Question

当我尝试通过模拟器运行我的应用程序时，它会中断并收到此消息

“设置属性'Microsoft.Phone.Controls.ListPicker.ItemCountThreshold'引发了异常。”

任何想法？

Answer 1

问题是你不应该直接使用ListPickerItem;如果你想直接在XAML中使用字符串或任何其他类声明项目！

检查此样本：

<phone:PhoneApplicationPage 
    x:Class="PhoneApp.MainPage"
    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"
    xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <StackPanel x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <toolkit:ListPicker ExpansionMode="FullScreenOnly">
                <sys:String>Item 1</sys:String>
                <sys:String>Item 2</sys:String>
                <sys:String>Item 3</sys:String>
            </toolkit:ListPicker>
        </StackPanel>
    </Grid>
</phone:PhoneApplicationPage>

正如您在此处所见，只需不使用ListPickerItem！

另外，删除ItemCountThreshold属性;这是一个只读属性，不应在XAML中设置！

Answer 2

尝试设置ExpansionMode =“FullScreenOnly”。

设置属性'Microsoft.Phone.Controls.ListPicker.ItemCountThreshold'抛出异常？

2 个答案: