WPF 制作侧边栏菜单之MenuItem

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有小伙伴问我有没有做过菜单栏，这我确实没做过，不过现在做还不晚吧，

先来做一个MenuItem,使用MVVM模式写，这样创建菜单的时候，只要绑定datacontext，就ok了，使用极为方便，还可以自定义颜色相关的属性。

先来看一下效果：

下面就来看看代码喽：

首先创建一个自定义控件类：


             using System;using System.Collections.Generic;using System.ComponentModel;using System.Windows;using System.Windows.Controls;using System.Windows.Markup;using System.Windows.Media;
namespace WPFDemos{    [DefaultProperty("MenuItems")]    [ContentProperty("MenuItems")]    [TemplatePart(Name = LB, Type = typeof(ListBox))]    public class SideMenuItem : Control    {        private const string LB = "LB";        private ListBox _listBox;        public bool IsExpanded        {            get { return (bool)GetValue(IsExpandedProperty); }            set { SetValue(IsExpandedProperty, value); }        }        public static readonly DependencyProperty IsExpandedProperty =            DependencyProperty.Register("IsExpanded", typeof(bool), typeof(SideMenuItem), new PropertyMetadata(false));
        public List<object> MenuItems        {            get { return (List<object>)GetValue(MenuItemsProperty); }            set { SetValue(MenuItemsProperty, value); }        }        public static readonly DependencyProperty MenuItemsProperty =            DependencyProperty.Register("MenuItems", typeof(List<object>), typeof(SideMenuItem), new PropertyMetadata(default(List<object>)));
        public Brush ToggleBackground        {            get { return (Brush)GetValue(ToggleBackgroundProperty); }            set { SetValue(ToggleBackgroundProperty, value); }        }        public static readonly DependencyProperty ToggleBackgroundProperty =            DependencyProperty.Register("ToggleBackground", typeof(Brush), typeof(SideMenuItem), new PropertyMetadata(new SolidColorBrush(Color.FromRgb(0x2d, 0x2d, 0x30))));
        public Brush MenuItemBackground        {            get { return (Brush)GetValue(MenuItemBackgroundProperty); }            set { SetValue(MenuItemBackgroundProperty, value); }        }        public static readonly DependencyProperty MenuItemBackgroundProperty =            DependencyProperty.Register("MenuItemBackground", typeof(Brush), typeof(SideMenuItem), new PropertyMetadata(new SolidColorBrush(Color.FromRgb(0x16, 0x18, 0x1D))));
        public Brush MenuItemSelectedBackground        {            get { return (Brush)GetValue(MenuItemSelectedBackgroundProperty); }            set { SetValue(MenuItemSelectedBackgroundProperty, value); }        }        public static readonly DependencyProperty MenuItemSelectedBackgroundProperty =            DependencyProperty.Register("MenuItemSelectedBackground", typeof(Brush), typeof(SideMenuItem), new PropertyMetadata(Brushes.Green));
        public static readonly RoutedEvent MenuItemSelectedChangedEvent = EventManager.RegisterRoutedEvent("MenuItemSelectedChanged", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(SideMenuItem));