Question

我问了一个问题，因为当我尝试使用我的跳转列表时，我的应用程序崩溃了。列表填写正确，但当我尝试跳转时我有

e.ExceptionObject {System.ArgumentException: The provided item doesn't exist in the collection.
   at Microsoft.Phone.Controls.LongListSelector.ScrollTo(Object item, Nullable1 isGroup, Boolean containerViewport, Boolean setUiaFocus)
   at Microsoft.Phone.Controls.LongListSelector.OnJumpListClosing(Object item)
   at Microsoft.Phone.Controls.JumpListController.BeginHide(Object selectedItem)
   at Microsoft.Phone.Controls.JumpListController.OnSelectionChanged(Object sender, SelectionChangedEventArgs e)
   at Microsoft.Phone.Controls.LongListSelector.set_SelectedItem(Object value)
   at Microsoft.Phone.Controls.LongListSelector.OnItemTap(Object sender, GestureEventArgs e)
   at MS.Internal.CoreInvokeHandler.InvokeEventHandler(Int32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName)} System.Exception {System.ArgumentException}

编辑：一些XAML

<phone:LongListSelector Name="ListCategorie" Margin="13,-30,0,0" ItemsSource="{Binding GroupedInformation}" ItemTemplate="{StaticResource orderByCategorieItemTemplate}" GroupHeaderTemplate="{StaticResource orderByCategorieGroupHeader}" JumpListStyle="{StaticResource orderByCategorieJumpListStyle}" IsGroupingEnabled="True" LayoutMode="List" GridCellSize="480,62" SelectionChanged="ListCategorie_SelectionChanged" />

和jumpListStyle

  <Style x:Key="orderByCategorieJumpListStyle" 
           TargetType="phone:LongListSelector">
        <Setter Property="LayoutMode"
                Value="List" />
        <Setter Property="Margin"
                Value="12,12,0,0"/>
        <Setter Property="ItemTemplate">
            <Setter.Value>
                <DataTemplate>
                    <Border Background="{Binding Key,Converter={StaticResource FormatConverter}}" 
                            Width="470" 
                            Height="70" 
                            Margin="6">
                        <TextBlock Text="{Binding Key}"
                                   Foreground="{Binding Converter={StaticResource ForegroundConverter}}"                                       
                                   FontFamily="{StaticResource PhoneFontFamilySemiLight}"
                                   FontSize="28"  
                                   Padding="2"
                                   VerticalAlignment="Bottom"/>
                    </Border>
                </DataTemplate>
            </Setter.Value>
        </Setter>
    </Style>

并创建列表

   public List<KeyedList<string, Information>> GroupedInformation
    {
        get
        {
            var infs= Information.loadXml();
            infs= Information.orderByCategorie(infs);
            var GroupedInformation=
                from inf in infs
                group inf by inf.categorie into infByCat
                select new KeyedList<string, Information>(infByCat);

            return new List<KeyedList<string, Information>>(infs);
        }
    }

Answer 1

我找到了解决方案，我有一个函数在大小改变时刷新列表，所以当我转到jumpListSelection时，应用程序刷新列表，这就是它找到项目的原因很抱歉给您带来不便

ScrollTo上的JumpList崩溃

1 个答案: