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如果我正在为列表框设计样式,有时候我会在每个元素之间有一个分隔符。但我不希望那个分频器在最后的元素下面。带有特殊最终ListBoxItem的样式化列表框(Silverlight 5/WPF)
是否有某种形式的转换器挂羊头卖狗肉的,我可以用得到吗? (Silverlight的5)
回答得益于后下:
XAML:
<UserControl
x:Class="SilverlightApplication41.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:SilverlightApplication41"
Width="640" Height="480">
<UserControl.Resources>
<local:NotLastItemToVisibilityConverter x:Key="NotLastItemToVisibilityConverter"/>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Border Background="#EEEDED" HorizontalAlignment="Left" VerticalAlignment="Center">
<ListBox x:Name="_listbox" Background="#FFEEEDED" BorderBrush="#FF585858">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Margin="2">
<TextBlock Text="{Binding}"/>
<Rectangle Fill="Orange" Height="2" VerticalAlignment="Bottom" Margin="1,0,1,-2"
Visibility="{Binding Converter={StaticResource NotLastItemToVisibilityConverter}}"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Border>
</Grid>
</UserControl>
CS:
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Data;
using System.Collections.Generic;
namespace SilverlightApplication41
{
public partial class MainPage : UserControl
{
public MainPage()
{
// Required to initialize variables
InitializeComponent();
List<string> dataList = new List<string>(){"Ants", "Bats", "Cats", "Dogs", "Entoloma sinuatum"};
((NotLastItemToVisibilityConverter)Resources["NotLastItemToVisibilityConverter"]).DataList = dataList;
_listbox.ItemsSource = dataList;
}
}
public class NotLastItemToVisibilityConverter : IValueConverter
{
public List<string> DataList {get; set;}
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if(DataList.Count == 0 || (string)value == DataList[DataList.Count-1])
{
return Visibility.Collapsed;
}
return Visibility.Visible;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
#endregion
}
}
注:比较需要是一个对象比较列表中的唯一字符串。否则,列表A,B,A在B之后将只有一个分隔符,因为“A”==“A”。所以这是一个使用字符串的不好的例子,但表明了一点。我试着将DataList [DataList.Count-1]转换为对象,但它似乎并没有使用传入的确切字符串。
辉煌,谢谢。我会编写代码并将其放在原始帖子中。 – shane 2012-01-27 21:21:49