Silverlight实用窍门系列：8. Accordion模拟菜单,Accordion动态绑定数据,模拟菜单点击【附带源码实例】
在实际应用中，我们常常会遇到创建菜单树的情况，而Silverlight的TreeView有时候不能满足要求，在这里我们将使用Accordion模拟一个效果比较好的菜单。
在本节中，我们使用绑定的方式来动态的显示ObservableCollection数据源集合。
首先我们需要在项目中引入System.Windows.Controls.Toolkit.dll和System.Windows.Controls.Layout.Toolkit.dll两个DLL文件。然后再XAML和XAML.CS代码中引用他们。
然后我们开始准备数据源部分，首先我们声明两个实体类，Catalog类和TestSimple类。其中Catalog类有一个属性为TestSimple类的集合（通俗的说就是Catalog类的一个属性是多个TestSimple类对象的实体）。Catalog类是一级菜单，TestSimple类是二级菜单，所以一级菜单除了自己需要名字之外，还需要有多个二级菜单项。在这里，我们贴出数据源的两个实体类代码如下：
/// <summary>
/// 一级菜单
/// </summary>
public class Catalog
{
public Catalog()//实例化本类的时候，调用本构造函数让初始化TestSimples属性
{
TestSimples = new ObservableCollection<TestSimple>();
}
public string CatalogName { get; set; } //一级菜单名称
public ObservableCollection<TestSimple> TestSimples { get; set; }//二级菜单项的集合。
}
/// <summary>
/// 二级菜单项
/// </summary>
public class TestSimple
{
public string Name { get; set; } //二级菜单名称
public string TestID { get; set; } //二级菜单ID
}
声明了这两个实体类之后，我们需要构造数据源集合，然后绑定到Accordion菜单，其关键代码如下：
ObservableCollection<Catalog> catalogsk = new ObservableCollection<Catalog>();
string BlackStr = " ";
catalogsk.Add(
new Catalog()
{
CatalogName = "配置菜单",
TestSimples = new ObservableCollection<TestSimple>()
{
new TestSimple(){Name=BlackStr+"系统配置",TestID="configSystem"},
new TestSimple(){Name=BlackStr+"用户配置",TestID="configUser"},
new TestSimple(){Name=BlackStr+"日志配置",TestID="configCatalog"},
new TestSimple(){Name=BlackStr+"网络配置",TestID="configNetwork"},
}
}
);
catalogsk.Add(
new Catalog()
{
CatalogName = "查询菜单",
TestSimples = new ObservableCollection<TestSimple>()
{
new TestSimple(){Name=BlackStr+"查询成绩",TestID="SearchSystem"},
new TestSimple(){Name=BlackStr+"查询日志",TestID="SearchUser"},
new TestSimple(){Name=BlackStr+"查询新闻",TestID="SearchNews"},
new TestSimple(){Name=BlackStr+"查询数目",TestID="SearchNumber"},
new TestSimple(){Name=BlackStr+"查询地理",TestID="SearchAddr"},
new TestSimple(){Name=BlackStr+"查询书籍",TestID="SearchProgram"},
}
}
);
catalogsk.Add(
new Catalog()
{
CatalogName = "修改菜单",
TestSimples = new ObservableCollection<TestSimple>()
{
new TestSimple(){Name=BlackStr+"查询成绩",TestID="EditSystem"},
new TestSimple(){Name=BlackStr+"修改日志",TestID="EditUser"},
new TestSimple(){Name=BlackStr+"修改新闻",TestID="EditNews"},
new TestSimple(){Name=BlackStr+"修改数目",TestID="EditNumber"},
new TestSimple(){Name=BlackStr+"修改地理",TestID="EditAddr"},
new TestSimple(){Name=BlackStr+"修改书籍",TestID="EditProgram"},
}
}
);
theList.ItemsSource = catalogsk;
我们再贴出XAML关键代码即可。在这里
<layoutToolkit:Accordion x:Name="theList" SelectionMode="ZeroOrMore" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Top" Width="200" Margin="5" BorderBrush="#FF849AAD" Height="Auto" BorderThickness="1">
<layoutToolkit:Accordion.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Name}" />
</StackPanel>
</DataTemplate>
</layoutToolkit:Accordion.ItemTemplate>
<layoutToolkit:Accordion.ContentTemplate>
<DataTemplate>
<ListBox ItemsSource="{Binding TestSimples}" BorderThickness="0" Width="200" HorizontalAlignment="Stretch">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" Tag="{Binding TestID}" MouseLeftButtonDown="TextBlock_MouseLeftButtonDown"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DataTemplate>
</layoutToolkit:Accordion.ContentTemplate>
</layoutToolkit:Accordion>
其中SelectionMode="ZeroOrMore"是设置本菜单的可以打开0个一级菜单也可以同时打开多个菜单项。Accordion.ItemTemplate是一级菜单的绑定列，Accordion.ContentTemplate是二级菜单的绑定列，在这里，二级菜单里面我们再内嵌了一个ListBox，然后这个ListBox再绑定了一个TextBlock列，并且这个列还有一个鼠标点击事件，在这个事件里面弹出触发事件的TextBlock的Tag标签值。通过这个标签值，我们可以控制点击菜单某项之后显示什么页面。
