如何在WPF的ListBox中根据数据自定义Item的位置
话说，包包想在游戏大厅里实现只操作数据源就能更新绑定控件的需求。OK，你一定会说，用ListBox。没错，ListBox就是干这个用的：
以下是xaml和后台代码：
<UserControl x:Class="TestDeskBindingWpfApplication.PaneDesk"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:TestDeskBindingWpfApplication"
Height="160" Width="160">
<UserControl.Resources>
<Style TargetType="{x:Type Image}" x:Key="desk" />
<local:ImageConverter x:Key="imageConverter" />
<local:HandConverter x:Key="handConverter" />
<local:LeftConverter x:Key="leftConverter" />
<local:TopConverter x:Key="topConverter" />
<DataTemplate DataType="{x:Type local:UserInfo}">
<TextBlock>
<Image Canvas.Left="60" Canvas.Top="3" Name="chair"
Source="{Binding Path=ImageIndex, Converter={StaticResource imageConverter},
Mode=TwoWay, NotifyOnTargetUpdated=True}" />
<Image Canvas.Left="86" Canvas.Top="53" Name="hand" Source="Img/hand.gif"
Visibility="{Binding Path=IsPrepareOK, Converter={StaticResource handConverter},
Mode=TwoWay, NotifyOnTargetUpdated=True}" />
<Label Name="lblUser" Width="54"
Canvas.Left="{Binding Path=DeskPosition, Converter={StaticResource leftConverter}}"
Canvas.Top="{Binding Path=DeskPosition, Converter={StaticResource topConverter}}"
Content="{Binding Path=UserName, Mode=TwoWay, NotifyOnTargetUpdated=True}" />
</TextBlock>
</DataTemplate>
</UserControl.Resources>
<Canvas Background="#FF28699E">
<ListBox Canvas.Left="0" Canvas.Top="0" Height="160" x:Name="r1" Width="160" />
</Canvas>
</UserControl>
相应数据源代码：
public ObservableCollection<UserInfo> Users = new ObservableCollection<UserInfo>();
UserInfo user = null;
user = new UserInfo { UserId = 2, UserName = "kitty", DeskId = 1, DeskPosition = 1, ImageIndex = 4, IsPrepareOK = true };
Users.Add(user);
user = new UserInfo { UserId = 1, UserName = "jax", DeskId = 1, DeskPosition = 2, ImageIndex = 3 };
Users.Add(user);
user = new UserInfo { UserId = 4, UserName = "dx", DeskId = 1, DeskPosition = 3, ImageIndex = 1 };
Users.Add(user);
user = new UserInfo { UserId = 3, UserName = "jeffrey", DeskId = 1, DeskPosition = 4, ImageIndex = 4 };
Users.Add(user);
r1.ItemsSource = Users;
这样做的好处是，以后我只需要Users.Add(newUser)或Users.Remove(oldUser)就可以同时控制桌子上显示的用户了。
但是，我要说，我想在桌子里实现这样的效果：
就是说，对号入座，将ListBox中的每个Item都能自定义它的定位，但遗憾的是，ListBox中的Item要么是横向排列的，要么是纵向的，不支持随意定位。
