我正在从xml文件加载列表框的值。我的问题是我无法获得绑定显示每个项目分配的类的属性值。当我以这种方式设置文本时:
<TextBlock Text="{Binding }" Style="{StaticResource TitleBlock}"></TextBlock>
这些项显示了类的toString值,但是如果我使用:
<TextBlock Text="{Binding Title}" Style="{StaticResource TitleBlock}"></TextBlock>
我为列表框中的每个项目获取空白。我希望我已经很好地解释了我的问题。代码发布如下:
MapList.xml
<Maps>
<map>
<title>Backlot</title>
<id>mp_backlot</id>
<description>Daytime urban combat.</description>
<thumbnail>mapImages/map11.jpg</thumbnail>
</map>
<map>
<title>Bloc</title>
<id>mp_bloc</id>
<description>Snowy close quarters combat with some sniping available.</description>
<thumbnail>mapImages/map11.jpg</thumbnail>
</map>
<map>
<title>The Bog</title>
<id>mp_bog</id>
<description>Night time map great for any play style.</description>
<thumbnail>mapImages/map11.jpg</thumbnail>
</map>
</Maps>
MainPage.xaml:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls" x:Class="Cod4ServerTool.MainPage" Height="521" Width="928">
<Grid x:Name="LayoutRoot">
<Grid.RowDefinitions>
<RowDefinition Height="0"/>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.Background>
<ImageBrush Stretch="Uniform" ImageSource="ui_bg.jpg"/>
</Grid.Background>
<controls:TabControl Margin="0,8,0,0" Grid.Row="1">
<controls:TabControl.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="#662A2C12" Offset="1"/>
</LinearGradientBrush>
</controls:TabControl.Background>
<controls:TabItem Header="TabItem" Foreground="Black">
<Grid>
<ListBox x:Name="MapsList_lb" Margin="8,8,177,8">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Image Source="{Binding ThumbNail}" Style="{StaticResource ThumbNailPreview}"></Image>
<TextBlock Text="{Binding Title}" Style="{StaticResource TitleBlock}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#66F0F2F0" Offset="0.254"/>
<GradientStop Color="#CC828C82" Offset="1"/>
<GradientStop Color="#CCD5DED6"/>
</LinearGradientBrush>
</ListBox.Background>
</ListBox>
<ListBox Margin="0,8,8,8" HorizontalAlignment="Right" Width="160">
<ListBox.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#66F0F2F0" Offset="0.254"/>
<GradientStop Color="#CC828C82" Offset="1"/>
<GradientStop Color="#CCD5DED6"/>
</LinearGradientBrush>
</ListBox.Background>
</ListBox>
</Grid>
</controls:TabItem>
<controls:TabItem Header="TabItem">
<Grid/>
</controls:TabItem>
</controls:TabControl>
<Button Height="21" HorizontalAlignment="Right" Margin="0,8,8,0" VerticalAlignment="Top" Width="95" Content="Import Maps" Grid.Row="1" Click="Button_Click"/>
</Grid>
</UserControl>
.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Xml.Linq;
namespace Cod4ServerTool
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
DisplayMaps("MapList.xml");
}
private void DisplayMaps(string xmlContent)
{
XDocument xmlMaps = XDocument.Load(xmlContent);
var maps = from map in xmlMaps.Elements("Maps").Elements("map")
select new Map
{
Id = map.Element("id").Value,
Title = map.Element("title").Value,
Description = map.Element("description").Value,
ThumbNail = map.Element("thumbnail").Value,
};
MapsList_lb.SelectedIndex = -1;
MapsList_lb.ItemsSource = maps;
}
}
}
Map.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Cod4ServerTool
{
class Map
{
public string Title { get; set; }
public string Id { get; set; }
public string Description { get; set; }
public string ThumbNail { get; set; }
public override string ToString()
{
return Title;
}
}
}
答案 0 :(得分:1)
我只需添加.ToList(); {/ p>即可将maps
变量变为List
private void DisplayMaps(string xmlContent)
{
XDocument xmlMaps = XDocument.Load(xmlContent);
var maps = (from map in xmlMaps.Elements("Maps").Elements("map")
select new Map
{
Id = map.Element("id").Value,
Title = map.Element("title").Value,
Description = map.Element("description").Value,
ThumbNail = map.Element("thumbnail").Value,
}).ToList();
MapsList_lb.SelectedIndex = -1;
MapsList_lb.ItemsSource = maps;
}
修改强>:
D'哦!并且您的Map类需要声明public
。绑定不适用于内部类型。
上面使用ToList
的建议仍然有效,它更好地引用一个简单的List<Map>
来引用一个简单的XObject
,而不是引用一个LINQ查询,而该查询又依赖于{{1}的树。 }第
答案 1 :(得分:0)
实现Map类的接口INotifyPropertyChanged:
public class Map : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private string _Title;
public string Title
{
get { return _Title; }
set
{
_Title = value;
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("Title"));
}
}
}
...
}
之后它会正常工作。
更新
将地图类公开。