有一个项目动态加载wpf的菜单控件可以非常有效的做到更具用户权限显示或控制MenuItem菜单，如何实现这种功能，其实也非常简单。
首先需要了解Wpf的menu菜单控件，她的结构其实也非常简单
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<Menu DockPanel.Dock="Top" Name="MenuOptionGroup">
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<MenuItem Header="菜单1">
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<MenuItem Header="内容1">
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</MenuItem>
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</MenuItem>
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<MenuItem Header="菜单2">
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</MenuItem>
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</Menu>
这是其最基本的结构，menu是其菜单主体，menu下面有menuitem,menuitem可以无限的放入menuitem.
具体思路：
获取需要的显示菜单数据（数据需要拥有父id字段，就是这个menitem的上一级menuitem的id），通过先查询出menuitem数据的父id字段为0的menuitem的数据（就是menuitem没有上一级菜单的菜单项目）Add加载menuitem 到menu。然后继续拿到此的id来做查询出是否还有父id的数为此id的，如果有就继续下去，没有则给menuitem 注册一个click事件，用于点击菜单项目做相应的操作。
数据库表设计：
具体实现方法：
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public List<MenuItem> menuItems = new List<MenuItem>();
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public MainIndex()
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{
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InitializeComponent();
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SetMenus();
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foreach (var item in menuItems)
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{
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MenuOptionGroup.Items.Add(item);
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}
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}
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private void SetMenus()
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{
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List<GblMenu> lstMenus = lstGblMenuItem.Where(t => t.PaterId == 0).ToList();
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foreach (GblMenu item in lstMenus)
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{
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MenuItem menuItem = new MenuItem();
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menuItem.Header = item.MenuName;
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menuItem.Name = item.ItemName;
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menuItem = SetMenuItems(menuItem, item.Id);
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menuItems.Add(menuItem);
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}
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}
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private MenuItem SetMenuItems(MenuItem menuItem, int PatId)
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{
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List<GblMenu> lstMenuItems = lstGblMenuItem.Where(t => t.PaterId == PatId).ToList();
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foreach (GblMenu item in lstMenuItems)
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{
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MenuItem menuItems = new MenuItem();
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menuItems.Header = item.MenuName;
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menuItems.Name = item.ItemName;
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menuItem.Items.Add(menuItems);
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if (!lstGblMenuItem.Where(t => t.PaterId == item.Id).ToList().Any())
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{
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menuItems.Click += MenuItems_Click;
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}
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SetMenuItems(menuItems, item.Id);
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}
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return menuItem;
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}
效果：
结语：
其实这只是其中一个方法，且这种方法也适用与Winform,都是同一个套路。
出处：https://blog.csdn.net/weixin_42084199/article/details/95042521
========================================================================
WPF动态创建右键菜单
第一步：菜单接口定义
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public interface IMenuItem
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{
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/// <summary>
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/// 图标
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/// </summary>
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string ImageURL { get; set; }
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/// <summary>
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/// 名称
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/// </summary>
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string Caption { get; set; }
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/// <summary>
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/// 是否开始分组
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/// </summary>
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bool IsBeginGroup { get; set; }
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/// <summary>
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/// 是否可用
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/// </summary>
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bool IsEnable { get; set; }
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/// <summary>
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/// 是否可见
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/// </summary>
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bool IsVisible { get; set; }
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/// <summary>
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/// 子菜单集合
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/// </summary>
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List<IMenuItem> SubMenus { get; }
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/// <summary>
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/// 执行菜单
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/// </summary>
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void ExcuteItem(object OperObj);
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}
第二步：实现菜单接口
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public class MyMeunItem : IMenuItem
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{
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private Action<object> _action;
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public MyMeunItem()
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{
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m_SubMenus = new List<IMenuItem>();
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}
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public MyMeunItem(Action<object> action)
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{
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_action = action;
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m_SubMenus = new List<IMenuItem>();
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}
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private string m_Caption = "菜单";
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public string Caption
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{
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get
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{
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return m_Caption;
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}
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set
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{
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m_Caption = value;
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}
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}
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public string ImageURL
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{
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get;
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set;
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}
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private bool m_IsBeginGroup;
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public bool IsBeginGroup
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{
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get
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{
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return m_IsBeginGroup;
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}
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set
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{
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m_IsBeginGroup = value;
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}
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}
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private bool m_IsEnable = true;
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public bool IsEnable
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{
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get
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{
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return m_IsEnable;
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}
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set
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{
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m_IsEnable = value;
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}
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}
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private bool m_IsVisible = true;
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public bool IsVisible
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{
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get
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{
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return m_IsVisible;
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}
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set
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{
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m_IsVisible = value;
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}
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}
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private List<IMenuItem> m_SubMenus;
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public List<IMenuItem> SubMenus
