Listpicker无法进入全屏模式Windows Phone

Question

我想让listpicker下拉菜单转到全屏模式。当我将扩展模式输入到全屏时，只有第一次机会才会崩溃。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> 

当我删除了ExpensionMode，它工作正常，但它是不是在fullscreenmode。

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; 
     } 

，并在您的.xaml文件中粘贴此代码。

<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>