButton" VerticalAlignment="Top" Width="23" TabIndex="8" />
        <Button Content="E" Height="23" HorizontalAlignment="Left" Margin="608,127,0,0" Name="NumberButton" VerticalAlignment="Top" Width="23" TabIndex="9" />
        <CheckBox Height="16" HorizontalAlignment="Left" Margin="93,130,0,0" Name="ReferenceCheckBox" VerticalAlignment="Top" Content="Yes" TabIndex="3" FontSize="14"/>
        <ComboBox Height="23" HorizontalAlignment="Left" Margin="141,126,0,0" Name="ComboBox1" VerticalAlignment="Top" Width="143" IsEnabled="False" TabIndex="3">
            <ComboBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal" Margin="2,0,0,0">
                        <TextBlock Text="{Binding Namee}" Tag="{Binding Key}"/>
                    </StackPanel>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>
        <Button x:Name="SaveOKButton" Content="Save" Width="75" Height="23" HorizontalAlignment="Left" Margin="226,288,0,0" TabIndex="11" VerticalAlignment="Top" />
        <Button x:Name="CancelButton" Content="Cancel" Width="75" Height="23" HorizontalAlignment="Left" Margin="319,288,0,0" TabIndex="12" VerticalAlignment="Top" />
    </Grid>
</Grid>

以下是子窗口的后端代码：

Partial Public Class New_Contact
Inherits ChildWindow
Dim contactObj As ContactObjs.Contact
Dim org As ContactObjs.Contact
Structure ComboItem
    Private id As String
    Private display As String
    Property Key
        Get
            Return id
        End Get
        Set(ByVal value)
            id = value
        End Set
    End Property
    Property Namee
        Get
            Return display
        End Get
        Set(ByVal value)
            display = value
        End Set
    End Property
End Structure

Public Sub New()
    InitializeComponent()
    contactObj = New ContactObjs.Contact
    Dim serv As New WCFContactService.ContactsClient
    AddHandler serv.GetTypesListCompleted, AddressOf TypeslistReceived
    AddHandler serv.GetGroupingContactsCompleted, AddressOf ReferenceReceived
    serv.GetTypesListAsync(App.Current.Resources("ClientID"), "Contacts Type")
    serv.GetGroupingContactsAsync(App.Current.Resources("ClientID"))
End Sub

Public Sub New(ByVal contactID As String)
    InitializeComponent()
    'contactObj = New ContactObjs.Contact(contactID)
    Dim serv As New WCFContactService.ContactsClient
    AddHandler serv.GetTypesListCompleted, AddressOf TypeslistReceived
    AddHandler serv.GetFullContactCompleted, AddressOf ContactReceived
    AddHandler serv.GetGroupingContactsCompleted, AddressOf ReferenceReceived
    serv.GetTypesListAsync(App.Current.Resources("ClientID"), "Contacts Type")
    serv.GetGroupingContactsAsync(App.Current.Resources("ClientID"))
    serv.GetFullContactAsync(contactID)
    SaveOKButton.Content = "Update"
End Sub

Private Sub ReferenceReceived(ByVal sender As Object, ByVal e As WCFContactService.GetGroupingContactsCompletedEventArgs)
    'Throw New NotImplementedException
    ComboBox1.Items.Clear()
    Dim result As New List(Of ComboItem)
    For Each k As KeyValuePair(Of String, String) In e.Result
        Dim c As New ComboItem
        c.Key = k.Key
        c.Namee = k.Value.ToString()
        result.Add(c)
    Next
    ComboBox1.ItemsSource = result
End Sub

Private Sub AssignValues()
    Namee.Text = contactObj.Inf.Namee.ToString()

    'Reference
    If contactObj.Inf.Referenece = "" Then
        ReferenceCheckBox.IsChecked = False
    Else
        ReferenceCheckBox.IsChecked = True
        For i = 0 To ComboBox1.Items.Count - 1
            Dim c As ComboItem
            c = ComboBox1.Items(i)
            If c.Key = contactObj.Inf.Referenece Then
                ComboBox1.SelectedIndex = i
            End If
        Next
        'ComboBox1.SelectedValue = contactObj.Inf.Referenece
    End If

    Department.Text = contactObj.Inf.Department
    Office.Text = contactObj.Inf.Office
    Profession.Text = contactObj.Inf.Profession
    Try
        DatePicker1.SelectedDate = contactObj.Inf.Birthdate
    Catch ex As Exception
        DatePicker1.SelectedDate = Nothing
    End Try
    GroupCheckBox.IsChecked = contactObj.Inf.Group
    If Not contactObj.Inf.PrimaryAddressKey = "" Then
        AddressTextBlock.Text = contactObj.Inf.Addresses(contactObj.Inf.PrimaryAddressKey).ToString()
    End If
    If Not contactObj.Inf.PrimaryNumberKey = "" Then
        NumberTextBlock.Text = contactObj.Inf.Numbers(contactObj.Inf.PrimaryNumberKey).ToString()
    End If

    'Types
    If Not contactObj.Inf.ContactType = "" Then
        Dim l As New List(Of String)
        Dim t As String = ""
        For Each k As Char In contactObj.Inf.ContactType
            If k = "," Then
                l.Add(t)
                t = ""
            Else
                t = t + k.ToString()
            End If
        Next

        Dim tc As New List(Of CheckBox)
        For Each c As CheckBox In stackPanel1.Children
            If l.Contains(c.Content.ToString()) Then
                c.IsChecked = True
            End If
            tc.Add(c)
        Next
        stackPanel1.Children.Clear()
        For Each k As CheckBox In tc
            stackPanel1.Children.Add(k)
        Next
    End If
End Sub

Private Sub CancelButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs) Handles CancelButton.Click
    Me.DialogResult = False
    Me.Close()
End Sub

Private Sub NameButton1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles NameButton1.Click
    Dim c As New FullName()
    If Not contactObj.Inf.Namee.ToString() = "" Then
        c = New FullName(contactObj.Inf.Namee)
    End If
    AddHandler c.Closed, AddressOf FullNameFormClosed
    c.Show()
End Sub

Private Sub FullNameFormClosed(ByVal sender As Object, ByVal e As EventArgs)
    'Throw New NotImplementedException
    Dim k As New FullName
    k = sender
    With contactObj.Inf.Namee
        .Title = k.namee.Title
        .FirstName = k.namee.FirstName
        .MiddleName = k.namee.MiddleName
        .LastName = k.namee.LastName
        .Suffic = k.namee.Suffic
        Namee.Text = contactObj.Inf.Namee.ToString()
    End With

End Sub

Private Sub Typebutton2_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Typebutton2.Click
    Dim c As New Types()
    AddHandler c.Closed, AddressOf TypesFormClosed
    c.Show()
End Sub

Private Sub TypesFormClosed(ByVal sender As Object, ByVal e As EventArgs)
    'Throw New NotImplementedException
    Dim c As Types = sender
    If c.DialogResult = True Then
        Dim t As New CheckBox
        t.Content = c.TextBox1.Text
        t.IsChecked = True
        stackPanel1.Children.Add(t)
    End If
End Sub

Private Sub TypeslistReceived(ByVal sender As Object, ByVal e As WCFContactService.GetTypesListCompletedEventArgs)
    'Throw New NotImplementedException
    stackPanel1.Children.Clear()
    If Not e.Result.Count = 0 Then
        For Each k As String In e.Result
            Dim c As New CheckBox
            c.Content = k
            c.IsChecked = False
            stackPanel1.Children.Add(c)
        Next
    End If
End Sub

Private Sub AddressButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles AddressButton.Click
    If contactObj.Inf.Addresses.Count = 0 Then
        Dim c As New Addresses(contactObj.Inf.ID)
        AddHandler c.Closed, AddressOf AddressFormClosed
        c.Show()
    Else
        Dim c As New Addresses(contactObj.Inf.ID, contactObj.Inf.Addresses)
        AddHandler c.Closed, AddressOf AddressFormClosed
        c.Show()
    End If
End Sub

Private Sub AddressFormClosed(ByVal sender As Object, ByVal e As EventArgs)
    'Throw New NotImplementedException
    AddressTextBlock.Text = ""
    Dim c As New Addresses("")
    c = sender
    If c.DialogResult = True Then
        contactObj.Inf.Addresses = c.addr
        For Each t As ContactObjs.Address In contactObj.Inf.Addresses.Values
            If t.PrimaryAddress = True Then
                AddressTextBlock.Text = t.ToString()
                contactObj.Inf.PrimaryAddressKey = t.AddressID
            End If
        Next
    End If
End Sub

Private Sub NumberButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles NumberButton.Click
    If contactObj.Inf.Numbers.Count = 0 Then
        Dim c As New Numbers(contactObj.Inf.ID)
        AddHandler c.Closed, AddressOf NumbersFormClosed
        c.Show()
    Else
        Dim c As New Numbers(contactObj.Inf.ID, contactObj.Inf.Numbers)
        AddHandler c.Closed, AddressOf NumbersFormClosed
        c.Show()
    End If
End Sub