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{
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get
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{
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return m_SubMenus;
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}
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}
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public void ExcuteItem(object OperObj)
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{
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if (_action != null)
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{
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_action(OperObj);
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}
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else
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{
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MessageBox.Show("MyMenu Do...");
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}
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}
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}
第三步：自定义控件，添加菜单依赖属性（以button为例）
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public class MyCustomButton : Button
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{
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static MyCustomButton()
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{
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}
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public ObservableCollection<IMenuItem> MenuItems
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{
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get { return (ObservableCollection<IMenuItem>)GetValue(MenuItemsProperty); }
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set { SetValue(MenuItemsProperty, value); }
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}
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public static readonly DependencyProperty MenuItemsProperty =
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DependencyProperty.Register("MenuItems",
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typeof(ObservableCollection<IMenuItem>),
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typeof(MyCustomButton),
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new PropertyMetadata(null, new PropertyChangedCallback(MenuItemsChanged)));
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private static void MenuItemsChanged(DependencyObject dpObj, DependencyPropertyChangedEventArgs e)
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{
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try
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{
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MyCustomButton dropButton;
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if (dpObj is MyCustomButton)
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dropButton = dpObj as MyCustomButton;
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else
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return;
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dropButton.ContextMenu = new ContextMenu();
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ObservableCollection<IMenuItem> colItems = (ObservableCollection<IMenuItem>)dpObj.GetValue(MenuItemsProperty);
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if (colItems == null)
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return;
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foreach (var item in colItems)
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{
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MenuItem menuItem = new MenuItem()
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{
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Header=item.Caption,
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Icon = item.ImageURL,
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IsEnabled = item.IsEnable,
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Visibility = item.IsVisible ? Visibility.Visible : Visibility.Collapsed,
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Tag = item
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};
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menuItem.Click += (obj, arg) => ((obj as MenuItem).Tag as IMenuItem).ExcuteItem(obj);
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// 是否开始分组
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if (item.IsBeginGroup)
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{
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dropButton.ContextMenu.Items.Add(new Separator());
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}
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dropButton.ContextMenu.Items.Add(menuItem);
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}
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dropButton.ContextMenu.PlacementTarget = dropButton;
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dropButton.ContextMenu.Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom;
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}
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catch (Exception ex)
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{ }
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}
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}
第四步：XAML中添加该自定义按钮
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<Window x:Class="DropDownTest.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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xmlns:local="clr-namespace:DropDownTest"
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xmlns:uc="clr-namespace:GtMap.Pro.Package.Controls;assembly=GtMap.Pro.Package.Controls"
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mc:Ignorable="d"
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Title="MainWindow" Height="350" Width="525">
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<Window.DataContext>
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<local:MainFormVM/>
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</Window.DataContext>
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<Grid>
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<Grid.RowDefinitions>
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<RowDefinition Height="40"></RowDefinition>
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<RowDefinition Height="40"></RowDefinition>
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</Grid.RowDefinitions>
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<uc:MyCustomButton Grid.Row="0" MenuItems="{Binding MenuItems}" Content="下拉按钮" Margin="0" Width="60" Height="20"></uc:MyCustomButton>
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</Grid>
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</Window>
第五步：ViewModel编写，添加菜单项
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public class MainFormVM : INotifyPropertyChanged
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{
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public MainFormVM()
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{
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try
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{
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m_MenuItems = new ObservableCollection<IMenuItem>();
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m_MenuItems.Add(new MyMeunItem() { Caption = "菜单1" });
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var item = new MyMeunItem(MenuFunc) { Caption = "菜单2", IsBeginGroup = true };
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m_MenuItems.Add(item);
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}
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catch
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{
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}
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}
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private ObservableCollection<IMenuItem> m_MenuItems;
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public event PropertyChangedEventHandler PropertyChanged;
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public ObservableCollection<IMenuItem> MenuItems
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{
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get
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{
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return m_MenuItems;
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}
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set
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{
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m_MenuItems = value;
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PropertyChanged(this, new PropertyChangedEventArgs("MenuItems"));
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}
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}
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public void MenuFunc(object obj)
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{
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MessageBox.Show("VM VM VM");
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}
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}
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public class MyCommand : ICommand
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{
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Action<object> _action;
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public MyCommand(Action<object> action)
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{
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_action = action;
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}
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public event EventHandler CanExecuteChanged;
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public bool CanExecute(object parameter)
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{
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return true;
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}
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public void Execute(object parameter)
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{
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if (_action != null)
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_action(parameter);
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}
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}
界面效果
==
WPF 绑定方式动态创建菜单
原文地址：https://www.cnblogs.com/mq0036/p/12371140.html