<MenuItem Command="local:CommandLibrary.RegisterServiceCommand">
<MenuItem.CommandParameter>
<MultiBinding Converter="{StaticResource TrayWindowViewModelConverterResource}">
<MultiBinding.Bindings>
<Binding ElementName="Me" />
<Binding FallbackValue="Parser" />
</MultiBinding.Bindings>
</MultiBinding>
</MenuItem.CommandParameter>
</MenuItem>
public class TrayWindowViewModelConverter : IMultiValueConverter {
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) {
var viewModel = new Window1ViewModel();
foreach (var obj in values) {
if (obj is Window)
viewModel.Caller = obj as Window;
else if (obj is string)
viewModel.ServiceName = obj.ToString();
}
return viewModel;
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) {
throw new NotImplementedException();
}
}
按钮cammand与MenuItem完全相同。当我为MenuItem调试Converter时,values参数包含两个对象:DependencyProperty.UnsetValue(我不知道这是什么)和MyContextMenu对象。
还有我如何将SomeType作为参数传递? 感谢
答案 0 :(得分:1)
MenuItems存在于主视觉树之外的弹出窗口中,因此与周围元素的名称范围不同,例如Button。尝试绑定时,ElementName绑定无法解析,因为“Me”元素位于MenuItem的名称范围之外。