列表选择器无法转到Windows的全屏模式

Question

我试图让列表选择下拉到全屏模式。当我进入扩展模式，只有全屏，它将崩溃与第一次机会期望。下面是我的代码：

C#：

monthCat.SetValue(Microsoft.Phone.Controls.ListPicker.ItemCountThresholdProperty,12);

XAML：

<toolkit:ListPicker Name="monthCat" ExpansionMode="FullScreenOnly">
    <toolkit:ListPickerItem Content="January" />
    <toolkit:ListPickerItem Content="February" />
    <toolkit:ListPickerItem Content="March" />
    <toolkit:ListPickerItem Content="April" />
    <toolkit:ListPickerItem Content="May" />
    <toolkit:ListPickerItem Content="June" />
    <toolkit:ListPickerItem Content="July" />
    <toolkit:ListPickerItem Content="August" />
    <toolkit:ListPickerItem Content="September" />
    <toolkit:ListPickerItem Content="October" />
    <toolkit:ListPickerItem Content="November" />
    <toolkit:ListPickerItem Content="December" />
</toolkit:ListPicker>

当我删除ExpensionMode时，它可以正常工作，但它并不处于完全屏幕模式。

Answer 1

试试这个：

 public MainPage()
        {
            InitializeComponent();

            SetBinding();

        }

        void SetBinding()
        {
            List<string> list = new List<string>();
            list.Add("January");
            list.Add("February");
            list.Add("March");
            list.Add("April");
            list.Add("May");
            list.Add("June");
            list.Add("July");
            list.Add("August");
            list.Add("September");
            list.Add("October");
            list.Add("November");
            list.Add("December");
            monthCat.ItemsSource = list;
        }

并将此代码粘贴到.xaml文件中。

 <toolkit:ListPicker Name="monthCat" ExpansionMode="FullScreenOnly" >
                <toolkit:ListPicker.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}"/>
                    </DataTemplate>
                </toolkit:ListPicker.ItemTemplate>
                <toolkit:ListPicker.FullModeItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}" FontSize="25"/>
                    </DataTemplate>
                </toolkit:ListPicker.FullModeItemTemplate>
            </toolkit:ListPicker>