WPF应用程序中动态和静态菜单项绑定错误

本文关键字:菜单项 绑定 错误 静态 应用程序 动态 WPF | 更新日期: 2023-09-27 18:16:22

在我的WPF应用程序中,我从动态源(XML)创建了一个菜单。我将此与静态MenuItem相结合,它运行良好,但我在静态MenuItem上得到一些错误。菜单看起来像这样

Entity
- dynamic menu items
- separator
- static menu item

System.Windows。数据错误:4:找不到要绑定的源引用"RelativeSource FindAncestor"AncestorType = ' System.Windows.Controls.ItemsControl ',AncestorLevel ="1"。BindingExpression:路径= HorizontalContentAlignment;DataItem =零;目标元素是'菜单项' (Name= ");目标属性is 'HorizontalContentAlignment' (type 'HorizontalAlignment')

VerticalAlignment相同,在我打开菜单后,我也得到这个错误

System.Windows。数据错误:40:BindingExpression路径错误在"对象"ModViewModel"上找不到"MenuItemName"属性(HashCode = 13278932)"。BindingExpression:路径= MenuItemName;DataItem = ' ModViewModel ' (HashCode = 13278932);目标元素是"子菜单"(Name = ");目标属性为'Header'(类型为'Object')

绑定的XAML

<MenuItem Header="_Entity">
    <MenuItem.ItemsSource>
        <CompositeCollection>
            <CollectionContainer Collection="{Binding Source={StaticResource MenuItems}}" />
            <Separator></Separator>
            <MenuItem Header="Edit Templates"/>
        </CompositeCollection>
    </MenuItem.ItemsSource>
    <MenuItem.ItemContainerStyle>
        <Style TargetType="MenuItem">
            <Setter Property="MenuItem.Header" Value="{Binding MenuItemName}"/>
            <Setter Property="CommandParameter" Value="{Binding Components}"/>
        </Style>
     </MenuItem.ItemContainerStyle>
</MenuItem>

是否有一种方法可以将静态菜单项与动态菜单项分开,使静态菜单项不使用ItemContainerStyle?或者是什么导致了错误?如果你需要更多的代码,请告诉我。

编辑:

public ObservableCollection<Models.EntityMenuItem> MenuItems
{
    get { return _menuItem; }
    set
    {
        _menuItem = value;
        OnPropertyChanged();
    }
}
public class EntityMenuItem
{
    public string MenuItemName { get; set; }
    public Dictionary<string,bool> Components { get; set; }
}

WPF应用程序中动态和静态菜单项绑定错误

这对我有用,

 <Window.Resources>
    <CollectionViewSource x:Key="FilterOptionsBridge" Source="{Binding Path=MyProperty}" />
 </Window.Resources>

ViewModelProperty:

public List<string> MyProperty { get; private set; }

在ViewModel的构造函数中:

MyProperty = new List<string>();
        MyProperty.Add("Menu1");

菜单项:

  <MenuItem>
     <MenuItem.ItemsSource>
        <CompositeCollection>
           <CollectionContainer Collection="{Binding Source={StaticResource FilterOptionsBridge}}" />
            <Separator></Separator>
            <MenuItem Header="Hello"></MenuItem>
        </CompositeCollection>                            
      </MenuItem.ItemsSource>
    </MenuItem>

对于使用命令,你必须创建如下样式,

 <Style TargetType="MenuItem" >
     <Setter Property="Header" Value="{Binding Path=Title}"/>         
     <Setter Property="Command" Value="{Binding Path=Command}"/>
     <Setter Property="CommandParameter" Value="{Binding Path=CommandParameter}"/>
 </Style>

现在看起来是

 <MenuItem>
    <MenuItem.Style>
       <Style TargetType="MenuItem">                            
          <Setter Property="Command" Value="{Binding Path=Command}"/>
          <Setter Property="CommandParameter" Value="{Binding Path=CommandParameter}"/>
       </Style>
    </MenuItem.Style>
  <MenuItem.ItemsSource>
 <CompositeCollection>
     <CollectionContainer Collection="{Binding Path=Title, Source={StaticResource FilterOptionsBridge}}" />
        <Separator></Separator>
            <MenuItem Header="Hello"></MenuItem>
      </CompositeCollection>                            
     </MenuItem.ItemsSource>
    </MenuItem>

您的VM集合,例如

 public List<Menuitems> MyProperty { get; private set; }

Menuitems.cs,

 public class Menuitems //Impliment INotifyPropertyChanged Interface
    {
        private List<string> _Title = new List<string>();
        private ICommand _Command;
        private object _Commandparameter;            
        public List<string> Title
        {
            get { return _Title; }
            set { _Title = value; NotifyPropertyChanged(); }
        }
        public ICommand Command
        {
            get { return _Command; }
            set { _Command = value; NotifyPropertyChanged(); }
        }
        public object CommandParameter
        {
            get { return _Commandparameter; }
            set { _Commandparameter = value; NotifyPropertyChanged(); }
        }           
    }

在我的VM构造函数中,

 var menu1 = new Menuitems() { Title = new List<string>() {"Menu1","Menu2" }, Command=command, CommandParameter=commandparameter };            
        MyProperty = new List<Menuitems>() { menu1 };

这个链接是CollectionContainer的一个很好的例子