我有一个 MenuItem,其中包含一组项目.它看起来像文件 -> 打开菜单项.
I have a MenuItem, which has a collection of items in it. It looks like the File -> Open Menuitem.
所以:
XAML 代码:
<Menu>
<MenuItem Header="File">
<MenuItem Header="Open">
<MenuItem Header="From Database" ItemsSource="{Binding OCFragebogen}"/>
</MenuItem>
</MenuItem>
</Menu>
我想在单击特定项目时调用命令.示例:用户单击文件 1,应调用命令,其中文件 1"是命令参数.
I want to call a Command, when a specific item has been clicked. Example: User clicks on File 1, a command should be called where the "File 1" is the Command Parameter.
ViewModel 包含我想在 MenuItem集合"中显示的项目
ViewModel contains the Items, which I want to display in the MenuItem "collection"
private ObservableCollection<string> _OCFragebogen;
public ObservableCollection<string> OCFragebogen
{
get
{
if (_OCFragebogen == null)
_OCFragebogen = new ObservableCollection<string>();
return _OCFragebogen;
}
set
{
_OCFragebogen = value;
RaisePropertyChanged(() => OCFragebogen);
}
}
明确地说:当用户点击 MenuItem 中的一个项目(来自 ItemsSource)时,应该调用一个命令,我想对点击的项目执行某些操作.
To make it clear: When the user clicks on an item (from the ItemsSource) in the MenuItem, a Command should be called where I want to do something with the clicked Item.
我必须在哪里使用命令来调用 ViewModel 中的方法 (RelayCommand)?我希望在单击 ItemsSource 中的一个项目时使用它 + 我想将单击的项目传递给该方法.
Where do I have to use the command to call a method (RelayCommand) in my ViewModel? I want it to be used when an Item from the ItemsSource has been clicked + I want to pass the clicked item to the method.
这应该对你有用
<MenuItem Header="From Database"
ItemsSource="{Binding YourItemSource}">
<MenuItem.ItemContainerStyle>
<Style TargetType="MenuItem">
<Setter Property="Command" Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=MenuItem}, Path=DataContext.YourCommandName}"></Setter>
<Setter Property="CommandParameter" Value="{Binding}"></Setter>
</Style>
</MenuItem.ItemContainerStyle>
</MenuItem>
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