我有一个带上下文菜单的数据网格。如何防止上下文菜单显示多个选择？我尝试添加附加属性但出现错误可附加属性＆＃39; ContextMenuVisibilityMode＆＃39;未在类型＆＃39; ProcessIntasnceActivitiesView＆＃39;
中找到sklearn/feature_extraction/hashing.py答案 0 :(得分：0)
处理ContextMenuOpening的{{1}}事件。
DataGrid您可以将此逻辑放入private void DataGrid_ContextMenuOpening_1(object sender, ContextMenuEventArgs e)
{
e.Handled = (sender as DataGrid).SelectedItems.Count > 1;
}
。
AttachedProperty并将其应用于namespace WpfStackOverflow
{
/// <summary>
/// Interaction logic for Window2.xaml
/// </summary>
public partial class Window2 : Window
{
...
// Using a DependencyProperty as the backing store for ContextMenuVisibilityMode. This enables animation, styling, binding, etc...
public static readonly DependencyProperty ContextMenuVisibilityModeProperty =
DependencyProperty.RegisterAttached("ContextMenuVisibilityMode", typeof(string), typeof(Window2), new PropertyMetadata("Extended", new PropertyChangedCallback(OnContextMenuVisibilityModeChanged)));
private static void OnContextMenuVisibilityModeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DataGrid dgrd = d as DataGrid;
dgrd.ContextMenuOpening += ((sender, args) => {
if (e.NewValue.ToString() == "Single")
args.Handled = (sender as DataGrid).SelectedItems.Count > 1;
else if (e.NewValue.ToString() == "Extended")
args.Handled = !((sender as DataGrid).SelectedItems.Count > 1);
else {
// do something
}
});
}
...
}
：
DataGrid