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我已经定义了这样一个ListView:UWP的ListView没有数据
<ListView x:Name="phonesListView"
Grid.Row="5"
Background="Black"
IsItemClickEnabled="True"
Foreground="Gray" >
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<Grid>
<Border x:Name="myback" Background="Transparent">
<ContentPresenter Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" Margin="20, 0, 20, 0"/>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Grid Width="auto" HorizontalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid
Grid.Row="0">
<Grid.ColumnDefinitions >
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ComboBox
Grid.Column="0"
VerticalAlignment="Center"
Background="Black"
Foreground="White" >
<ComboBoxItem Content="Home" IsSelected="True"/>
<ComboBoxItem Content="Work"/>
<ComboBoxItem Content="Office"/>
<ComboBoxItem Content="Fax"/>
<ComboBoxItem Content="School"/>
</ComboBox>
<Button
Grid.Column="1"
Height="30"
Width="30"
Foreground="Black"
Margin="0, 5, 0, 5"
HorizontalAlignment="Center" Click="RemovePhone">
<Button.Background>
<ImageBrush Stretch="Fill" ImageSource="Assets/appbar.close.png" />
</Button.Background>
</Button>
</Grid>
<TextBox
Grid.Row="1"
Background="White"
Foreground="Black"
FontSize="18"
Text="{Binding Number}"
InputScope="TelephoneNumber" />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
在代码中,我的属性:
ObservableCollection<Phone> phones = new ObservableCollection<Phone>();
一切工作正常,我可以添加并可以删除列表视图中的项目
phones.Add or phones.Remove
问题是当我离开页面或保存按钮被按下这个集合的计数正好是它是但我没有填写输入字段中的数据。你能帮我解决吗?谢谢。