至此，我们使用Accordion控件模拟了一个菜单，并且可以根据数据源自动生成菜单项。在这里我们贴出完整的源代码如下：
MainPage.xaml
<UserControl x:Class="SLReadXML.MainPage"
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"
xmlns:layoutToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Layout.Toolkit"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="White">
<layoutToolkit:Accordion x:Name="theList" SelectionMode="ZeroOrMore" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Top" Width="200" Margin="5" BorderBrush="#FF849AAD" Height="Auto" BorderThickness="1">
<layoutToolkit:Accordion.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding CatalogName}" />
</StackPanel>
</DataTemplate>
</layoutToolkit:Accordion.ItemTemplate>
<layoutToolkit:Accordion.ContentTemplate>
<DataTemplate>
<ListBox ItemsSource="{Binding TestSimples}" BorderThickness="0" Width="200" HorizontalAlignment="Stretch">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" Tag="{Binding TestID}" MouseLeftButtonDown="TextBlock_MouseLeftButtonDown"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DataTemplate>
</layoutToolkit:Accordion.ContentTemplate>
</layoutToolkit:Accordion>
</Grid>
</UserControl>
MainPage.xaml.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.IO;
using System.Xml;
using System.Windows.Browser;
using System.ComponentModel;
using System.Collections.ObjectModel;
namespace SLReadXML
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
BindDataSource();
}
public void BindDataSource()
{
ObservableCollection<Catalog> catalogsk = new ObservableCollection<Catalog>();
string BlackStr = " ";
catalogsk.Add(
new Catalog()
{
CatalogName = "配置菜单",
TestSimples = new ObservableCollection<TestSimple>()
{
new TestSimple(){Name=BlackStr+"系统配置",TestID="configSystem"},
new TestSimple(){Name=BlackStr+"用户配置",TestID="configUser"},
new TestSimple(){Name=BlackStr+"日志配置",TestID="configCatalog"},
new TestSimple(){Name=BlackStr+"网络配置",TestID="configNetwork"},
}
}
);
catalogsk.Add(
new Catalog()
{
CatalogName = "查询菜单",
TestSimples = new ObservableCollection<TestSimple>()
{
new TestSimple(){Name=BlackStr+"查询成绩",TestID="SearchSystem"},
new TestSimple(){Name=BlackStr+"查询日志",TestID="SearchUser"},
new TestSimple(){Name=BlackStr+"查询新闻",TestID="SearchNews"},
new TestSimple(){Name=BlackStr+"查询数目",TestID="SearchNumber"},
new TestSimple(){Name=BlackStr+"查询地理",TestID="SearchAddr"},
new TestSimple(){Name=BlackStr+"查询书籍",TestID="SearchProgram"},
}
}
);
catalogsk.Add(
new Catalog()
{
CatalogName = "修改菜单",
TestSimples = new ObservableCollection<TestSimple>()
{
new TestSimple(){Name=BlackStr+"查询成绩",TestID="EditSystem"},
new TestSimple(){Name=BlackStr+"修改日志",TestID="EditUser"},
new TestSimple(){Name=BlackStr+"修改新闻",TestID="EditNews"},
new TestSimple(){Name=BlackStr+"修改数目",TestID="EditNumber"},
new TestSimple(){Name=BlackStr+"修改地理",TestID="EditAddr"},
new TestSimple(){Name=BlackStr+"修改书籍",TestID="EditProgram"},
}
}
);
theList.ItemsSource = catalogsk;
}
private void TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
TextBlock tb = sender as TextBlock;
MessageBox.Show(tb.Tag.ToString());
}
}
/// <summary>
/// 一级菜单
/// </summary>
public class Catalog
{
public Catalog()//实例化本类的时候，调用本构造函数让初始化TestSimples属性
{
TestSimples = new ObservableCollection<TestSimple>();
}
public string CatalogName { get; set; } //一级菜单名称
public ObservableCollection<TestSimple> TestSimples { get; set; }//二级菜单项的集合。
}
/// <summary>
/// 二级菜单项
/// </summary>
public class TestSimple
{
public string Name { get; set; } //二级菜单名称
public string TestID { get; set; } //二级菜单ID
}
}
本实例采用VS2010+Silverlight 4.0编写。点击 SLAccordion.rar 下载源码。
