Question

When implementing a ListPicker, it will crash when there are enough items to make it full screen. It does not crash if there are only 2-3 items and it just expands. I get an ArgumentException, ‘The parameter is incorrect’

<toolkit:ListPicker Grid.Row="1" 
                    ItemTemplate="{Binding lpkItemTemplate}" 
                    FullModeItemTemplate="{Binding lpkFullItemTemplate}">
    <toolkit:ListPicker.Items>
        <toolkit:ListPickerItem>1</toolkit:ListPickerItem>
        <toolkit:ListPickerItem>5</toolkit:ListPickerItem>
        <toolkit:ListPickerItem>10</toolkit:ListPickerItem>
        <toolkit:ListPickerItem>15</toolkit:ListPickerItem>
        <toolkit:ListPickerItem>20</toolkit:ListPickerItem>
        <toolkit:ListPickerItem>30</toolkit:ListPickerItem>            
    </toolkit:ListPicker.Items>
</toolkit:ListPicker>

Templates are

<phone:PhoneApplicationPage.Resources>

    <DataTemplate x:Name="lpkItemTemplate">

        <TextBlock Text="{Binding Content}" />

    </DataTemplate>

    <DataTemplate x:Name="lpkFullItemTemplate">

        <TextBlock Text="{Binding Content}" />

    </DataTemplate>

</phone:PhoneApplicationPage.Resources>

I’ve looked at examples and I havent seen anything different than what I have here and it works. The only difference is the examplesa re doing data binding. I’ve tried steping through the control’s code but I don’t see anything that pops. It throws the exception in the base class ‘ItemsControl’ after the ‘OnManipulationCompleted’ event handler has completed in the ListPicker.

Any ideas what i’m doing wrong?

Answer 1

FullMode only works with DataBinding, and not with static ListPickerItems.