Private Sub NumbersFormClosed(ByVal sender As Object, ByVal e As EventArgs)
    'Throw New NotImplementedException
    NumberTextBlock.Text = ""
    Dim c As New Numbers("")
    c = sender
    If c.DialogResult = True Then
        contactObj.Inf.Numbers = c.num
        For Each t As ContactObjs.Number In contactObj.Inf.Numbers.Values
            If t.PrimaryNumber = True Then
                NumberTextBlock.Text = t.ToString()
                contactObj.Inf.PrimaryNumberKey = t.NumberID
            End If
        Next
    End If
End Sub

Private Sub ReferenceCheckBox_Checked(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles ReferenceCheckBox.Checked
    If ReferenceCheckBox.IsChecked = True Then
        ComboBox1.IsEnabled = True
    Else
        ComboBox1.IsEnabled = False
    End If
End Sub

Private Sub SaveOKButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles SaveOKButton.Click
    Select Case SaveOKButton.Content
        Case "Save" 'Contact
            contactObj.Inf.ContactType = ""
            For Each k As CheckBox In stackPanel1.Children
                If k.IsChecked = True Then
                    contactObj.Inf.ContactType = contactObj.Inf.ContactType + "," + k.Content + ","
                End If
            Next
            If ReferenceCheckBox.IsChecked = True Then
                Try
                    Dim c As New ComboItem
                    c = ComboBox1.SelectedItem
                    contactObj.Inf.Referenece = c.Key
                Catch ex As Exception
                End Try
            Else
                contactObj.Inf.Referenece = ""
            End If
            'dept, offi, profe
            With contactObj.Inf
                .Department = Department.Text
                .Office = Office.Text
                .Profession = Profession.Text
                If IsNothing(DatePicker1.SelectedDate) = False Then
                    .Birthdate = DatePicker1.SelectedDate
                End If
                .Group = GroupCheckBox.IsChecked
            End With
            contactObj.Save()
            DialogResult = True
        Case "Update"
            contactObj.Inf.ContactType = ""
            For Each k As CheckBox In stackPanel1.Children
                If k.IsChecked = True Then
                    contactObj.Inf.ContactType = contactObj.Inf.ContactType + "," + k.Content + ","
                End If
            Next
            If ReferenceCheckBox.IsChecked = True Then
                Try
                    Dim c As New ComboItem
                    c = ComboBox1.SelectedItem
                    contactObj.Inf.Referenece = c.Key
                Catch ex As Exception
                End Try
            Else
                contactObj.Inf.Referenece = ""
            End If
            'dept, offi, profe
            With contactObj.Inf
                .Department = Department.Text
                .Office = Office.Text
                .Profession = Profession.Text
                If IsNothing(DatePicker1.SelectedDate) = False Then
                    .Birthdate = DatePicker1.SelectedDate
                Else
                    .Birthdate = Nothing
                End If
                .Group = GroupCheckBox.IsChecked
            End With
            contactObj.Update(org)
            DialogResult = True
    End Select
    Me.Close()
End Sub

Private Sub ChildWindow_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.KeyEventArgs) Handles MyBase.KeyUp
    If e.Key = Key.Enter Then
        SaveOKButton_Click(Nothing, Nothing)
    End If
End Sub

Private Sub ContactReceived(ByVal sender As Object, ByVal e As WCFContactService.GetFullContactCompletedEventArgs)
    'Throw(New NotImplementedException)
    If IsNothing(e.Error) Then
        contactObj = New ContactObjs.Contact(e.Result)
        AssignValues()
        org = New ContactObjs.Contact(e.Result)
    Else
        MessageBox.Show("Error Retreving data, please try again.", "Error", MessageBoxButton.OK)
    End If
End Sub

结束类

子窗口第一次和第二次运行完美，但在第二次关闭后，应用程序停止而没有任何错误。你能告诉我哪里出错了，我好几天都被困在这里了。

我真的需要感谢@xscape 为我提供了解决问题的方法，它现在就像一个魅力。但是，我想更新源代码，以便我可以知道我之前犯了什么错误导致它被禁用。文件位于：enter link description here

另外，我很高兴我在几小时内就得到了解决方案。与其他人相比，这算不了什么。

【问题讨论】：

标签： vb.net silverlight freeze childwindow

【解决方案1】：

一个似乎可行的临时解决方案是将此代码添加到您的子窗口类中。

Private Sub Window_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Closed

   Application.Current.RootVisual.SetValue(Control.IsEnabledProperty, True)

结束子

【讨论】：

【解决方案2】：

对于那些 google 并遇到这个问题的新人，silverlight 5 似乎已经修复了这个错误，所以如果可以的话，更新到最新版本。

【讨论】：