我怎么能在一个文本框中写一些'也用作键绑定

本文关键字：绑定 怎么能 文本 一个 | 更新日期: 2023-09-27 18:07:12

我有一个关键时期(.)的全局输入绑定。我还想把它输入TextBox吗?有办法做到这一点吗?

这里有一个简单的例子。

在"TextBox"中输入period，执行该命令。XAML: 

<Window x:Class="UnrelatedTests.Case6.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1" Height="300" Width="300">
    <Window.InputBindings>
        <KeyBinding Key="OemPeriod" Command="{Binding Command}" />
    </Window.InputBindings>
    <Grid>
        <TextBox >Unable to type "." here!</TextBox>
    </Grid>
</Window>
c#: 

using System;
using System.Windows;
using System.Windows.Input;
namespace UnrelatedTests.Case6
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
            DataContext = this;
        }
        public ICommand Command
        {
            get { return new CommandImpl(); }
        }

        private class CommandImpl : ICommand
        {
            public bool CanExecute(object parameter)
            {
                return true;
            }
            public void Execute(object parameter)
            {
                MessageBox.Show("executed!");
            }
            public event EventHandler CanExecuteChanged;
        }
    }
}

我怎么能在一个文本框中写一些'也用作键绑定

您可以绑定 KeyBinding中的Key，并在TextBox获得焦点时将其值更改为Key.None:

Xaml: 

<Window x:Class="UnrelatedTests.Case6.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window1" Height="300" Width="300"
        GotFocus="Window_GotFocus">
    <Window.InputBindings>
        <KeyBinding Key="{Binding MyKey}" Command="{Binding Command}" />
    </Window.InputBindings>
    <Grid>
        <TextBox/>
    </Grid>
</Window>

MainWindow.cs: (与 INotifyPropertyChanged实现)

    Key _myKey;
    public Key MyKey
    {
        get
        {
            return _myKey;
        }
        set
        {
            _myKey = value;
            OnPropertyChanged("MyKey");
        }
    }
    public MainWindow()
    {
        InitializeComponent();
        DataContext = this;
        MyKey = Key.OemPeriod;
    }
    private void Window_GotFocus(object sender, RoutedEventArgs e)
    {
        if (e.OriginalSource is TextBox)
            MyKey = Key.None;
        else
            MyKey = Key.OemPeriod;
    }
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