WPF-名称在命名空间中不存在

Question

I am having a namespace issue while trying to implement some custom bindings in WPF. I am getting the error 'The name 'CustomCommands' does not exist in the namespace 'clr-namespace:GraphicsBook;assembly=Testbed2D".

In my XAML I have:

<Window x:Class="GraphicsBook.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:k="clr-namespace:GraphicsBook;assembly=Testbed2D"
Title="Window1"

 <Window.CommandBindings>
    <CommandBinding Command="k:CustomCommands.AddCircle" CanExecute="AddCircleCommand_CanExecute" Executed="AddCircleCommand_Executed"></CommandBinding>
</Window.CommandBindings>

<Menu>
    <MenuItem Header="Add">
        <MenuItem Command="k:CustomCommands.AddCircle" />
    </MenuItem>
</Menu>

And my CustomsCommand.cs file is within the project folder. Within this file is:

namespace GraphicsBook
{
    public partial class CustomCommandSample : Window
    {
        public CustomCommandSample()
        {
            ...
        }

        private void AddCircleCommand_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = true;
        }
    }

    public static class CustomCommands
    {
        public static readonly RoutedUICommand AddCircle = new RoutedUICommand
            (
                    "AddCircle",
                    "AddCircle",
                    typeof(CustomCommands),
                    new InputGestureCollection()
                            {
                                    new KeyGesture(Key.F4, ModifierKeys.Alt)
                            }
            );
    }
}

The error comes from the line 'MenuItem Command="k:CustomCommands.AddCircle"'.

Any help would be much appreciated!!

Answer 1

Your XML/CLR namespace mapping is wrong: you have k aliasing GraphicsBook , but CustomCommands is declared in GraphicsBook.Assignment .

You can also try using {x:Static k:CustomCommands.AddCircle} instead of simply k:CustomCommands.AddCircle .