Question

我有一个奇怪的问题，当我导航回到我的Windows Phone 7应用程序中首次查看的页面时，我得到了一个异常

“{System.ArgumentException：参数不正确。}”

我似乎无法找到错误的来源 - 还有其他人经历过这个吗？

Callstack是：

   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at System.Collections.Generic.List`1.get_Item(Int32 index)
   at System.Collections.Generic.List`1.System.Collections.IList.get_Item(Int32 index)
   at System.Windows.Controls.ItemCollection.GetItemImpl(Int32 index)
   at System.Windows.Controls.ItemCollection.GetItemImplSkipMethodPack(Int32 index)
   at System.Windows.PresentationFrameworkCollection`1.get_Item(Int32 index)
   at System.Windows.Controls.VirtualizingStackPanel.CleanupContainers(ItemsControl itemsControl)
   at System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.MeasureOverrideNative(IntPtr element, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.FrameworkElement_MeasureOverride(FrameworkElement element, Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(Size availableSize)
   at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.MeasureNative(IntPtr element, Single inWidth, Single inHeight)
   at MS.Internal.XcpImports.UIElement_Measure(UIElement element, Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.MeasureOverrideNative(IntPtr element, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.FrameworkElement_MeasureOverride(FrameworkElement element, Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.MeasureOverrideNative(IntPtr element, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.FrameworkElement_MeasureOverride(FrameworkElement element, Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.MeasureOverrideNative(IntPtr element, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)
   at MS.Internal.XcpImports.FrameworkElement_MeasureOverride(FrameworkElement element, Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(Size availableSize)
   at Microsoft.Phone.Controls.PhoneApplicationFrame.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)

有趣的是，其他人也有同样的错误：

.NET: ArgumentOutOfRangeException when calling .Add on a collection (Trouble with Pivot control)

但我的错误与可观察列表无关，因为我的列表不从可观察列表类型继承...

导航到的页面的XAML也非常简单：

<phone:PhoneApplicationPage 
    x:Class="TestApp.PhoneApplication.AddItem"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="TestApplication" Style="{StaticResource PhoneTextNormalStyle}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <TextBox Height="72" HorizontalAlignment="Left" Margin="0,324,0,0" Name="txtItemName" Text="Item name" VerticalAlignment="Top" Width="450" GotFocus="txtItemName_GotFocus" LostFocus="txtItemName_LostFocus" />
            <Button Content="Save" Height="72" HorizontalAlignment="Left" Margin="0,402,0,0" Name="btnSave" VerticalAlignment="Top" Width="160" Click="btnSave_Click" />
            <Button Content="Cancel" Height="72" HorizontalAlignment="Left" Margin="290,402,0,0" Name="btnCancel" VerticalAlignment="Top" Width="160" Click="btnCancel_Click" />
        </Grid>
        <ProgressBar Height="4" Style="{StaticResource PerformanceProgressBar}"  HorizontalAlignment="Left" Margin="12,480,0,0" Name="progressBar1" VerticalAlignment="Top" Width="460" Grid.Row="1" Opacity="0" Background="#FFCF2B26" Foreground="#FFCF2B26" />
    </Grid>
</phone:PhoneApplicationPage>

Answer 1

我找到了解决方案。

用户导航是：

加载应用程序并转到main.xaml（如果在onnavigating中没有项目转到additem.xaml）
输入项目
前往main.xaml
转到详细视图并删除项目
导航回main.xaml，如果没有项目我goback AGAIN

问题是我认为框架中存在错误。我在main.xaml中的项目列表不是一个可观察的集合。这意味着在返回main.xaml之后，它一定是在尝试从上一个视图加载上下文 - 现在已经改变了，列表中没有项目，所以它崩溃了。

它似乎发生在2 NavigationContext.GoBack（）上，因为它在另一个线程上触发，只在导航开始发生后出现 - 很奇怪。

我解决了这个问题，方法是在main.xaml上以列表形式显示的集合可观察并使内部的项目遵循INotifyChanged。一旦我这样做，一切都神奇地开始工作......

感谢所有试图提供帮助的人 - 您的意见非常感谢（我的赞成表示感谢）

Answer 2

您是否有任何可能导致以下情况的代码：

protected override void  OnNavigatedTo(NavigationEventArgs e)
    {
        if(//some condition where page should go back )
        {
            if(NavigationService.CanGoBack)
                NavigationService.GoBack();
        }
    }

Answer 3

如果您在同一页面上导航，可能会发生这种情况。（如果RootFrame.OriginalSource是“Sample.xaml”而你正在做Navigate（“Samle.xaml”，UriKind.Relative））

Answer 4

好的，基于堆栈，看起来你正在使VirtualizingStackPanel访问超出界限的列表。可能是框架中的错误，但更有可能的是你正在做一些它没有预期的事情。您是否手动（以编程方式）向面板添加和删除内容？当你检测到滚动时，你在做什么吗？看看你是如何在该页面上操纵StackPanel的。

此外，根据这些新信息以及异常消息的内容，他们建议您进行双导航似乎是错误的。我原本认为当我看到你的标题时就是问题，所以我明白它们来自哪里，但在这种情况下的例外是“片段不受支持”。这显然不是这种情况。

导航时参数无效异常

4 个答案: