WPF (XAML): Shortcut key Event

Question

I have a problem with my XAML. I have a Menu Component, and I would like that it would work in Shortcut key too. I have XAML code, which doesn't work:

  <MenuItem Header="_New" Name="New" Click="New_Click" InputGestureText="Ctrl+N">
 <MenuItem.InputBindings>
 <KeyBinding Key="N" Modifiers="control"/>
 </MenuItem.InputBindings>
 </MenuItem>

What is the solution? New_Click event works, but Shortcut key doesn't...

Answer 1

Using InputGestureText is only going to add text to the menu item per the documentation. You need to specify what needs to happen when the shortcut is actually performed. To do that you need to create an ICommand in your ViewModel, preferably, then bind that command to the MenuItem.Command

So your resulting code should look like this:

<MenuItem Header="_New" Name="New" Command="{Binding NewCommand}" InputGestureText="Ctrl+N">

assuming you have a public ICommand NewCommand {...} in your view model.

EDIT

Doing this requires a command because that's how WPF works. WPF != WinForms, where in WinForms you would use events and in WPF you want to try to use ICommand bindings. This is proven, and answers your question on why Command is required: it is because InputBinding implements the Command design pattern, so you're not going to really get a way to work around it.

So there isn't really a way to work around using the Click event handler instead of a Command with input gestures. If you're not in the position to use a Command as they are intended to be use (like in MVVM), then you will have to add an ICommand in code-behind, then programmatically set up the binding.

private RelayCommand qatRemoveItemCommand;

public ICommand RemoveItemCommand
{
    get
    {
        if (this.RemoveItemCommand == null)
        {
            this.RemoveItemCommand = new RelayCommand(param => this.RemoveItem(), param => CanRemoveItem);
        }
        return this.RemoveItemCommand;
    }
}

private void RemoveItem()
{
    this.DeleteItem();
}

private bool CanRemoveItem
{
    get
    {
        return true;
    }
}

KeyBinding RemoveItemCmdKeyBinding = new KeyBinding(
    this.RemoveItemCommand, 
    Key.N, 
    ModifierKeys.Control);

New.InputBindings.Add(OpenCmdKeyBinding);

<MenuItem Header="_New" Name="New" InputGestureText="Ctrl+N">

Note it may be required that you Remove or clear the InputBindings when the control is unloaded, but I think this will be as close as you can get, not to mention my original answer answer's your question; your request for additional information is a separate question in itself.

Also, do some research on the classes that implement inherit from InputBinding, KeyBinding and MouseBinding