自定义TextBox控件，自动切换键盘语言c＃WPF

Question

我需要做那样的事情 http://www.codeproject.com/Articles/301832/Custom-Text-box-Control-that-Switch-keyboard-langu 但对于 WPF 和C＃

我试着用一个简单的 if 语句来做，但是我必须放一个像这样的文本框

    private void textBox2_TextChanged(object sender, TextChangedEventArgs e)
    {
        textBox1.Focus();
        if (textBox1.Text == "Q" || textBox1.Text == "q")
        {
            textBox2.Text = textBox2.Text+ "ض";
            textBox1.Text = "";
        }
        else if (textBox1.Text == "W" || textBox1.Text == "w")
        {
            textBox2.Text = textBox2.Text + "ص";
            textBox1.Text = "";
        }
        // and so ..
    }

它有效，但我想做一些像上面的链接

Answer 1

您可以通过创建继承TextBox的新自定义Control在WPF中执行此操作。在那里创建一个新的TextLanguage属性并覆盖OnKeyDown方法

namespace WpfApplication
{
    public enum TextLanguage
    {
        English,
        Arabic
    }

    public class CustomTextBox : TextBox
    {        
        public TextLanguage TextLanguage { get; set; }

        protected override void OnKeyDown(KeyEventArgs e)
        {
            if (TextLanguage != WpfApplication.TextLanguage.English)
            {
                e.Handled = true;
                if (Keyboard.Modifiers == ModifierKeys.Shift)
                {
                    // Shift key is down
                    switch (e.Key)
                    {
                        case Key.Q:
                            AddChars("ص");
                            break;
                        // Handle Other Cases too
                        default:
                            e.Handled = false;
                            break;
                    }
                }
                else if (Keyboard.Modifiers == ModifierKeys.None)
                {
                    switch (e.Key)
                    {
                        case Key.Q:
                            AddChars("ض");
                            break;
                        // Handle Other Cases too
                        default:
                            e.Handled = false;
                            break;
                    }
                }
            }
            base.OnKeyDown(e);
        }

        void AddChars(string str)
        {
            if (SelectedText.Length == 0)
                AppendText(str);
            else
                SelectedText = str;

            this.SelectionLength = 0;
            this.CaretIndex = Text.Length;

        }
    }
}